missing 2nd processor

I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
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Hi Laurie,
Are you sure you aren't confusing dual processors with a dual core processor? A dual core processor, which is what I believe you have, is a single processor that can handle two threads simultaneously - essentially two processing units in one cpu. This is very different from a dual processor system which would have two distinct and separate cpu's. What model Viao is this? The specifications should tell us for certain.
-- Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP http://mvp.support.microsoft.com/ Windows help - www.rickrogers.org
"Laurie Miles" wrote in message

I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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Rick,
That's NOT what a dual core CPU is. You're confusing it with HyperThreading on a single core cpu.
Dual core is two physical CPUs on a single chip and should show up as two CPUs.
Although, in XP, so does Hyperthreading.
Tom "Rick Rogers" wrote in message

Hi Laurie,
Are you sure you aren't confusing dual processors with a dual core processor? A dual core processor, which is what I believe you have, is a single processor that can handle two threads simultaneously - essentially two processing units in one cpu. This is very different from a dual processor system which would have two distinct and separate cpu's. What model Viao is this? The specifications should tell us for certain.
-- Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP http://mvp.support.microsoft.com/ Windows help - www.rickrogers.org
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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She has a dual-core processor that should appear as one physical processor and two logical processors (the same as a single core cpu with hyperthreading). However it does not follow that it works by allowing two threads. I use a dual-core AMD64 that does not support hyperthreading and shows up as two logical processors. A dual-core processor with hyperthreading would show up as four processors.
XP Pro can handle two sockets, each of which would contain one physical processor and (in a dual-core) two logical processors for a total of four logical processors. With hyperthreading you would see eight logical processors.
(XP Home can only handle one socket).
MS licensing is by socket (for server products like Exchange).

"Tom Scales" wrote in message

Rick,
That's NOT what a dual core CPU is. You're confusing it with HyperThreading on a single core cpu.
Dual core is two physical CPUs on a single chip and should show up as two CPUs.
Although, in XP, so does Hyperthreading.
Tom "Rick Rogers" wrote in message Hi Laurie,
Are you sure you aren't confusing dual processors with a dual core processor? A dual core processor, which is what I believe you have, is a single processor that can handle two threads simultaneously - essentially two processing units in one cpu. This is very different from a dual processor system which would have two distinct and separate cpu's. What model Viao is this? The specifications should tell us for certain.
-- Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP http://mvp.support.microsoft.com/ Windows help - www.rickrogers.org
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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Crap, I didn't explain that very well, did I? Yes, a duo core is two functional cpu's on a single chip, not hyperthreading. What I was trying to convey (should'a thought more before sending) is that this "single" chip may show up as so in Device Manager. The OP was intimating that they had two physically separate cpu's, but in fact there is just one which contains two processing units on it. I was trying (poorly) to explain why only one would show up.
-- Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP http://mvp.support.microsoft.com/ Windows help - www.rickrogers.org
"Tom Scales" wrote in message

Rick,
That's NOT what a dual core CPU is. You're confusing it with HyperThreading on a single core cpu.
Dual core is two physical CPUs on a single chip and should show up as two CPUs.
Although, in XP, so does Hyperthreading.
Tom "Rick Rogers" wrote in message Hi Laurie,
Are you sure you aren't confusing dual processors with a dual core processor? A dual core processor, which is what I believe you have, is a single processor that can handle two threads simultaneously - essentially two processing units in one cpu. This is very different from a dual processor system which would have two distinct and separate cpu's. What model Viao is this? The specifications should tell us for certain.
-- Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP http://mvp.support.microsoft.com/ Windows help - www.rickrogers.org
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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It's one physical processor, with 2 cores, so it should show as one processor in the device manager and system info. to verify that it is actually using both cores, open the task manager and go to the performance tab. under cpu usage history, it should show two graphs, one for each core. the performance rating is based on actual performance, so if it is using both cores, it should be fairly accurate.
"Laurie Miles" wrote:

I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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:) Rick, to add to your pain, it is "core duo" not "duo core". Sorry, I couldn't resist.
"Rick Rogers" wrote in message

Crap, I didn't explain that very well, did I? Yes, a duo core is two functional cpu's on a single chip, not hyperthreading. What I was trying to convey (should'a thought more before sending) is that this "single" chip may show up as so in Device Manager. The OP was intimating that they had two physically separate cpu's, but in fact there is just one which contains two processing units on it. I was trying (poorly) to explain why only one would show up.
-- Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP http://mvp.support.microsoft.com/ Windows help - www.rickrogers.org
"Tom Scales" wrote in message Rick,
That's NOT what a dual core CPU is. You're confusing it with HyperThreading on a single core cpu.
Dual core is two physical CPUs on a single chip and should show up as two CPUs.
Although, in XP, so does Hyperthreading.
Tom "Rick Rogers" wrote in message Hi Laurie,
Are you sure you aren't confusing dual processors with a dual core processor? A dual core processor, which is what I believe you have, is a single processor that can handle two threads simultaneously - essentially two processing units in one cpu. This is very different from a dual processor system which would have two distinct and separate cpu's. What model Viao is this? The specifications should tell us for certain.
-- Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP http://mvp.support.microsoft.com/ Windows help - www.rickrogers.org
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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Grrrrrr! I have 2 Sony laptops not by choice, because they sold me a lemon; a VGN-S260 & a VGN-S360!!!! I should only have one. Sony isn't in my favorite lists of vendors, and they are not Vista capable.
"Laurie Miles" wrote in message

