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 Post subject: Limit CPUID MaxVal
PostPosted: Sun May 06, 2012 9:17 am 
8086
8086

Joined: Sun May 06, 2012 8:44 am
Posts: 6
I was going through my Phoenix BIOS and found that I can change the "Limit CPUID MaxVal" from disabled to enabled. I know that in older OS's such as XP it should remain disabled.
I am running Windows 7 Ultimate (x86) with a P4 Proc w/ HTT.

The Specs of the proc (through Everest Home Edition) are:

CPU Type: Intel Pentium 4, 3066Mhz (23 x 133)
CPU Alias: Prescott
CPU Stepping: G1
Instruction Set: x86, x86-64, MMX, SSE, SSE2, SSE3
Original Clock: 3066 MHz
Min/Max CPU Multiplier: 14x/23x
Engineering Sample: No
L1 Trace Cache: 12k instructions
L1 Data Cache: 16KB
L2 Cache: 1MB (On-Die, ECC, ATC, Full-Speed
Motherboard ID: 0EM00000 PROD00000000
CPU #0: Intel Pentium 4 CPU 3.06 GHz, 3066 MHz
CPU #1: Intel Pentium 4 CPU 3.06 GHz, 3066 MHz

This is in an Acer Power FH.

I'm wondering if it would make a difference to enable the "Limit CPUID MaxVal" ?


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 Post subject: Re: Limit CPUID MaxVal
PostPosted: Mon May 07, 2012 9:50 am 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5081
One of the first things on boot is polling the processor for it's CPUID value. This is probably to let the OS scheduler figure out how to handle the processor best. If you leave it enabled, you won't be able to use the full capabilities of the processor.


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 Post subject: Re: Limit CPUID MaxVal
PostPosted: Mon May 07, 2012 10:32 am 
8086
8086

Joined: Sun May 06, 2012 8:44 am
Posts: 6
LatiosXT wrote:
One of the first things on boot is polling the processor for it's CPUID value. This is probably to let the OS scheduler figure out how to handle the processor best. If you leave it enabled, you won't be able to use the full capabilities of the processor.



Glad to know that. Thank you!!


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