Ive had alot of trouble with my new am2+ system. First i got a new board and cpu and it solved my first problems. But now it started to crap out on me again...

I tried benching some today and tried to get 3.9ghz benchable as ive benched before. After alot of tries i gave up since it always bsoded me in first test in 3dmark06. The highest vcore i gave it then was 1.52v. The sweet spot seemed to be around 1.5v, if i had lower it would instantly reboot when loading vista and the same with 1.52v. But if i used 1.5v i could run wprime and fiddle around in vista but i couldnt complete first test in 3dmark06. The highest temp i saw when running wprime was 48C. Last time when i used same settings and cooler but only 1fan i had full load temps at about 53C. And i have a better mount and another fan now so temps was lower than last time.

Well after about 1h of trying diffrent settings the computer started to suddenly shut down after i saved bios settings. First i saved bios changes then screen goes black as usual as it starts to load everything but then it just shuts down. I cant power it on with the power button so i have to remove power cord and w8 for 10-15s and then insert it again and it runs smooth. That happend to me 3-5times. So i reverted all the settings to my stable max oc (3.7ghz 1.47v) and now my temps is all screwed, it shows -236C in AOD and -1C in blackbox...

Worth mentioning is that my computer has been on for about 16h a day running seti@home on cpu and gpu. Although then ive been running cpu on 3.4ghz with +0.025V over stock.

It still runs prime at 3.7ghz 1.47v as it did before. Im using a Thermalright extreme 120 with 2x120mm fans on it atm. What have happend really?

My system:
Phenom II 940 0852EPMW (Could be a 0850)
Gigabyte 790X-UD4 With newest bios
2x512mb kingston pc8500
gigabyte gtx 260
Random 620w psu

If you have a spare PSU ,, try it. Thats the first thing id suspect if the temps are good. second is the Mobo(the chipset and or Power department

PWM ,, phets,,AND OR psu could be weak from heat after High clock for so many hours straight...

Seti At home,,,,,,, for 16hours a day is a lot of work for the Mobo and CPU @ 3.9ghz. Especially with under 700watts . Remeber these chips still are High TDP once the Oc starts climbing..

Yeah a new psu will be my next purchase. Well i ran it at 3.4ghz with 0.025v over stock for 16h a day.

But how can my temp probes just stopped working? Ive read that they start bugging when going subzero but im just on a regular air cooler:P

But are the mb's so poorly built that they cant handle the load or whats up with the pwms?

IMO, the 940 will not do more than 4Ghz stable on air or even water - mine benches up to 3.8 but only stable at 3.6 ............

Ive never tried more than 3.9ghz. But its stable at 3.7-3.8ghz with 1.47v and then i cant even bench 3dmark06 at 3.9

But my main question now is what happend to my temp probes? And why did it shut down as it did?

Just passed cinbench at 3.8ghz. Tried 3dmark06 after that and it crashed in the first SM3.0 test about halfway into it. Gave me a bsod saying "apx/apc missmatch" well atleast something like that..

I'm going to say that's your issue. I had a similar problem with an old rig of mine. Replaced the PSU with a good one and all the BSODs and weirdness went away.

Okey, yeah its on my to do list But wierd bsods i can blame the psu but how about that it doesnt boot and just shuts off? Read some about it in a dfi thread and there it was the pwm that was broken:/

Just try to re-flash your bios, it might bring the temp sensors back to live.

Okey will do. But he temp sensors didnt dissapear after the flash, it was 1week later. Apparently some more ppl have that problem and then they just pop back. But i will try bios update again.

Snowman89, I've had temp sensors go out when the heatsink is too tight. Then again, the TRUE isn't usually tight on the motherboard either.
If my temp sensors ever went out before, I just loosened the heatsink a tad, and they came back. (My system was also unstable...)

Thats probalby TRUE () Will try a remount tomorrow

the psu man, the psu!!!

Yeah its probably the reason of some of my bsods but it shouldnt make it not post. Someone must have had the same problem with it shutting down and have to remove power to get it to boot again, or?

PSU can cause that as well.

Now i got even more problems with my rigg... Out of nowhere it just refuses to post when its been off for a while. Fans spin up as they should and then nothing more. A cmos resett solves it and its running again. Then the same thing again when its been off for a couple of hours..

Whats wrong my with rigg?..

NB frequency too high? Not enough Volt on the ram? Overclocked too high?

Or HT too high?

thinkin that too here , as i learned thats what was wrong with my pc...then I learned

Still playing with the multipliers here.

I have seen numerous 940 chips at 4ghz & 4.2ghz but not more stable

It was at 3.2ghz stock nb and stock ht

Running everything stock now so will see what happends

What chips do you have on that Kingston ram?

If it's Micron D9 it could easily be the ram causing the coldboot issue's. I had to fight that problem every single boot with my Cellshock ram (D9), since changing over to OCZ Platinum and OCZ Blade it's gone-- boots every time.

Iam running one stick of ocz reaper now Changed it since it sucks to run vista and games with 2x512mb ram. 1x2gb is way better

Have you changed your PSU yet?

psu,had the same problem with DFI and apevia PSU. If you dont turn off the psu
it wont restart till you pull the power cable for 15 minutes,or reset cmos. Psu worked great with biostar but not DFI ultra d

Nope, cant afford it atm. Although i saw something interesting today. When i run OCCT on cpu no voltages fluctate any, but when i run it on gpu the 12v goes from 12.2v to 11.85-11.70 So what psu should i get? I will be running 2x 4770 and phenom II 940 on that rigg

This one http://www.newegg.com/Product/Produc...82E16817171037