I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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"Laurie Miles" wrote in message

I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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Intel *DOES NOT* make dual core processors. They fuse two dingle cores together that can only communicate through the Northbridge chip (FSB). The process diagnostic will not recognize your "Core Duo" (notice the subtle play on words that Intel does) will only recognize one processor as it is not capable of independent threads as is the AMD Athlon X2 (which is a true dual core).
Bobby

Intel *DOES NOT* make dual core processors.

Gee - I'm running a D955EE which is a "Dual-Core", "Hyper-Threading" processor - shows up as 4 processors. Never say never - Intel does make "dual-core processors".
Larry
"NoNoBadDog!" wrote in message

"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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Intel *DOES NOT* make dual core processors. They fuse two dingle cores together that can only communicate through the Northbridge chip (FSB). The process diagnostic will not recognize your "Core Duo" (notice the subtle play on words that Intel does) will only recognize one processor as it is not capable of independent threads as is the AMD Athlon X2 (which is a true dual core).
Bobby

It is possible that you have one of the processors turned off in your Bios settings. I have a Pentium 4 with Hyper Threading and on Vista I have 2 cpu's showing in task manager as well as in device manager.
"Laurie Miles" wrote in message

I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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Just ignore him. He wanders into the Dell group occasionally with his 'AMD is better, Intel sucks' message. Most people have him killfiled as an AMD shill. "Lawrence E. Oliver" wrote in message

Intel *DOES NOT* make dual core processors.
Gee - I'm running a D955EE which is a "Dual-Core", "Hyper-Threading" processor - shows up as 4 processors. Never say never - Intel does make "dual-core processors".
Larry
"NoNoBadDog!" wrote in message
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
http://windowshelp.microsoft.com/communities/newsgroups/en-us/default.mspx?mid=4e4c6cbb-926a-4685-8616-ccddbbd21460&dg=microsoft.public.windows.vista.general
Intel *DOES NOT* make dual core processors. They fuse two dingle cores together that can only communicate through the Northbridge chip (FSB). The process diagnostic will not recognize your "Core Duo" (notice the subtle play on words that Intel does) will only recognize one processor as it is not capable of independent threads as is the AMD Athlon X2 (which is a true dual core).
Bobby

Thanks for all the replies so far. Firstly, I have a Core duo two core T2500 processor in my Vaio, which *showed* up in Win XP as two processors, and both processor instances could be viewed in Performance Monotor.
I have installed Vista onto a separate partition on the laptop, so can still boot into XP. Only one processor shows in Vista, as I mentioned before. BUT I have now found that only one processor is now showing in XP as well - the second processor is missing from multiple places that it could be viewed previously in XP. And if I type SET at the command prompt the Number_of_processors variable is set to 1.
There is no setting in the BIOS to turn off or on the second processor.
Vista appears to have disabled my second processor at boot time - the screen offering Vista or previous version of Windows starts up before anything else (after BIOS boot), and I suspect it is at this point that the second processor is disabled.
So install Vista, and lose your second processor! Great...
By the way, Laurie is short for Laurence (as in Olivier) - I'm male :-)
Laurie Miles
"Gary Mount" wrote:

It is possible that you have one of the processors turned off in your Bios settings. I have a Pentium 4 with Hyper Threading and on Vista I have 2 cpu's showing in task manager as well as in device manager.
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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The boot options screen is agnostic to this problem. It appears after the POST but before boot. For some reason you may need to re-install the cpu driver for XP. Then you need to find out if there is a cpu driver for Vista. In any case, you should explore the manufacturer's support website for your laptop. Vista shows my dual-core processor correctly and has not affected the view from my XP Pro x64, so my guess is that it is not simply Vista that is causing the issue.
"Laurie Miles" wrote in message

