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is my rig enough for GTX480 SLI? - Page 5

post #41 of 79
Quote:
Originally Posted by pioneerisloud View Post
Your PSU is plenty, yes .

OP:
Your 750w will be enough if you take it lightly on the loads. Don't load up your CPU, and both GPU's to 100%, and it'd be just fine.
Okay sweet thanks..
SLI 580's here I come.. j/k.. hmmm that would be overkill.. just wanted to know that I had enough head room for at least going high end sli..
Which I thought I would have to spend another 300 bucks just to sli just for the psu alone..
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post #42 of 79
Quote:
Originally Posted by TickleMeElmo View Post
Yes I know how to do basic arithmetic, the point is those cards were not overclocked and in an open test bench, you have to admit with the over 900 number in mind it is conceivable that you will run over 750W from the PSU at peak.

Although I'm pretty sure the 750W rating of the Cosair unit is a continuous rating and it can deliver far higher amounts of power for short periods of time.

While it is true that you never load everything in your system up to 100% at the same time, but the question here is that if it is enough under all circumstances. It's the same logic that goes into wanting to have 24H stability in an overclock while an overclock that fails in the 23rd hour would probably never fail in day to day usage.
They saw lower loads using 3dmark which is a really good look at what the power draw would be gaming, that loads up your system almost just like any high end game.

Why should the OP buy a new PSU when it isn't needed. That is like saying that you car can rev to 9000 RPM but the transmission can't handle it, just don't rev that high. Kinda like with a mazda RX8, the engine can rev well past 9k, 10k or even 11k RPM, but the stuff hooked to the motor, like pumps and other accessories can't handle it, that is why the rev limit is only like 9k.

You don't use Furmark or 3dmark under normal everyday circumstances. so there is no point in upgrading the PSU.
post #43 of 79
Quote:
Originally Posted by thrasherht View Post
They saw lower loads using 3dmark which is a really good look at what the power draw would be gaming, that loads up your system almost just like any high end game.

Why should the OP buy a new PSU when it isn't needed. That is like saying that you car can rev to 9000 RPM but the transmission can't handle it, just don't rev that high. Kinda like with a mazda RX8, the engine can rev well past 9k, 10k or even 11k RPM, but the stuff hooked to the motor, like pumps and other accessories can't handle it, that is why the rev limit is only like 9k.

You don't use Furmark or 3dmark under normal everyday circumstances. so there is no point in upgrading the PSU.
Speak for yourself. My CPU and both GPU's sit at 100% load all day everyday. And no, I'm not stress testing them either.

What happens if he wants to stress test an overclock on his SLI setup? He WILL run the risk of overloading that 750w just by running stress tests to ensure his SLI is stable. Do we ALL use that kind of power daily, or just gaming? No. But the risk is still there.
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post #44 of 79
the PSU is way to low. with a rig like that and a single 480 under Exrteem load will cover it nicely but 2 gpus a little to low.
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post #45 of 79
possibly.. but 850 watt would be on the safer side.
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post #46 of 79
cbf reading through the whole thread.. but 930 @ 4.4 + full loop + sli 480s.. 750 IS cutting it close!

it's been said before.. you don't need a 1000w psu.. but i think you do need a 850w.

the majority of people in this thread don't have a 480, let alone sli 480s and are just going by review sites. not saying their points aren't vaild or don't listen to them, just something to take into consideration.
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post #47 of 79
Yeah get a good 850 watter like an Corsair Ax or HX or an XFX 850BE
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post #48 of 79
Quote:
Originally Posted by thrasherht View Post
They saw lower loads using 3dmark which is a really good look at what the power draw would be gaming, that loads up your system almost just like any high end game.

Why should the OP buy a new PSU when it isn't needed. That is like saying that you car can rev to 9000 RPM but the transmission can't handle it, just don't rev that high. Kinda like with a mazda RX8, the engine can rev well past 9k, 10k or even 11k RPM, but the stuff hooked to the motor, like pumps and other accessories can't handle it, that is why the rev limit is only like 9k.

You don't use Furmark or 3dmark under normal everyday circumstances. so there is no point in upgrading the PSU.
Your analogy doesn't work, I'm not going to argue with you on motors because that is completely OT, but the analogy would be more akin to a car that does not have a speed limiter, has a rev limiter at 7k rpm but has a high quality but small fuel pump that can only supply the engine with enough fuel if there are four adults and one child or otherwise can only rev to 6.5k if there are four adults in the car (all while staying under the gross tare weight limit).
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post #49 of 79
Thread Starter 
Quote:
Originally Posted by SpeedNuggeT View Post

Also, GTX570 might be a better deal.
Actually no because I already have a GTX480 in my rig and adding a second one for 2-way SLI will cost me roughly $270. Whereas buying a GTX 570 will cost me over $300 and I will have just one single GTX570.

Alright guys I will try GTX480 SLI with my TX 750 watt PSU. WIll post back with results. I dont plan to ever use furmark
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post #50 of 79
So youd rather risk blowing everything up in your rig rather than spend the extra money and be on the safe side that it wont happen? On page 2, 2 480's pull 680 watts in crysis, imagine that with a much tougher game and then you also must factor in the CPU wattage at loads, im guessing 150 watts with your i7 at that speed.
If you keep your 750, I hope you realise that if your PSU goes, its has a high chance of taking everything else with it.
    
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