Message boards : Graphics cards (GPUs) : PSU selection for dual GPU's: GTX460, 570, 580 ?
Author | Message |
---|---|
I am considering upgrading to a dual-gpu setup (460's or 570's), but am uncertain if/which of my current PSU(s) can safely handle the extra load for 24/7 unattended crunching. | |
ID: 20017 | Rating: 0 | rate: / Reply Quote | |
Well the 2 x GTX460 would pull 320w (in theory) and run cooler. Performance isn't great though as the GPUgrid app basically only utilizes 2/3rds of the 336 available cores. | |
ID: 20018 | Rating: 0 | rate: / Reply Quote | |
Well the 2 x GTX460 would pull 320w (in theory) and run cooler. Performance isn't great though as the GPUgrid app basically only utilizes 2/3rds of the 336 available cores. I was hoping this would have been addressed by now. Guess not. Not a problem on other projects though. | |
ID: 20021 | Rating: 0 | rate: / Reply Quote | |
I'm only running 850 Watt PSU's on my 3 Dual GTX 580's and 750 Watt PSU's on my Dual GTX 570's. One or 2 of my GTX 570 Box's may even have 650 Watt PSU's in them, I didn't bother to take them out so I could read what they were when I put the 570's in. They ran so I was good to go but I know some of those Box's have only 650 Watt PSU's in them ... | |
ID: 20025 | Rating: 0 | rate: / Reply Quote | |
I'm only running 850 Watt PSU's on my 3 Dual GTX 580's and 750 Watt PSU's on my Dual GTX 570's. One or 2 of my GTX 570 Box's may even have 650 Watt PSU's in them, I didn't bother to take them out so I could read what they were when I put the 570's in. They ran so I was good to go but I know some of those Box's have only 650 Watt PSU's in them. | |
ID: 20026 | Rating: 0 | rate: / Reply Quote | |
The 1090T is a 125w TDP part | |
ID: 20036 | Rating: 0 | rate: / Reply Quote | |
Two questions left: I have a GTX 580 and a GTX 480 in the same PC, and they work just fine, though there is no official NVidia driver supporting both cards (I'm using the GTX580's). Your case would be similar, so I guess a 460 & 570 would work together. -Desireable GPU PSU power distribution, i.e. the Owltech's even 18A per 12v lines 1,2,3,4, or the Scythe's 12v line 1@47A and 12v line 2@25A ? My other PC with two GTX 480s (overclocked to 780MHz and 800MHz) draws 713W from the 230V AC line at maximum GPUGRID utilization (running two KASHIF_HIVPR WUs at the same time with a C2Q 9650 CPU @4GHz), using a Chieftec 80+ APS135-1000C PSU. I would prefer Owltech's 700W PSU, because a PSU with many lower powered 12V rails is much safer (but they have to meet the GPU's power requirements) than a PSU with a higher powered 12V rail. Read more here, here and here (see myth 3). | |
ID: 20038 | Rating: 0 | rate: / Reply Quote | |
-Desireable GPU PSU power distribution, i.e. the Owltech's even 18A per 12v lines 1,2,3,4, or the Scythe's 12v line 1@47A and 12v line 2@25A ? Thank you for the links; useful information for a higher-performance PSU initiate. Basics such as 12V x 18A = 216W for the 6-pin connector of a 570 and 12V x 20A = 240W for the 6+2 8pin connectors for the 480 and 580's TDP figures make more sense, and the PCIE connector itself providing up to 75W (12V @6.25W) power for the card via the ATX connector. Years ago a flaky dual-Xeon S2DGE required a train and suitcase travel up to Tokyo's Akihabara tech support to learn an inadequate PSU was the cause, and an early Tyan Tiger MP dual-AMD setup that melted an ATX connector has made me more power-user wary. Forewarned is forearmed, and multiple high-performance GPU's is virgin territory for me (Pioneers, I salute! you ;p ). In the end it seems both 700w PSU's are more than adequate for single GPU use, but not up to multiple top-end GPU needs, so my next PSU will be +850w with all the right connections. | |
ID: 20040 | Rating: 0 | rate: / Reply Quote | |
Zombie67 had a performance issue with his GTX580. The card completed tasks slower than it should. The problem was caused by an inadequate PSU which required connecting Molex power connectors into a Y concentrator to feed the 8pin power input on the GPU. This was insufficient due to the limitations on the PSU rails and did not supply enough power. On replacing the PSU with an 8pin GPU power connector the system worked as required. The tasks probably completed slower because the GPU was reducing the frequencies of the card. The use of Molex converters is generally unadvisable for GPU’s. | |
ID: 20142 | Rating: 0 | rate: / Reply Quote | |
Message boards : Graphics cards (GPUs) : PSU selection for dual GPU's: GTX460, 570, 580 ?