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500w enough?

post #1 of 25
Thread Starter 
So I'm planning on buying another 5770 to crossfire with my current one, would my power supply be able to 2 5770s and an i7 overclocked?
Turbojet
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i7 920 @ 3.2ghz P6T SE Vapor X 5770 @ 1000/1350 6gb Patriot Viper @ 1600MHz CAS 8 
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Turbojet
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i7 920 @ 3.2ghz P6T SE Vapor X 5770 @ 1000/1350 6gb Patriot Viper @ 1600MHz CAS 8 
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WD 640gb/Seagate 1TB 7 64bit Earthwatts 500W HAF 922 
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post #2 of 25
I would say no, but others might say yes. i would check Antec's PSU wattage calculator: http://www.antec.outervision.com/
post #3 of 25
Yes, your system is going to be pulling about 400-450 watts depending on overclocks according to benchies I found.
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post #4 of 25
It might be possible - Wouldnt recommend it though. - But it should be able to run personally I juts don't trust the hardware THAT much smile.gif
Main PC
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Main PC
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Core i5 760 2.8GHz @ 4.0GHz Asus P7P55D 2x Sapphire HD 5770 in CF 8GB (4x2GB) Corsair XMS3 
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post #5 of 25
In a system like mine, at 90% usage with a 5770, it could use 550+W so i would go with a 600W. My current setup rates at 647W and i have a 750W biggrin.gif
post #6 of 25
Quote:
Originally Posted by Nemesis158;13327124 
In a system like mine, at 90% usage with a 5770, it could use 550+W so i would go with a 600W. My current setup rates at 647W and i have a 750W biggrin.gif

You don't use much over 500 watts at full load. lol

OP, 500 watts will be fine if you don't stress it. 600 watts is where you want to be due to how much power overclocking takes up on the i7's.
    
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330 Watt Power *BRICK*! 
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post #7 of 25
Thats at 3.4GHz, i move it around alot though. it is sitting at 4GHz 1.35V right now so it does use 647W.

What i would do, is figure the minimum PSU wattage the manufacturer requires for the card, and add that to your CPU wattage. an i7 920 at 4GHz on 1.35V sits around 220W under 90% load. i just checked the psu calculator for 2 5770s and it says 620W, so 600W should be good
post #8 of 25
Yep it's enough for two 5770s and an I7.

I have a 3.6Ghz Phenom II quad and a stock 5970 running off of an Enermax 525w for the last few months. Everything is running great.

That Antec can handle it. Plus your I7 only has a mild OC.
    
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post #9 of 25
I'm not saying it won't power that much hardware, which it probably will, but putting that much load on it is going to degrade its life much quicker than with a higher wattage unit. you're going to end up wishing you had bought a better unit when that one dies 6 months from now......
post #10 of 25
I have the same PSU at the moment until I replace it, there's no way I'd trust 2 GPU's on it.

I'd personally get something higher in the 600w range, quality PSU, but I like to have the headroom to be sure of things. If you don't have a backup if it fails, you're out of commision for awhile. redface.gif


Scratch that, I was wrong. gunner.gif
Edited by Nightz2k - 4/30/11 at 5:14pm
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