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Author Topic: Recommended Powersupply for 4x 5770s  (Read 949 times)
mrbashfo
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September 08, 2011, 09:31:54 PM
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I need a few recommended power supplies to power 4x 5770s and the system of course. It is running on a evga 680i with Pentium D processor with a sata hd.

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cicada
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September 08, 2011, 09:41:53 PM
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5770 has a TDP around 110W, lets call that 150W to give you some overhead and room for overclocking.

x4, that's 600W.

That's a pretty good number to be at - there are bazillions of power supplies around the 600-750W range, and even at 600W I think you'll be just fine, base system included.

My recommendation if you want to go cheap is this guy: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028

[edit] Don't use a single CX600 - see my post below.

The Corsairs are strong PSUs, I'm using 6 of them currently and just picked up two of the above as spares, though I kind of doubt I'll ever need them.

That PSU will give you 2x PCI-e 6pin connectors, and you'll just need a couple adapters to go from molex > PCI-e 6pin.


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September 08, 2011, 09:46:27 PM
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5770 has a TDP around 110W, lets call that 150W to give you some overhead and room for overclocking.

x4, that's 600W.

That's a pretty good number to be at - there are bazillions of power supplies around the 600-750W range, and even at 600W I think you'll be just fine, base system included.

My recommendation if you want to go cheap is this guy: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028

The Corsairs are strong PSUs, I'm using 6 of them currently and just picked up two of the above as spares, though I kind of doubt I'll ever need them.

That PSU will give you 2x PCI-e 6pin connectors, and you'll just need a couple adapters to go from molex > PCI-e 6pin.


recomending a 600W PSU after stating the graphics cards will eat 600W... not a good idea.
since the 600W isn't just for 12V, its 3.3 & 5v as well
then there is the motherboard, CPU & ram, HD as well to account for.

granted i don't think the video cards will pull 600W.
myself i would consider a Gold PSU since power is a constant and find something a higher wattage.
but thats just me.

cicada
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September 08, 2011, 09:56:19 PM
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recomending a 600W PSU after stating the graphics cards will eat 600W... not a good idea.

You might've missed the part where i calculated at 150W, these cards don't really pull much more than 100W.  There's quite a bit of room to breathe, and the Corsairs are quite happy working at their maxium stated pull.

It comes down to price really, if you want absolutely safe and highly efficient, go with a 750W gold.

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mrbashfo
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September 08, 2011, 09:58:50 PM
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what about this? http://www.newegg.com/Product/Product.aspx?Item=N82E16817171054

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mike678
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September 08, 2011, 10:24:51 PM
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recomending a 600W PSU after stating the graphics cards will eat 600W... not a good idea.

You might've missed the part where i calculated at 150W, these cards don't really pull much more than 100W.  There's quite a bit of room to breathe, and the Corsairs are quite happy working at their maxium stated pull.

It comes down to price really, if you want absolutely safe and highly efficient, go with a 750W gold.
Your only taking into account the video cards there's at least 100 watts coming from the mobo cpu ect. 600 for an entire rig with 4 5770's overclocked is not realistic. Plus power supply's degrade over time especially if you push them past their efficiency point.
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September 08, 2011, 10:31:11 PM
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We need to know which pentium D processor it is some of those had a massive TDP on their own being a dual die netburst chip, as far as the videocards yes you could push more than 108 watts through them but don't expect them to live that's the most they're ever designed to dissapate you can safely assume they'll never pull more than 125 each and survive.

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September 08, 2011, 11:42:56 PM
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I need a few recommended power supplies to power 4x 5770s and the system of course. It is running on a evga 680i with Pentium D processor with a sata hd.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139022

My recommendation. 
mrbashfo
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September 09, 2011, 01:48:37 AM
 #9

what about the coolermaster I posted?

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MadHacker
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September 09, 2011, 01:51:53 AM
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what about the coolermaster I posted?
700W Power with Single +12V

i think it will do nicely.
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September 09, 2011, 02:39:41 AM
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what about the coolermaster I posted?
700W Power with Single +12V

i think it will do nicely.
Except it only claims 80% efficiency whereas the Corsair are Bronze and claim 85%. That 5% will pay for the PSU before you're done. Also, Corsair has a great warranty.

Not the CX600 though as that is a "group regulated" PSU and the 12V is only rated at 480W. Go with the TX750 for ample power, efficiency and long warranty. And it's not even that costly when you subtract 1 year of 5% efficiency gain. Get the V2 version.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021
$95 with pain-in-the-butt-rebate.

If you end up drawing 600W that 5% efficiency gain will save you,
( (600 / 0.80) - (600 / 0.85) ) /1000 *24*30 = 31.7 kWh/month.  If you pay 0.10/kWh that's $3.17/month.

cicada
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September 11, 2011, 06:41:29 AM
 #12

I retract my CX600 recommendation - it's rated capacity is 480W on the +12V rail, which will not be nearly enough.

Go with a 750W+ single rail and pay attention to the +12V rating, or go with dual PSUs.

Thanks for pointing this out BkkCoins

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September 11, 2011, 04:20:51 PM
 #13

what about the coolermaster I posted?
700W Power with Single +12V

i think it will do nicely.
Except it only claims 80% efficiency whereas the Corsair are Bronze and claim 85%. That 5% will pay for the PSU before you're done. Also, Corsair has a great warranty.

Not the CX600 though as that is a "group regulated" PSU and the 12V is only rated at 480W. Go with the TX750 for ample power, efficiency and long warranty. And it's not even that costly when you subtract 1 year of 5% efficiency gain. Get the V2 version.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021
$95 with pain-in-the-butt-rebate.

If you end up drawing 600W that 5% efficiency gain will save you,
( (600 / 0.80) - (600 / 0.85) ) /1000 *24*30 = 31.7 kWh/month.  If you pay 0.10/kWh that's $3.17/month.


I would pass on all thermaltake psu's currently
https://bitcointalk.org/index.php?topic=40564.msg494165#msg494165

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