Hello all, i have a random problem thats been driving me crazy for last several months. PC has run great for last 3y then this started.. when i'm gaming (world of warcraft) my PC will randomly hard lock. and i have to hard boot it. had this issue for a while then a couple weeks ago PC rebooted on it's own. that issue i found 24 Pin from Psu to MB melted @ extension cable. after replacing that cable & removing extension i checked my PSU voltage w/ my multi meter i refired up PC.  hoping all issues solved. 1 day everything was great no issues then 2nd day & since, my luck, PC still hard locks when gaming. so i started to look @ other options. removed my silverstone st1500 PSU and replaced it is a 850w PSU i had to test. same issue w/ that PSU. so this morning i reconnected my ST1500. planing on running some stress tests tonight whenn i get home
 
i'm having a brain fart was looking at specs for my GPU's and PSU and wondering is i have a issue w/ power all of the sudden now. i have 3 - GTX-580 hydro copper II (3gb) that looks like power draw is 42a my ST1500 is 25a / rail. originaly i had (what i thought was) 3 of 8-pin rails and 3 of 6-pin rails to my GPU. so i would be @ 50a / card. but after looking some. looks like on that PSU 3 6-pin i used shared a single 25a rail. i thought about just using 1 8-pin to 8pin & 6 pin PCI connector / gpu but worried since they are 25a rail and GPU needs 42a would be too much.
 
i maybe over thinking this. but like i said this issue been driving me crazy for last several months (I HATE random issues that i can't trace)
 
here's some info on my PC:
PSU: ST1500
CPU: 2600k
MOBO: Z68-FTW
GPU: 3 - GTX-580 Hydro Copper II (3bg)
16gb Ram
1 SSD for OS
1 SSD Games
1 HDD Games/Music
 
water cooled CPU & GPU's... Loop = Res > Pump > Gpu1 > Gpu2 > Gpu 3> rad (6 fans) > CPU > Rad 6 fans > Res
 

i was planing on doing tests & stress tests starting tonight. though when i did them about a month ago everything passed.  and this issue only seems to happen playing Warcraft.. havent really tested on other games since mainly play that one. but when listening to music, youtube etc (hours on end) no locking up.
 
figure i'll run prime95, Memtest, then some GPU benchmarks.
 
just didn't know if anyone had a ST1500 PSU and  multugtx-580 cards how they had power ran for them. going to try the benchmarks & testing w/ just 1 cable to each card (8pin from PSU to 8pin & 6pin GPU)
 
forgot to add i am in surround mode on 3 monitors

originally thats what i did w/ my cards.. but then looking @ my PSU they all didn't have seperate rails.
 
here's how my ST1500 PSU rails are set. 8 rails @ 25amp each:
12v1: CPU1 - 8-pin 
12v2: CPU2 - 8-pin
12v3: Mobo - 24-pin
12v3: IDE/Sata - 6-pin
12v4: IDE/Sata - 6-pin
12v4: IDE/Sata - 6-pin
12v4: IDE/Sata - 6-pin
12v5: PCI - 8-pin
12v6: PCI - 8-pin
12v7: PCI - 8-pin
12v7: PCI - 8-pin
12v8: PCI - 8-pin
 
last night i ran Memtest86+ on each stick of ram. all passed.
 
this morning i got up early and did a S.T.A.L.K.E.R. benchmark on GPU's. did each on their own then did all 3 in SLI. took a hour+ to complete. nothing shut down or locked up.
it tested 4 different setting on game.. day, night, rain, sunshades. 1920x1080
 
average max FPS
GPU 1 - 203
GPU 2 - 200
GPU 3 - 196
All 3 - 199
All 3 everything maxed (6032x1080) - 162

you have 3 cards sli . try this seting open the n vida thingy set 2 cards sli an deadicate 1 to physix on the bottom . im thinking the sli 3 way is cousing this problem as i have 3 gtx 470 cards on a 200 classified p55 bord took many reformats chasing this bug for overly 5 months . all the times i have asked for help they have given me somthing to test out on the rig thoe the latest reformat i deaded out 1 card took the sli 2 way an dont crash in tera or counterstike stable as of now gaming wise . the error messages i got wer from windows live an the games doing kernel events .... i also stped temp like lol on the percision x an havent stuck in any fan programs this last go around . loading in softwear slowly tell i get hit again by black screen an sound resets . full 347.09 didnt pick or chose just hit the full install .
 
no crashes thoe i know my stats suck tell i get a 3 way solid config .

it's just crazy worked great for 3 years then out of blue this happened.. love hunting these issues..and people wonder why i drink....LOL

jaydogg76

Sajin
Maximum graphics card power for a 580 is 244w/12 = 20a each. Each rail on your PSU can output a max of 30a.
 
