I build a new system with 4 CPU Quad core... for a total of 16 core. In the system manager I see windows 7 detect all my 16 processor but when I got to Task manager I only see 8 square (one for each core). I installed PRO TOOLS yesterday wich is a program for audio and I can choose the amount of core I would like to assing to this application and I can only choose 1 to 8 ... so my computer is probably working only Half of his capacity. I checked in the BIOS but I did not found anything to fix this problem. I do have ONE GRAPH PER CPU checked in the task manager.
Any help ?!
Thank you very much and sorry my english is not perfect... I hope i'm clear enough...
My Config :
Tyan Thunder n4250QE (S4985)
4 X Opteron 8147 HE
24 gb of ram DDR2
Windows 7 Ultimate x64
what version of windows 7? I believe there is a cap on how many processors it can detect if you don't have the ultimate version, and I think even ultimate is limited to 2 and when you are on 4 they want you to fork out cash for enterprise editions
Oh I did not mentionned... I am running Windows 7 Ultimate x64 bits and it's up to date... let me add this citation : " Windows 7. The new OS can support up to 256 cores, versus 64 in Vista " ... 16 is not supposed to be a problem... else they gonna have some problems in the next few years lol. but many thanks for you fast reply !
you sure about that ? the 256 core limitation make no sense if this it limited to 2 physical CPU ... and windows 7 do detect my 16 cores they are all listed in the system manager... they just don't appear in task manager and software I want to use.... :S
I have read a litle bit about the subject since your last answer and I have found this : “The 64-bit versions of Windows 7 and Windows Server 2008 R2 support more than 64 Logical Processors (LP) on a single computer,” Phil Pennington, Windows Server Technical Evangelism, revealed. “New processors are now appearing that leverage non-uniform memory access (NUMA) architectures. Within the near future, a system with 4 CPU sockets, 8 processor-cores per socket, and with Simultaneious Multi-Threading (SMT) enabled per core, will achieve 64 Logical Processors. Many server-class solutions will need to be architected with NUMA awareness in order to achieve linear performance scaling on 64+ LP systems.”
windows gimp their consumer windows 7 so that people have to fork out larger amoutn of cash and support fees for server 2008
they support logical cores (multi core) up to 256, but 4 socket typically is not a workstation and is more of a server so they decided that was the limit for consumer windows (same with xp pro and vista ultimate i think)
Have you tried maximizing the task manager window? At the default size there's not that much room to display even 8 cores, and it's possible that it just won't show any more unless the window is enlarged.
It's also possible that task manager will never show more than 8 cores - has anyone with enough cores actually seen more?