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Do I need a higher capacity psu?

post #1 of 14
Thread Starter 
I had been bored and started looking up the watt requirment for my system with the new video card I am ordering and came up with some troubling results. I currently have a antec earthwatts 650 watt.

With my overclock of 4009 Mhz @ 1.78v. My system chews up 641 watts, but without the overclock my system only uses up 526 watts. Is pushing the psu so close to it's max alright with my overclock or should I just take the overclock out or get a higher capacity power supply?

I used this calculator. http://extreme.outervision.com/PSUEngine
post #2 of 14
PSU rating calculators arent accurate. You should be fine with that PSU, as long as it does give out a good 600w. However, it may be worth upgrading, if you are going to upgrade the rig in the future.
    
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post #3 of 14
It's fine. You're using maybe 350W maximum stress testing load, in gaming more like 250-300W. You can CrossFire on that PSU easily.
post #4 of 14
Thread Starter 
Alright thats good, I'm not sure about crossfiring though lol. But yeah I think it should be fine. I had thought about getting bulldozer with a new motherboard, but that's pretty much over since I spent 200$ on this video card. I was going to take the 200$ towards a am3+ mobo and bulldozer and sell my 955 and asus board. But maybe I will get those things next christmas.
post #5 of 14
My system pulls about 460W when running LinX and Furmark at the same time. Your CPU draws about the same amount of power as mine or marginally more. 5870s draw only slightly more than 4870s.

You're looking at like 500-525W of load. The EA650 can handle that fine.
post #6 of 14
I know this isn't necessarily the appropriate thread, but uh, wow holy crap @ 1.78Volts flowing through your chip. You must really hate it. I suppose if you're going to upgrade by next xmas it won't matter, but I feel bad for whoever buys your chip heh.

But yeah, the 5870 is a surprisingly efficient beast, for how powerful it is. And the earthwatts are actually pretty nice little performing PSUs for how affordable they are. So all in all your system will play nice for sure.
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Bleeding Edge
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post #7 of 14
phaedrus how much would mine draw? and could I push the gtx 470s to 850mhz?
post #8 of 14
I would guess somewhere between 650 -700w in furmark. I really don't know how much being unlocked truly affects power draw. I'm sure the PSU wouldn't be a limiting factor in pushing them to 850mhz.
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post #9 of 14
1.78v? I would strongly suggest you keep below 1.55v unless you want to kill your chip... 1.6v if you have a really good water setup.
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post #10 of 14
damn those AMD chips sure can take a lot of vcore
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