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Author Topic: Will I need a larger power supply?  (Read 666 times)
xenon5
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August 15, 2011, 08:38:14 AM
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My current setup is 2x 5770s overlocked and 1xAMD Sempron 130, and I have a 530W 80+ certified PSU.  I have space for 1 more GPU on my motherboard.  When buying my components I followed a guide that suggested using the 530W PSU for 3 5770s, but I was thinking of getting a 5830 or 5850 instead for the 3rd GPU.  How much more power, if any, would I need if I chose one of these cards instead of another 5770?
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Kermee
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August 15, 2011, 08:42:18 AM
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My current setup is 2x 5770s overlocked and 1xAMD Sempron 130, and I have a 530W 80+ certified PSU.  I have space for 1 more GPU on my motherboard.  When buying my components I followed a guide that suggested using the 530W PSU for 3 5770s, but I was thinking of getting a 5830 or 5850 instead for the 3rd GPU.  How much more power, if any, would I need if I chose one of these cards instead of another 5770?

Do you have a Kill-A-Watt available to see how much headroom you have?

I'd highly suggest a 5850 over a 5830 since the TDP difference between a 5770 and 5850 is 50W.  Though you might be fine with a 5830 still...  Hard to say.

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Kermee

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August 15, 2011, 10:44:24 AM
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https://en.bitcoin.it/wiki/Mining_hardware_comparison
Has the wattage for some of the more popular overclocked cards.
Might help if you haven't seen it before.
pekv2
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August 15, 2011, 04:02:14 PM
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Maybe a 750w - 800w to be on the safe side?
deslok
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August 16, 2011, 01:15:17 PM
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The max board power of a 5770 is 108w. Check how the 530w is separated per voltage on the psu to make sure you have enough left on your 12v rails.

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