ASUS P5B-Deluxe; Problems & Fixes

[Roger_D25]

Messiah Khan,
Wow so your topping out at only 340Mhz on the FSB, that is very low! This leads me to think that something is definetly going on, especially since your board refuses to post after that point? I imagine you have tested some of your other hardware like (PSU, graphics card, etc..) to make sure their not causing the problems? By the way what processor are you running, if your running a quad core than 340FSB is much more resonable but if your running a regular C2D than something is going on?

On a separate note I recently purchased a used P5B-Deluxe motherboard here at XS Forums that might replace my eVGA 680i depending on how comfortable I get with it and how the performance is after testing. Although I love the board, the low voltage capability of the board along with the nasty CPU vdroop makes testing difficult once you really start to push things.

Anyway I decided to grow some balls and try the vdroop pencil mod (although I'm not an expert I have done both solder/solderless mods in the past). Well after reading through some theads I went for it. Fortunetly I have a very nice DMM which increased the safety factor greatly! The vdroop resistor measured 80.2OkOhms before modding. I dropped the resistance down to 25.01kohms using an HB pencil and my vdroop pretty much went away!

I should add that I only tested with voltage values in BIOS set to 1.45v, there is a good chance that if you run more or less voltage in BIOS that your results will differ? From my testing I would imagine that the lower the VCORE value you set in BIOS the less vdroop you'll measure, and visa-versa with higher VCORE values.

Pre-Pencil Mod:
VCORE (BIOS Setting): 1.45v
Actual Idle VCORE: 1.422v-1.416v
Actual Load VCORE: 1.397v-1.394v (Orthos Small-FFT)

Post-Pencil Mod:
VCORE (BIOS Setting): 1.45v
Actual Idle VCORE: 1.449v-1.447v
Actual Load VCORE: 1.448v-1.444v

(alright the CPU Vdroop isn't completly gone but those results are just amazing as far as I'm concerned, especially for about 10min modding time)! So thank you very much guys)! Here is the link to the pencil mod I used and I think that this might be the same one that dnottis used ju stin but I'm not sure?

http://www.xtremesystems.org/forums/...2&postcount=17