Ned Help With AMD X4 955 Build

[mstomaso]

I think I'm missing something obvious. I just built a system with a Phenom II X4 955 processor on an Asus M4A79 XTD EVO motherboard. When I run PC Wizard, it tells me one CPU is enabled. I then run AMD overdrive and it shows three of the CPUs grayed out. What am I doing wrong?

 

[Pederv]

A BIOS upgrade?

Maybe it's a C3 955 and the motherboard doesn't recognize it.

 

[mstomaso]

I downloaded the new bios earlier today, no change.

 

[GaiaHunter]

According to this, C3 stepping is only supported since PCB 1.01G. What is your motherboard revision? And what is the stepping of your CPU?

http://www.asus.com/product.aspx?P_ID=vk9Pqxby9MjO0WHm&templete=2

 

[mstomaso]

Board rev is 1.02G. Stepping is RB-C2. BIOS is 0605

 

[nyker96]

try to uninstall any cpu related driver in windows and start win up again, sometimes when you upgrade cpu, the windows driver needs a refresh.

 

[lopri]

Task manager shows only one CPU as well? I had a similar issue when I got my 955 BE. In my case I had only one core running at normal speed and the other three were running with x4 multiplier. Updated BIOS fixed it.

 

[mstomaso]

Task manager only shows one processor. I deleted the AMD drivers and restarted windows. That did not work. The notes for the AMD drivers say Cool n Quiet is needed for the drivers to work. I have scoured the AMD site looking for Cool n Quiet drivers for XP and I cannot find them anywhere. A search at Microsoft turned up nothing.

 

[thilanliyan]

That's a pain in the butt. I looked at the CPU support list for my Gigabyte DS4H and that only supports up to the C2 stepping for the 955/965.

Is there any technical reason these motherboards can't support the C3 stepping?

EDIT: The C3 and C2 stepping 955 are supported by all PCB versions of your motherboard:
http://support.asus.com.tw/cpusupport/cpusupport.aspx?model=M4A79T%20Deluxe

 

[M YANCEY]

What OS are you running?

 

[mstomaso]

Windows XP SP3.

 

[mstomaso]

I'm pretty sure it's my Windows XP installation. I can only select the "standard PC" HAL, which is a single processor configuration. I cannot figure out how to add HAL profiles so I can use halmacpi.dll. Looks like I'll have to upgrade to Windows 7 after all.

 

[mstomaso]

The problem is known, and a "fix" can be found here:

http://www.handaware.com/multiprocessor_XP.html

I'm going to install Win 7 instead.

Thanks to all for the help.