Originally posted by: ElTorrente
I'm thinking that it is simply a software thing that is not showing the proper voltage.
When I was messing around with overclocking, the effects of stepping up voltages by .125 (or whatever the increments are) worked as I expected - although ASUS probe would only show 1.388, or 1.4.
In other words, I would increase speed and fail Prime95. I would then increase voltage by .125, and Prime95 would pass and I'd be stable at that given speed. The whole time, though, the voltage reading in Asus Probe would read the exact same thing. No big deal- I know what I set in bios, and those settings had real effects in my setup and I knew they were/are working.
I thought you were right about this. I too noticed some stability improvements as I made my way up the vcore increments. However, there is definitely a problem. Take a look at this chart:
First is the vcore setting in the BIOS. Next is the vcore reported by the hardware monitor in the BIOS after a restart. The next data entry is which reading is favored where the reading fluctuates (or, in other words, if the reading fluctuates between 1.40 and 1.42, which one is more prevalent). Finally, any comments or notes from me.
1.3625 = 1.37 (Solid)
1.3750 = 1.39 (Solid)
1.3875 = 1.39 (Solid)
1.4000 = 1.39-1.40 (1.40 heavily favored)
1.4125 = 1.40-1.42 (1.40 mildly favored)
1.4250 = 1.39-1.40 (1.40 heavily favored Note that this is a move downward.)
1.4375 = 1.40-1.42 (Evenly split)
1.4500 = 1.40 (Solid)
1.4625 = 1.40-1.42 (Evenly Split)
1.4750 = 1.50-1.52 (1.5 heavily favored) (
JUMP FROM 1.42 to 1.5!) (6c increase in load temps!)
1.4875 = 1.52 (Solid)
1.5000 = 1.52-1.53 (152 mildly favored)
Now, we could still think that the big jump there from 1.42 reported ot 1.5 reported was just a measurement abberation. But, that jump also coincides with a two degree increase (c) idle temperatures as well as a six degree increase in load temperatures. So, the the voltage
is drastically increasing out of step with the small increment indicated. Which is a shame because I had worked my way up to just that point, and only need one or two more increments to get my OC stable. But, when I go from 1.4625 to 1.4750, I get a lot more of a vcore increase than I wanted, and an unacceptable spike in temperatures.
By the way, it seems (so far) that this only affects X2 processors. Yet, oddly, while many are reporting the bug, a few are saying they are totally unaffected. I used to think I was unaffected. But, after going through each vcore settings to make that chart, I realize that I am.
Anyways, here's my specs:
X2 4400+ Toledo @ 2.5GHz (1.4375v) (250x10) | Thermalright XP-90C w/ Panaflo 92mm FBA09A12M1A (48cfm 2450rpm) w/ AS5 - Load Temp: 47c @ 75f ambient | Asus A8N-SLI Premium (rev 1.02) (BIOS 1005) (HT-Bus 4x250) | 2GB Corsair TWINX2048-3200C2 2-3-3-6-1T 416DDR 5:6 divider @ 2.7v | NVIDIA 7800GTX (MSI)
I also just updated to the final release 1007 BIOS. It had absolutely no effect.
H