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Combine 12v rails? Pc crashes under load.

Last response: in Components
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November 19, 2009 5:48:31 AM

Ok, it must be the psu cutting out that causes reboot... I have a raidmax rx730-ss. I kn0w its not a good brand but i have it and must make do.. =). It looks like the grphics card runs off one rail and everything els off the other, but im n0t sure.. If it is like that, how do i make the card use both? I have a ati 4890 and it has 2 pcie power connectors on it. So could i just make an adaptor from molex to pcie? Would that solve the prob? Thanx
November 19, 2009 5:53:19 AM

The psu says it has 24amps on each rail...
a c 261 ) Power supply
November 19, 2009 6:12:34 AM

Yes you can get a molex to 6pin power adapter. The PSU has 2 though. One is 6pin one is 6+2 pin.........so 8 pin but 2 are detachable. Do you have both plugged in?

Yes it is a cheap PSU ......amps matter SO much more than watts. That supposed 730w has two 12v rails with 24 amps each for a total of 48 amps. A quality PSU like the Corsair 750TX has a single ( more efficient ) 60 amp 12v rail.
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November 19, 2009 6:25:48 AM

It has 2 6pin pcie plugs but they are both on the same wire, thats why i think they're on one rail. They're both plugged in.
a c 261 ) Power supply
November 19, 2009 6:42:46 AM

No it is running the way it is supposed to. It divides the power as it is needed. Honestly 48a should be fine unless you are running Crossfire. It is a cheap PSU though and the most likely scenario is that it is failing or just not delivering the rated power.
November 19, 2009 7:00:35 AM

So u suggest i send it back?
a c 261 ) Power supply
November 19, 2009 7:15:21 AM

Sounds to me like its broken if it only crashes under load. What are the rest of your specs? Anything overclocked?
November 19, 2009 7:20:43 AM

N0thing oc'd.. My specs are on my profile. Thanx
a c 261 ) Power supply
November 19, 2009 7:21:15 AM

Ok I checked your member configuration. Looks good except I have never heard of that brand graphics card. If it was a bad GFX card it wouldnt likely just crash under load like that. Have you checked temps?
November 19, 2009 7:28:29 AM

Its a generic PSU - dont expect squat

On the other hand how do you know its the power supply that has the issue (although its more then likely)? - it could be anything else aswell.
November 19, 2009 7:48:26 AM

The temps are all good. Cpu is around 65 at h0ttest. Mobo at 48. The rest are normal. Could it be a single core overheating? I don't have software to monitor cores... It only crashes in games with everything on full, when there's alot to handle, like alot of people or snow..
a c 144 ) Power supply
November 19, 2009 10:27:26 AM

If your system only crashes in games, it is more than likely the PSU.
November 19, 2009 4:48:45 PM

So you think i should send it back? Will they replace it?
a b ) Power supply
November 19, 2009 4:54:00 PM

replacement on the double
!