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PSU blew up last night, what psu should i buy?

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January 8, 2014 6:17:24 AM

Hey guys, my psu blew up yesterday and im looking to order a new one, hoping that all my other components haven't been damaged. I bought a new gpu asus gtx 760 oc2 and i was 5min into a game, then my pc powered down followed by a circuit shortage noise. So i've had an old psu, Alpine 750W and is really cheap. So here are my specs and im looking to buy a good quality psu.

Mobo : Asus M59AAX R2.0
CPU : AMD Bulldozer FX-8120 8 cores
GPU : Asus Geforce GTX 760 oc 2
RAM : Ballistix 2x4gb 1600mhz

I am quite sure the gpu caused it all since it all happened as soon as I installed this new gpu.

More about : psu blew night psu buy

January 8, 2014 6:23:26 AM

And most importantly i need a psu that is compatible with all my hardware.
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a b ) Power supply
January 8, 2014 6:27:59 AM

First remove the new card. Then see if the other components are not damaged by using a PSU from another machine even if you have to borrow one. If that's the case, then just get a new PSU. If you've got other damage, it's time to rethink based on the other new components you'll need.

Remember that the most power is required at start up. Once things are up and running they require less power but at startup everything comes on at once and the load is heaviest at that time.

So determine the _startup_ power needed by everything in the machine and add 25% "head room". Remember the power rating is the maximum the PSU supports so larger is better - don't get too close to the maximum. The more headroom you have the lower the load and stress on the PSU at startup.


BTW, I've had good experience with Antec.

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a b ) Power supply
January 8, 2014 6:32:08 AM

A nice 650 watt psu would do the job. For better efficiency and capability for future upgrades, you can buy any of the 80 plus silver or gold rated psu from corsair,cooler master,seasonic. All of them make great quality PSUs.

My personal recommendation : Seasonic X - Series 650 watt 80+Gold. (fully modular) (bang for a buck).
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January 8, 2014 6:33:34 AM

Quality not quantity. Your setup will easily run on a 400W power supply. Key is to get a good brand. As mentioned Antec, Seasonic, a few others. Read reviews and get the reliability ratings.
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January 8, 2014 6:33:43 AM

+1 for the Seasonic 620w, I'm running one in my system and it's solid as a rock.
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January 8, 2014 6:38:33 AM

ddpruitt said:
Quality not quantity. Your setup will easily run on a 400W power supply. Key is to get a good brand. As mentioned Antec, Seasonic, a few others. Read reviews and get the reliability ratings.


I would not run 400w on that system. A 760 will draw 180w on its own and the AMD 8120 is 125w. You smack all that on a single rail and you may run it on the 400w but it will be drawing over 80% load. Not only will a 550w + power supply be cheaper to run it will be quiter and cooler because it will be running closer to 50-60% capacity.
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a c 700 ) Power supply
January 8, 2014 6:55:12 AM

A system with a single GTX760 calls for 500watts http://www.realhardtechx.com/index_archivos/Page362.htm Quality 550watt XFX unit that will run your system just fine http://pcpartpicker.com/part/xfx-power-supply-p1550sxxb...
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January 8, 2014 7:11:21 AM

Thanks for all the answers, really helped me out guys. i decided to go for the 550watt XFX.
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January 8, 2014 7:42:43 AM

Poprin said:
ddpruitt said:
Quality not quantity. Your setup will easily run on a 400W power supply. Key is to get a good brand. As mentioned Antec, Seasonic, a few others. Read reviews and get the reliability ratings.


I would not run 400w on that system. A 760 will draw 180w on its own and the AMD 8120 is 125w. You smack all that on a single rail and you may run it on the 400w but it will be drawing over 80% load. Not only will a 550w + power supply be cheaper to run it will be quiter and cooler because it will be running closer to 50-60% capacity.


Those are bogus numbers. I regular test the peak loads of various rigs and few make it up to 350W and those are real monstors (high end CPUs, GPUs, multiple HDDs, etc). Those are peak loads seen under startup. Check Tom's reviews even their high end systems rarely draw over 450W. Instead of the old clock frequency inflation we now have wattage inflation. Most of the numbers on PSUs are bogus too, I guarantee it. They get away with ratings because they haven't been forced to. Since all the numbers are inflated the bigger is better myth has taken hold. A well built PSU will properly balance the loads across the various cables, a poor quality one will have a single rail for each voltage making problems worse. I regularly build machines with good 350W-450W PSUs and I know people that put cheap 600W+ PSUs on machines that I know draw less power, whose PSUs do you think last longer?

A lower wattage quality power supply is loads better than a high wattage cheap power supply, don't get caught up in the numbers. Put a sustained 600W load on one of those PSUs and it'll die a painful death.
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January 8, 2014 8:12:11 AM

As I said a quality 400w power supply probably will run that system, but do you think it will run as cool, quiet and effecient as a quality 600w unit? I think not. I'm not suggesting they go out and buy an 800w PSU but a 550w - 600w makes so much more sense in this case. Yes a cheap 600w PSU will not sustain 600w, neither will a cheap 400w sustain 400w.
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January 8, 2014 9:43:51 AM

Depending on the PSU most don't reach high efficiency until they're loaded at about 40% peak hits at about 60%-80%. Most systems use around 150W when running under a regular load so you still need a lower wattage supply to hit peak efficiency. But like you said you need a quality PSU, nuff said.
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