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Hi,
This question might be very basic. But i want to know How many processors does Windows 7 support.

Any link to Microsoft site will be appreciated.

Regards,
Prafulla Vedante
Posted 26-Jul-11 21:13pm
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Solution 1

All 32-bit versions of Windows 7 can support up to 32 processor cores, while 64‑bit versions can support up to 256 processor cores.

http://windows.microsoft.com/en-US/windows7/products/system-requirements[^]
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Comments
PrafullaVedante 27-Jul-11 6:41am
   
I have installed Windows 7 on my machine with two quad core processors. Ideally it should show 8 processors in the task manager performance tab. But it is showing only 2.

Why is it so ??
Kim Togo 27-Jul-11 7:08am
   
Perhaps you have to "enable" all cores or "Hyper-threading/cores" in the BIOS ?
PrafullaVedante 27-Jul-11 8:01am
   
How to do this ?
Kim Togo 27-Jul-11 8:03am
   
Reboot your computer and enter BIOS (press DEL or F12) and look and search for something that has to do with CPU/Cores/Hyper-threading etc.

But it ALL depends on what type of computer/manufacturer you have.
SAKryukov 28-Jul-11 2:17am
   
My 5.
--SA
Kim Togo 28-Jul-11 2:21am
   
Thanks SA
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Solution 2

*This answer given under the assumption of a programming context*

I would like to add something to Kim Togo's statement.

In C# programming, and presumably the .Net framework, process affinity is stored in an IntPtr value, and, unless I'm mistaken, that is 64 bits. (Each bit represents whether or not the process is allowed to run on a certain processor.) So, this would imply that the maximum supported processors of the .Net framework is 64.

Even if Windows supports 256 processors, almost certainly there are frameworks (besides .Net) that only support less.
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