Sudden reboots when gaming on new computer :(

Associate
Joined
8 Jun 2011
Posts
2
Hey all, i ordered some parts from overclockers.co.uk there last week so i could finally start playing modern games
but i've been having a serious problem ever since setting everything up yesterday and i was hoping someone would be
kind enough to help me.


Components i ordered were:
Asus GeForce GTX 560 1024MB GDDR5 PCI-Express
Intel Core i5-2300 2.80GHz (Sandybridge) Socket LGA1155 Processor
Gigabyte P67A-UD3-B3 Intel P67 Chipset (Socket 1155) DDR3 Motherboard
8gb (2x4gb) Corsair XMS3 DDR3
OcUK Battle (powercool) 650W Dual Rail High Efficiency Modular Power Supply
Akasa AK-CCX-4002HP Venom CPU Cooler (Socket LGA775/LGA1155/LGA1156/LGA1366/AM2/AM3)
OcUK Avenger Gaming Midi Tower Case

Additional info:
Clean Windows 7 64bit Installation
All Latest Drivers
GPU is at stock settings, temp idles at about 29 and GPU-Z says it maxes out at 63 when running it through the mill.
While running prime95 my processor temps peak at:
core 0 - 44c
core 1 - 49c
core 2 - 45c
core 3 - 48c


As i said i just put the rig together yesterday, after installing all drivers etc..
I started taking a look at the fancy screensavers on the nvidia geforce site just to be gratuitous.
Got about 2min into the train screensaver when my screen went black and sound started stuttering/looping
until the computer just rebooted a few seconds later...

Thats when i thought something was fishy and decided to start playing some games with extreme graphics
settings to see if it was an isolated incident with the screensaver.
Played a good bit of portal 2 and left4dead 2... not a hitch... things were looking good...
Played Civ5 for less than 20min and the computer suddenly rebooted again in a similar fashion.
Tried twice more with the same result.

After each reboot asus smartdoctor said my card was fine and temps were still never unusually high.
So looking for the cause i ran memtest, no errors...
Downloaded and installed 3dmark 2011 and bam...
as soon as the deepsea demo finishes loading it happens... sudden reboot.. i dont even get to see the first frame.
If i choose benchmarks only, it loads and i get about half a second of the first benchmark before the same happens again.
This happens consistently and i've no idea where to go from here.

Grasping at straws i'm even beginning to wonder if i hooked up the 6pin pci-e from psu to graphics card correctly,
because the modular cables the psu came with seem stupidly baffling to me...
On the psu there are 2 ports marked pci-e 6pin... and 2 ports marked pci-e 8pin...
But the 6pin ports are completely useless with what comes in the box...
there are only two pci-e cables and theyre both of the 8pin to 6+2pin variety...
which means you either have to use the 8pin in the pcie8pin port and then use the 6 pins on the other end on the graphics card
(what im currently doing... since it was the ONLY option i assumed it was what was intended)
If you want to use the pci-e 6pin port on the psu with the cables supplied you'd be left with an 8pin connector on the other side -.-

Anyhow this probably has nothing got to do with it i just thought id throw it in there to give as much relevant info as possible.
Should probably also mention that once or twice right when the 3dmark11 deepsea demo finished loading and it crashed it sounded like a
fan inside the case went into overdrive and got really loud... which i think could only be the gpu fan... this extra confuses me because it
crashes when it finishes loading and before any rendered frames appear on screen.. so why would the gpu fan start whirring like that?

The locking up and rebooting with train demo and 3dmark11 happens with some slight variations...
During train demo the computer completely locked up and monitor lost signal... but the music continued to play without hitches for about 30 seconds before it changed

to a buzzing and the computer rebooted by itself...

Feedback/buzzing noise through speakers happens a lot when monitor signal is lost and the comp locks up... mostly it reboots by itself but sometimes i need to hit reset myself... and sometimes after a spontaneous reboot it will stay on for about 4 seconds then suddenly reboot again, this time actually booting up fully.

i've rechecked simple things like everythings connected/seated securely...
have tried older display drivers...

I've no idea what to do at this point.... dont know if a part is faulty and needs to be sent back... dont even know where the problem is originating... so frustrating...

Sorry for such a long winded post im just trying to avoid leaving any potentially important info out... so hopefully it helps with diagnosing the problem!
Thanks in advance for any help, its greatly appreciated!

- Teh_Scrow
 
Yeah, your PSU is screwed. Don't buy cheap "own brand" PSUs if you're going to run a stonking great graphics card. I'd RMA the PSU and switch it for a Corsair.
 
That was a lot of typing for a simple answer.

Probably the PSU.

I assume you made sure you connected the 8 pin power connector for the CPU?
 
Last edited:
I'd guess PSU too. Seems that as soon as the gtx 560 has to do some serious work it crashes. Could be driver issues I suppose but seeing as you e tried different versions its hard to say.

Did you try Furmark? That puts heavy load on a card and PSU.
 
Thanks for all the replies guys.
Yep i made sure to connect the 8pin to the motherboard for the cpu.
Havent tried furmark but will now to see if that gives me anymore info i can spam you with :D
Someone else thought it might be the psu and suggested i try compare the bios pc health section voltages with readings from HWMonitor after booting into windows.
I cant make heads nor tails of it but the results were:
Bios:
Vcore 1.224v
DDR15v 1.536v
+12v 12.024v
VCC3 3.383v
VTT 1.076v

and hwmonitor readings were:
attachment.php


First column is current, second min and third is max.
Dont know if this confirms its the psu but hopefully its helpful in some way.
Cheers for the help so far guys, gonna go try furmark and messing about some more before RMA'ing.

Edit: Yikes @ explodey psu's
Bads never good until you see worst, ay?
 
Last edited:
Everything you describe there is what I had a good few years ago. Culprit ? PSU. It wasn’t broken it just simply wasn’t providing enough juice when it was needed. In 2d is was fine but push it in 3D and off it would go, black screen / looping sound. I replaced the PSU for an enermax 600W thing at the time and the problem was gone.
 
Not having a go, because I did the same thing a few years back (no failures/explosions etc though). But for the extra £25, you could have got the same power from a Corsair PSU. I'd quit while you were ahead with that PSU, bite the bullet and buy a high quality replacement PSU, before something really bad happens.
 
For your system, you can use a £50 PSU like the XFX 550W Pro or the Antec High Current 620W. The L7 should cope too, but I'd get one of the other two for a gaming rig, even with relatively low power requirements.
 
Back
Top Bottom