Message boards : Number crunching : Adding another GTX card to a desktop
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Dave_In_Oz Send message Joined: 13 Jul 09 Posts: 32 Credit: 287,042,950 RAC: 0 Level  Scientific publications      | |
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Hi, | |
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 Retvari Zoltan Send message Joined: 20 Jan 09 Posts: 2343 Credit: 16,201,255,749 RAC: 470 Level  Scientific publications  | |
I have a W7, i7 system with a GTX295 that works well. I am considering adding another GTX card and potentially upgrading my power supply. You should upgrade your power supply, if the current one is under 1000W. Are their any issues mixing a GTX295 with a Fermi class card on same system? The current (275.33) NVidia driver supports both cards, so it's ok. However, there could be power dissipation issues, because the GTX295 blows half of it's hot air inside the case. The GTX590's cooling works the same way. So there must be air exhaust vents in the front side of the case, especially if you choose the GTX590 as the second card. A new card would be used exclusively for GPUGrid, whilst it would be nice to drop in a top of the range (eg 590), cost will probably be factor. Can someone tell me what cards deliver best cost performance and can coexist with a 200 series card (ie compute, power usage, cost)? Looking at the price per GPU performance ratio, the GTX570 is the best (around the 70% of the GTX590's, and 67% of the GTX580's), it's the cheapest, but slowest card. Looking at the running cost per GPU performance ratio, the GTX590 is the best. The second best is the GTX570, the third one is the GTX580, which is not as much faster, as more it costs to run than a GTX570. | |
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skgiven Volunteer moderator Volunteer tester  Send message Joined: 23 Apr 09 Posts: 3968 Credit: 1,995,359,260 RAC: 0 Level  Scientific publications | |
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I would also recommend the GTX570; it gives the most credit/does the most work relative to the purchase cost, and gives a relatively good return per running cost. | |
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Dave_In_Oz Send message Joined: 13 Jul 09 Posts: 32 Credit: 287,042,950 RAC: 0 Level Scientific publications | |
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Thanks for the advice, it is much appreciated. I was leaning towards a 570, your responses have confirmed this. I have a good case with excellent airflow, plut I use TThrottle to provide some degree of failsafe in the even of things getting too hot. | |
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skgiven Volunteer moderator Volunteer tester Send message Joined: 23 Apr 09 Posts: 3968 Credit: 1,995,359,260 RAC: 0 Level Scientific publications | |
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Remember to use a tool such as MSI Afterburner to control the temperature through fan speed mapping. | |
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I would also recommend the GTX570; it gives the most credit/does the most work relative to the purchase cost, and gives a relatively good return per running cost. I am wondering what the problem is with the GTX560Ti GPU. | |
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Retvari Zoltan Send message Joined: 20 Jan 09 Posts: 2343 Credit: 16,201,255,749 RAC: 470 Level Scientific publications | |
Avoid the CC2.1 cards (GTX560Ti, 560, 550...). It's a CC2.1 card, having 48 CUDA cores per multiprocessor, and the problem is that the GPUGrid client can utilize only 2/3 of them (32, as in CC2.0 cards). | |
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MarkJ  Volunteer moderator Volunteer tester Send message Joined: 24 Dec 08 Posts: 738 Credit: 200,909,904 RAC: 0 Level  Scientific publications | |
Hi, The main problem with mixing different cards is you can't tell BOINC which one to use for which wu. It will also confuse it with the different time estimates for each one. Best if you keep to one type of card per machine. I personally upgraded to the GTX570 and removed my GTX295's. You could sell them and use the money on a more modern card these days. If your power supply can cope with a GTX295 then you'll be able to swap it for a GTX570 without having to replace the power supply. ____________ BOINC blog | |
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Message boards : Number crunching : Adding another GTX card to a desktop
