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Recommend desktop PSU for three-GPU CUDA scientific computing server?

T

TheChuckster

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Hello, I'm adding more GPUs to my desktop PC which will be crunching scientific computing calculations using CUDA and distributing the results over the network to researchers. It will be acting like a server in that it will be constantly running 24/7 often at full load. Reliability is the biggest priority. Which power supply would you recommend? I was thinking 1000 W minimum for headroom.

The specs are:
Three NVidia Geforce GTX 560 GPUs
Biostar TZ77XE3 LGA 1155 Intel Z77 ATX Motherboard
Intel Core i3-2120
G.Skill F3-10666CL9S-2GBNT 4GB DDR3 1333 RAM

As you can see, most of the load is placed on the GPUs themselves, it's more important for them to have computational horsepower than the CPU which just acts as a "dumb host".
 
Three 560s 24/7 full load? I would recommend a highly efficient 750-850 watt. What's your budget?
 
according to this a single 560 uses 285watts loaded...these would be all loaded all the time...sounds like

http://www.bit-tech.net/hardware/graphics/2011/01/25/nvidia-geforce-gtx-560-ti-1gb-review/8

so 3 of them would be what 855watts just for the GPUs


personally i think the 1000+ watt psu idea is much more realistic...even assuming some poor 850watt psu could handle running this the poor thing would be overloaded / close the whole time... in addition to being loud it would also seem to be a recipe for a quick demise of the power supply


oh right and almost none of the 850~watt units on newegg have 6 PCIe connectors the 3 that actually did have the 6x PCIe power connections where prices ~$180


so then if it was me... I think i would get this it is $24 ~ (after rebate) than the 1050watt seasonic x model

SeaSonic X-1250 $225 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151109&name=Power-Supplies


it should have plenty of head room, be quiet and reliable... price is good for this caliber of power supply ... 80+ Gold ...5year warranty.



I just got a X-750 for my rig.... fantastic
 
atarione said:
according to this a single 560 uses 285watts loaded...these would be all loaded all the time...sounds like

http://www.bit-tech.net/hardware/graphics/2011/01/25/nvidia-geforce-gtx-560-ti-1gb-review/8

so 3 of them would be what 855watts just for the GPUs


personally i think the 1000+ watt psu idea is much more realistic...even assuming some poor 850watt psu could handle running this the poor thing would be overloaded / close the whole time... in addition to being loud it would also seem to be a recipe for a quick demise of the power supply


oh right and almost none of the 850~watt units on newegg have 6 PCIe connectors the 3 that actually did have the 6x PCIe power connections where prices ~$180


so then if it was me... I think i would get this it is $24 ~ (after rebate) than the 1050watt seasonic x model

SeaSonic X-1250 $225 after rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151109&name=Power-Supplies


it should have plenty of head room, be quiet and reliable... price is good for this caliber of power supply ... 80+ Gold ...5year warranty.



I just got a X-750 for my rig.... fantastic
Click to expand...

Thats full system load. Not just the card.

Each card uses about 200-225w at full bore. Add about 100w for CPU and mobo, and we're right around the 750-850w Tsumi recommended. This should be sufficient for ya, but if you want to stay abit closer to the peak efficiency of these units, you may want to get a 1000w-1200w unit to hang around the 50-60% mark. The likely hood is you won't ever make your money back in efficiency, but if it does concern you, that is something you need to think about.

A Gold 1200w will have better efficiency at 50% load then a Platinum 600w at 100% load. Because you plan on being at max load most of the time, this may be something you want to consider.
 
Jorona said:
Thats full system load. Not just the card.

Each card uses about 200-225w at full bore. Add about 100w for CPU and mobo, and we're right around the 750-850w Tsumi recommended. This should be sufficient for ya, but if you want to stay abit closer to the peak efficiency of these units, you may want to get a 1000w-1200w unit to hang around the 50-60% mark. The likely hood is you won't ever make your money back in efficiency, but if it does concern you, that is something you need to think about.

A Gold 1200w will have better efficiency at 50% load then a Platinum 600w at 100% load. Because you plan on being at max load most of the time, this may be something you want to consider.
Click to expand...


ah...damn it ... i misread that... oh well i still like the X-1250 suggestion because it has a nice price and headroom / efficiency advantages from being 50-60% loaded ...plenty of PCIe connections and modular cabling to reduce clutter and help airflow which i would think is going to be a concern with 3x 560s running full out all day.
 
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