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PC won't boot after failed overclock - Page 3

post #21 of 27
Quote:
Originally Posted by Scott96 View Post

All the fans that start up, e.g. 1 case fan and the GPU fan are both directly connected to the PSU. The CPU cooler, that draws power from the MB, does not start.

So the Motherboard is not getting power. Hopefully your new PSU will solve that. thumb.gif
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post #22 of 27
I just experienced the same thing, although with a more updated rig (check Project Magis in sig for specs).

I think in my case it's the motherboard, since I tested my AX760 PSU with an actual tester and it was completely fine. Would you guys agree?
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post #23 of 27
Quote:
I think in my case it's the motherboard, since I tested my AX760 PSU with an actual tester and it was completely fine. Would you guys agree?

Those $10 testers only test no-load voltages. Ive had bad psus that voltages were fine on no load, but the minute a few amps were applied the voltages plummeted. A decent VOM is much better for testing.
Edited by cpmee - 4/16/14 at 3:25am
    
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post #24 of 27
Quote:
Originally Posted by cpmee View Post

Those $10 testers only test no-load voltages. Ive had bad psus that voltages were fine on no load, but the minute a few amps were applied the voltages plummeted. A decent VOM is much better for testing.

Even if the PSU powers on the fans, LED's, and pump when I bridge the 24 pin? It just seems that the motherboard is not receiving power, which unfortunately I can't verify since it doesn't have an LED.
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post #25 of 27
Quote:
Originally Posted by Scott96 View Post

Thank you very much to everybody that has helped me! Really means a lot to me to know there are still nice people out there on the internet!

I'm going to order a new power supply, I'm going to get the Corsair TX650 V2, since the graphics card I'm getting at christmas (XFX 7950) recommends 650W.

Thank you so much to all of you, hope I can return the favour some day!

Also heads up to anyone thinking of buying a PC from DinoPC.co.uk in the future, they clearly don't know how much power their PC's are going to use!

I see what you mean about dinopc... The PSUs they supply with their bundled rigs don't offer much headroom. All of the rigs have the minimum recommended PSU for the relevant GPU in the bundle.
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post #26 of 27
Quote:
Even if the PSU powers on the fans, LED's, and pump when I bridge the 24 pin?

At that point, you probably have about a 3 -5 amp load on it and should measure the voltage drop, if any, when it had no load (actually a load with one fan ) with a quality VOM. If it dropped to near spec line, then more load would kill it and the mobo wont boot.

Im not saying thats your problem, just saying that cheap psus testers arent worth a darn for diagnosing psu problems. They will tell you if its completely dead or not though, which is almost a duh anyway.
Edited by cpmee - 4/16/14 at 12:08pm
    
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post #27 of 27
Quote:
Originally Posted by cpmee View Post

At that point, you probably have about a 3 -5 amp load on it and should measure the voltage drop, if any, when it had no load (actually a load with one fan ) with a quality VOM. If it dropped to near spec line, then more load would kill it and the mobo wont boot.

Im not saying thats your problem, just saying that cheap psus testers arent worth a darn for diagnosing psu problems. They will tell you if its completely dead or not though, which is almost a duh anyway.

Well, I just tried a different PSU, and still nothing. Also swapped the processor, no good. I have no other idea besides the motherboard just dying during the stress test, although I have never had such a thing happen.
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