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Pushing my 750w?

post #1 of 11
Thread Starter 
I just want to know if I'm pushing my PSU or I still have head room.
I have two GTX 470's in 2 way sli and a Core i7 920 running on a 750w OEM. The power supply is from alienware and I presume it was made by delta (don't flame). I recently overclocked my graphics cards to a 725 mhz core and a 1450 mhz shader. Just wondering if I'm pushing it.

Thank you
post #2 of 11
Well 750 should power up those cards with no problem,but if that psu can't pull what it says than you very well could have a problem.
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post #3 of 11
Delta isn't a bad brand to be honest. Their high end OEM PSUs are pretty reliable. But back to your problem. Given that each GTX470 has a TDP of 215 watts and that an OC'ed i7 920 won't use more than 200 watts I would go ahead and say your system still has some headroom given that the PSU isn't severely overrated.
.
The above calculations are also done with TDP figures and it is unlikely that your whole system will be at 100% load at any point in its life.
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post #4 of 11
Those PSUs were really efficient as far as I remember you could throw anything you wanted to them and not worry so I'd say you're good. Just to be sure try to run furmark and linx at the same time and see what happens
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post #5 of 11
im sure that PSU is crap, and really only a 500w psu so yes im gona say its pushing it :-)
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post #6 of 11
It fully depends on that actual maker of the PSU, and the internals it has. 750w is about perfect for your system. But if that OEM unit can provide it, that's another story.
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by Enthusiast View Post
Delta isn't a bad brand to be honest. Their high end OEM PSUs are pretty reliable. But back to your problem. Given that each GTX470 has a TDP of 215 watts and that an OC'ed i7 920 won't use more than 200 watts I would go ahead and say your system still has some headroom given that the PSU isn't severely overrated.
.
The above calculations are also done with TDP figures and it is unlikely that your whole system will be at 100% load at any point in its life.
Ahh. This is what I was looking for. Thank you .
post #8 of 11
Thread Starter 
Quote:
Originally Posted by ShortySmalls View Post
im sure that PSU is crap, and really only a 500w psu so yes im gona say its pushing it :-)
Stop trolling.
Quote:
Originally Posted by pioneerisloud View Post
It fully depends on that actual maker of the PSU, and the internals it has. 750w is about perfect for your system. But if that OEM unit can provide it, that's another story.
I haven't had a problem so far since I put the second card in and Oc'd them both. The SLI has been running great so far. I was just a little worried if I was to OC them anymore I'd be running into BSOD and other problems.
post #9 of 11
Yeah I agree. Kind of made me go what???? when I saw this comment on the OP's psu.

Looks as you have a very decent psu OP.
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post #10 of 11
Even if you system is 600 watts MAX... and your psu isn't pushing 750 watts... and only around 600 watts...you still fine... unless you do benchmarks or stress test that when your psu need to be up to the task....

if you are really concern....do some stress testing to your cpu/gpu... and then see if it holds up...if nothing happens..then yes your psu is fine... but if its poorly made psu..don't know how 'good' is that.... good luck
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