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-580/specifications
http://www.silverstonetek.com/downloads/Manual/power/EN-ST1500-Manual.pdf

http://www.evga.com/products/pdf/03G-P3-1591.pdf  i have the hydro copper 2 (3GB version)
maybe i was reading it wrong under requirements . min of 42 amps on 12v rail

Your PSU has a max combined load of 110A on the 12v rail.

was making sure bc i even called and was told 42a per card...thought that was real high.... guess tonight i'll run prime95 for several hours to see what happens.
 
then 2mar maybe flush water loop make sure things are clean, maybe another video benchmark then if i still have same issue idk what i'm going to do. unless there are any other tests i should try 

Just ran heaven benchmark on each card then in SLI no hard locks, Also ran 3dmark11 on all 3 then in sli. no lock ups... though i did notice my display on my z68 ftw show temp about 71 on last one... since i have basic edition i was only running benchmarks on 1 monitor not on all 3 like when i game. next step is i guess flush my cooling system...maybe my pump is starting to fail

well decided to try world of warcraft... played for about 10m then PC hardlocked... Had my HWmonitor running ... and if correct CPU temp max 48.... all 3 GPUs 39...
 
checked event log and got event ID 41. Kernel-Power 

going to try to run WoW on 1 screen this morning w/ no-addons... hell today i may fire up battlefield 3 and other games to see if any issues there as well... 

forgot to add did notice a couple strange things w/ video/game a couple times on WoW. when in game no matter where i clicked took me out to windows and graffix looked funny like was trying showing up as lower display... almost like true color compaired to evga.  also one time color was off and there were horizontal lines. that only happened when i was on 1 monitor. and didn't get anything like that when on BF3 
 
btw still get Kernel-power 41 as error when hardlocking in event log

i did multiple benchmarks on each card independently ....they all did about the same...no lock ups nada. did it on all 3 in SLI no issues or lockups. but then again w/ all 3 benchmarks only let me do it on 1 screen.... i have AvP benchmark that i think will go on all 3 need to try that one.
 
open to sugestions how to test cards further or other benchmarks to try. i used heaven & 3dmark11

jaydogg76
forgot to add did notice a couple strange things w/ video/game a couple times on WoW. when in game no matter where i clicked took me out to windows and graffix looked funny like was trying showing up as lower display... almost like true color compaired to evga.  also one time color was off and there were horizontal lines. that only happened when i was on 1 monitor. and didn't get anything like that when on BF3 
 
btw still get Kernel-power 41 as error when hardlocking in event log

Have you tried using 1 or 2 of the molex splitter plugs that came with your graphics cards? That will help you take advantage of more of the rails on your psu and may solve your problems.

/sigh still messing w/ my PC trying to find my issue for it randomly hardlocking.... repair place found nothing wrong..... over last several weeks re-tested everything (GPU, CPU, Ram, etc) all tests fine even ran prime95 w/ heaven & same time no issues.....i also lowered quality in WoW from ultra to recomended which alot are High now
 
then as i was playing Warcraft i saw a breif flicker before computer screens went black saying no-video then hardlocking..... said a issue w/ Nvidia Driver. so i've been rolling back drivers doing a clean install each time. yet i still have same issue. i see more and more people are having same issue as i am now. some said rool way back to like 314......i don't know what to do so pissed @ random error i did someting i havent done in forever i bought a consul system just to play games....
 
going to double check and make sure all my HD drivers for cards are gone... but idk..

My GTX 580 did the same thing on WoW. I fixed it by downloading something like EVGA Precision or MSI Afterburner and kicking up the voltage a notch or two. After the GPU got the power it needed, it quit locking up.