Thanks for all the replies so far. Firstly, I have a Core duo two core T2500 processor in my Vaio, which *showed* up in Win XP as two processors, and both processor instances could be viewed in Performance Monotor.
I have installed Vista onto a separate partition on the laptop, so can still boot into XP. Only one processor shows in Vista, as I mentioned before. BUT I have now found that only one processor is now showing in XP as well - the second processor is missing from multiple places that it could be viewed previously in XP. And if I type SET at the command prompt the Number_of_processors variable is set to 1.
There is no setting in the BIOS to turn off or on the second processor.
Vista appears to have disabled my second processor at boot time - the screen offering Vista or previous version of Windows starts up before anything else (after BIOS boot), and I suspect it is at this point that the second processor is disabled.
So install Vista, and lose your second processor! Great...
By the way, Laurie is short for Laurence (as in Olivier) - I'm male :-)
Laurie Miles
"Gary Mount" wrote:
It is possible that you have one of the processors turned off in your Bios settings. I have a Pentium 4 with Hyper Threading and on Vista I have 2 cpu's showing in task manager as well as in device manager.
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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AH - Thanks for the info. :-)
Larry
"Tom Scales" wrote in message

Just ignore him. He wanders into the Dell group occasionally with his 'AMD is better, Intel sucks' message. Most people have him killfiled as an AMD shill. "Lawrence E. Oliver" wrote in message Intel *DOES NOT* make dual core processors.
Gee - I'm running a D955EE which is a "Dual-Core", "Hyper-Threading" processor - shows up as 4 processors. Never say never - Intel does make "dual-core processors".
Larry
"NoNoBadDog!" wrote in message
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
http://windowshelp.microsoft.com/communities/newsgroups/en-us/default.mspx?mid=4e4c6cbb-926a-4685-8616-ccddbbd21460&dg=microsoft.public.windows.vista.general
Intel *DOES NOT* make dual core processors. They fuse two dingle cores together that can only communicate through the Northbridge chip (FSB). The process diagnostic will not recognize your "Core Duo" (notice the subtle play on words that Intel does) will only recognize one processor as it is not capable of independent threads as is the AMD Athlon X2 (which is a true dual core).
Bobby

I've found the best place to determine whether your second processor is working is to check Programs/Accessories/System/System Information - two processors should show there - and they were not showing on my Vaio.
I sorted the problem out eventually toda, in conjunction with Sony Support - but ended up doing a complete wipe and reinstall of my laptop back to WinXP in the process :-(
Although my BIOS did not have an option to turn off the second processor, somehow it was not working properly. Setting my BIOS back to its default settings worked. It seems that somehow Vista had screwed up the BIOS for my laptop - the dual processors were working fine before I installed Vista.
Anyway, I saw enough of Vista to let me know that this memory hog is not worth upgrading to - particularly with the UAC, which I had to disable to get an essential medical program to work.
Laurie Miles
"Colin Barnhorst" wrote:

The boot options screen is agnostic to this problem. It appears after the POST but before boot. For some reason you may need to re-install the cpu driver for XP. Then you need to find out if there is a cpu driver for Vista. In any case, you should explore the manufacturer's support website for your laptop. Vista shows my dual-core processor correctly and has not affected the view from my XP Pro x64, so my guess is that it is not simply Vista that is causing the issue.
"Laurie Miles" wrote in message Thanks for all the replies so far. Firstly, I have a Core duo two core T2500 processor in my Vaio, which *showed* up in Win XP as two processors, and both processor instances could be viewed in Performance Monotor.
I have installed Vista onto a separate partition on the laptop, so can still boot into XP. Only one processor shows in Vista, as I mentioned before. BUT I have now found that only one processor is now showing in XP as well - the second processor is missing from multiple places that it could be viewed previously in XP. And if I type SET at the command prompt the Number_of_processors variable is set to 1.
There is no setting in the BIOS to turn off or on the second processor.
Vista appears to have disabled my second processor at boot time - the screen offering Vista or previous version of Windows starts up before anything else (after BIOS boot), and I suspect it is at this point that the second processor is disabled.
So install Vista, and lose your second processor! Great...
By the way, Laurie is short for Laurence (as in Olivier) - I'm male :-)
Laurie Miles
"Gary Mount" wrote:
It is possible that you have one of the processors turned off in your Bios settings. I have a Pentium 4 with Hyper Threading and on Vista I have 2 cpu's showing in task manager as well as in device manager.
"Laurie Miles" wrote in message I have a Vaio laptop with T2500 Core Duo processor - in other words, it has two processors. I note that someone else on this list has posted about performance being low with this processor - and I think it is because Vista is not picking up the second processor. There is only one processor instance in the Performance Diagnostic Console, and System Info shows only one processor.
A pretty big error...
Laurie Miles
---------------- This post is a suggestion for Microsoft, and Microsoft responds to the suggestions with the most votes. To vote for this suggestion, click the "I Agree" button in the message pane. If you do not see the button, follow this link to open the suggestion in the Microsoft Web-based Newsreader and then click "I Agree" in the message pane.
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