View Full Version : Voltages and stability
05-09-05, 09:09 PM
Most people have problems when their voltages run too low. I'm worried mine are running too high.
With my previous mobo, an A7N8X, I taxed the +3.3/5 lines heavily because it used those to power the CPU, and adjusted the rails manually based on idle load to the +5% limit. Now I use a DFI which has an ATX12V connector so my system is taxed much less. I glanced at MBM and it showed abnormally high voltages. Breaking out my DMM and testing at the 20pin molex, I get these results:
I'm wondering if my +5 could be causing some issues with overall system stability as I have random lockups and reboots quite often. I'm thinking I should lower it just to be safe, to the 5.2-5.25 range.
my +5 rail always between 5.08 ~ 5.10V, try to keep it lower and see if your system still reboots, also check your overclocking too
05-10-05, 06:17 PM
I've been running below max OC for a while, playing with different settings to see if I could acheive system stability. Took the +5 do 5.2-5.25, I'll report if I get the same results.
05-10-05, 09:23 PM
Hmm, I have my Fortron 530w adjusted with a DMM:
Running my P4 3.2E @ 4.4Ghz prommy cooled on a P4C800 Deluxe. Not 1 single problem. I've been running it like this for ages.
I also have a modded Enermax 465w on my DFI NF3 UT 250GB with rails @:
Not 1 single problem here. Have you added any new hardware?
05-10-05, 11:34 PM
Nothing that would cause problems. Replaced the Ti4600 with a 5700Ultra which seems to dissipate much less heat than the GF4. Other than that, no.
05-11-05, 11:08 AM
Hmmm, Ok have you tried swapping psu's? Could be the psu itself is running out of steam trying to keep up. My 365w enermax's 3.3v rail just took a dump down to 3.12v. This is even afer i modded it to run 3.45v with a VR.I have no clue why, but my guess is one of the components inside failed. Even tho the psu powers up normally, with a DMM my 3.3v rail is history. My 5v and 12v rails are normal.
Most likely 1 or more of the psu's components is failing, even tho it reads ok with the DMM.
05-11-05, 11:23 AM
Nope, nothing changed. I've had a failed PSU before, and it started losing regulation over voltages, swinging a half volt at a time. It took my ram with it.
I've been having mainboard incompatibility issues between my XP-M and the mobo for over a month now.
05-11-05, 03:25 PM
Ahhhh. Well I hope you don't get one of those failures again. Sry I can't be more help.
i would check your mobo visually for bad capacitors, they should be flat at the top and not bulged or leaking.
05-12-05, 04:10 PM
No bad caps here. This mainboard has a known incompatibility with XP Mobile as a result of a non-optimized bios as far as I can tell, which is the root of the problem.
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