Message boards :
Number crunching :
problems with multiple monitors
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Author | Message |
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speedbump Send message Joined: 19 May 01 Posts: 247 Credit: 192,906,380 RAC: 0 |
I had posted before about one of my systems that just did not seem to perform as it should, first with 2 gtx295s and now with 2 gtx580s. I could see that all both cards were working under tasks. I tried reinstaling srti, nvidia drivers, and even windows, all with no improvements. I had asked here if anyone knew if having multiple moniors would have an effect. I tried putting both on 1 card and also each on a seperate card. With the 580s i noticed that it was taking 42-43 minutes for each task with each card doing 2 workunits apiece. Most of my other setups can do them in about 15 minutes. Finally I did disconnet the second monitor, and guess what, the times are now where they should be. I really like having the 2 monitors, but 18000 RAC with 2 580s was not productive. Now I will have to wait untill the wife gets home to see how she reacts, as this is the main computer she uses. Hopefully we can get by with just the one:-) |
-BeNt- Send message Joined: 17 Oct 99 Posts: 1234 Credit: 10,116,112 RAC: 0 |
I had posted before about one of my systems that just did not seem to perform as it should, first with 2 gtx295s and now with 2 gtx580s. I could see that all both cards were working under tasks. I tried reinstaling srti, nvidia drivers, and even windows, all with no improvements. I had asked here if anyone knew if having multiple moniors would have an effect. I tried putting both on 1 card and also each on a seperate card. With the 580s i noticed that it was taking 42-43 minutes for each task with each card doing 2 workunits apiece. Most of my other setups can do them in about 15 minutes. Finally I did disconnet the second monitor, and guess what, the times are now where they should be. I really like having the 2 monitors, but 18000 RAC with 2 580s was not productive. Now I will have to wait untill the wife gets home to see how she reacts, as this is the main computer she uses. Hopefully we can get by with just the one:-) I've got dual monitors and don't have that issue at all. Are you setup as SLi? And what drivers are you running? Traveling through space at ~67,000mph! |
speedbump Send message Joined: 19 May 01 Posts: 247 Credit: 192,906,380 RAC: 0 |
I am using 266.58, and was using the newer 270 drivers, but switched back trying to solve the problem. The Nvidia control panel does not show the sli option on several of my systems, just allows multiple monitors and 3D settings. I do not have a SLI connector on the cards. This is the same as I have on several systems which all work. |
Cruncher-American Send message Joined: 25 Mar 02 Posts: 1513 Credit: 370,893,186 RAC: 340 |
What about MB BIOS settings for SLI? Might that be causing your problem? |
Fred J. Verster Send message Joined: 21 Apr 04 Posts: 3252 Credit: 31,903,643 RAC: 0 |
Don't know which CPU U use, but an i7-2600, has an onchip GPU, which would/should be better then previous solutions like handeling graphics by chipset and CPU, isn't that fast, but I have 2 HD5870, with a crossfire connection, but BOINC sees them as 2 separate GPUs. And they're blazingly fast, tried Crysis 2, don't see the 'fun' of shootin' around, in order to reach your 'goal' ;-) If you want to connect more screens, depends on the cards output-bus, DVI, most cases also VGA, HDMI(includes sound). |
speedbump Send message Joined: 19 May 01 Posts: 247 Credit: 192,906,380 RAC: 0 |
I did not realize that there are settings for SLI in the bios, so I never thought of looking there, but it is strange that it works with the additional monitor disconnected. It seems that every multi GPU system I have underperforms. Several worked well in the begining, then the performance degraded , and I just cant seem to figure them out.The units with single GPUs perform very well. |
Maverick Send message Joined: 26 Apr 09 Posts: 1 Credit: 5,462,454 RAC: 0 |
I do not have a SLI connector on the cards. This is the same as I have on several systems which all work. I had this back on 2x 8800GTX's and once I put the SLi Connector on (Thank you eBay as I lost mine) everything picked up and runs alot better. I also have the SLi option in the NVIDIA control panel. |
-BeNt- Send message Joined: 17 Oct 99 Posts: 1234 Credit: 10,116,112 RAC: 0 |
I do not have a SLI connector on the cards. This is the same as I have on several systems which all work. Yeah I don't believe you will get the SLi options in the control panel without the connector. Traveling through space at ~67,000mph! |
speedbump Send message Joined: 19 May 01 Posts: 247 Credit: 192,906,380 RAC: 0 |
It now appears that the problem has not been resolved. The time per WU have gone back to what they were before at about 42-45 minutes. The system does not perform better with 2 580s or 2 295s than it did with 2 8800s. The RAC is about the same. |
Brkovip Send message Joined: 18 May 99 Posts: 274 Credit: 144,414,367 RAC: 0 |
I know when I ran my 2 GTX 480's in SLI Seti times were far worse. If you disable SLI then they run at max speed again. I was just disabling SLI in the Nvidia driver when I was running Seti and enabling it when I wanted to play games. |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874 |
I know when I ran my 2 GTX 480's in SLI Seti times were far worse. If you disable SLI then they run at max speed again. I was just disabling SLI in the Nvidia driver when I was running Seti and enabling it when I wanted to play games. If you use an up-to-date driver, I believe you can leave SLI enabled and have the best of both worlds. |
Brkovip Send message Joined: 18 May 99 Posts: 274 Credit: 144,414,367 RAC: 0 |
I know when I ran my 2 GTX 480's in SLI Seti times were far worse. If you disable SLI then they run at max speed again. I was just disabling SLI in the Nvidia driver when I was running Seti and enabling it when I wanted to play games. I was using 266.58 and had the issue. Once I get the replacement, replacement power supply for the dual GTX 480 system back I will test the new one. |
speedbump Send message Joined: 19 May 01 Posts: 247 Credit: 192,906,380 RAC: 0 |
I dont have the SLI connector installed and I have tried 266.58, and the newer drivers, all with the same results. |
Brkovip Send message Joined: 18 May 99 Posts: 274 Credit: 144,414,367 RAC: 0 |
I dont have the SLI connector installed and I have tried 266.58, and the newer drivers, all with the same results. Have you tried a program that will tell you what speeds the core and memory are running at? Maybe the cards are getting down clocked and that is what is causing the long completion times. The second monitor shouldn't do a thing to the times of Seti. |
speedbump Send message Joined: 19 May 01 Posts: 247 Credit: 192,906,380 RAC: 0 |
I use MSI Afterburner. I have only heard of problems with the newest drivers down clocking over clocked cards and that did happen on my systems as well. The clock and cores are running at standard speeds for these cards as I do not have them over clocked at this time. |
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