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CPU Upgrade Question, Part #'s

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Upgrading my...


Asus M3A78 Motherboard - CPU Support list here: CPU SUPPORT LIST

from an AMD Phenom 9950 x4 @ 2.6 Ghz (140w)

to another CPU I would like to know if this chip will work:

Phenom 955


What's throwing me off is the model # the CPU SUPPORT LIST says:

Motherboard Supports: HDZ955FBK4DGI

The chip in the link says its a: HDZ955FBK4DGM

but they are the "same chip" Im guessing one is BE and one is NOT?

Last Letters are different... will this matter?

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found this:

As mentioned above, the 955 is only Black Edition (BE). What differs however is the revision, or stepping of the chip. Most places will stock the latest revision of it, look for OPN: HDZ955FBK4DGM. The M denotes C3 stepping.

A comparison between the different 955s:

955 X4 C2 Revision (HDZ955FBK4DGI)
- Voltages: 0.875-1.5V

955 X4 C3 Revision (HDX955FBK4DGM)
- Voltages: 0.850-1.40V

955 X4 C3 Revision (HDZ955FBK4DGM)
- Voltages: 0.825-1.425V

As a side note, the model I received from MSY Brendale last week was HDZ955FBK4DGM, this is what you'll most likely receive too.
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CPUs Master
Motherboard Authority

It can handle the wattage and recognizes 4-core phenom II chips.

I would buy the chip with confidence. Worst case scenario, you will need to use an offset voltage setting to get your vcore where you want it but that's no big deal really. (May need a BIOS update IF there were older versions that didn't recognize the phenom II's and you have one of said older versions)

Z1NONLY said:
It can handle the wattage and recognizes 4-core phenom II chips.

I would buy the chip with confidence. Worst case scenario, you will need to use an offset voltage setting to get your vcore where you want it but that's no big deal really. (May need a BIOS update IF there were older versions that didn't recognize the phenom II's and you have one of said older versions)



Yes sir, already updated the bios :)  I do have a problem with that... My DDR2 1066 only runs at 800 now.. I set it manually like usual, but Im under the impression I will have to go in and manually set the timings to the right configuration...

I attempted to do this... set it to "5-7-7-20" from "5-5-5-15" but when I got in there... there was about 20 ram timings.. So I'll leave it alone for now. until my chip arrives that is :p  I do have the ability to set the ram timings and set the others to auto.. just don't know which ones to change.. and which ones to set to auto..
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