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How long would my PSU hold up to CF 5850's?

post #1 of 7
Thread Starter 
Hi all,

I have this psu
http://www.newegg.com/Product/Produc...82E16817341017

I want to get a second 5850 and I found the deal I was waiting for.... cypress pro card for sub $200

http://www.newegg.com/Product/Produc...82E16814127500

I can afford the card now but not the power supply I want to get to power them.

How long will my current psu handle the dual card set up for if at all?

thanks!
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SuperMegaPwnsauce
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post #2 of 7
I think your psu will be fine, the 5850 is a 151watt card so 302 CF leaves 298 spare for your cpu and mobo etc, i think with 600watt you should be fine, people often use 1000watt psu for sli but theres not really any need its over kill. hope that helps
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post #3 of 7
I don't think it will be able to support the 2 5850s at all.
Looking at some comments, I saw that it was unable to support two 4850s which have very similar power consumption as the 5850.

So bottom line is, you won't be able to use the second 5850 without upgrading your PSU. Unfortunately.

I recommend a 750W+ PSU for the 5850 Crossfire setup.
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post #4 of 7
Thread Starter 
I am seeing from calculating the power my system takes its should be around 550w so why would it not be able to support it at all?
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post #5 of 7
Its a close call. It has 500W in 12v rail so its not actual 600W. If it does not have the cables (PCIE) i will not use it.
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Ishimura
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post #6 of 7
5850 CF should run fine on your PSU. AMD says 600 W is recommended for 5850 CF. This review says your PSU is good quality, although it won't go further than 600W.

This is full system load running Furmark (extremely power hungry program):



550W from the wall, so that is around 470W at the PSU (assuming 85% efficiency).

Now this is load from WoW:



Just don't go too extreme on the overclocks imho.
Edited by Riou - 1/6/11 at 7:21am
post #7 of 7
Thread Starter 
I don't overclock video cards at all.
SuperMegaPwnsauce
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SuperMegaPwnsauce
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Logitech G910 Orion Spectrum Seasonic Flagship PRIME TITANIUM 650W Fractal Design Define R5 W/ 3 Phanteks PH-F140S... Logitech G Pro 
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