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BOINC Not Using Both GPUs
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Author | Message |
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woodenboatguy Send message Joined: 10 Nov 00 Posts: 368 Credit: 3,969,364 RAC: 0 |
Did a little looking around (I'm sure the answer is out there) but can't find it. Any clues? This is the machine in question. It has a second GTX 285 installed but doesn't show up in BOINC. I am only running SETI stock apps. It did show up at one time while I had this box running Windows Home Server but I've since switched it over to Windows 7 for 64 bit. The drivers show up as working correctly in the Device Manager. Thanks for any assistance. Regards, [url][/url] |
dnolan Send message Joined: 30 Aug 01 Posts: 1228 Credit: 47,779,411 RAC: 32 |
Do you have anything plugged into the card? A second monitor or dummy plug may be needed. Also, have you tried extending the desktop to the second card? I've seen it happen a couple of times where Windows can see a device fine but Boinc can't. For me, a dummy plug did the trick. -Dave |
woodenboatguy Send message Joined: 10 Nov 00 Posts: 368 Credit: 3,969,364 RAC: 0 |
Thanks Dave....that is what I was trying to remember seeing as advice for this. At the moment the second card does not have anything plugged into it. The desktop is not extended to it either. No sli of course as well. I'll give that a try. Regards, |
hiamps Send message Joined: 23 May 99 Posts: 4292 Credit: 72,971,319 RAC: 0 |
Thanks Dave....that is what I was trying to remember seeing as advice for this. At the moment the second card does not have anything plugged into it. The desktop is not extended to it either. No sli of course as well. With 2 cards I plugged a second monitor in and did a restart and was able to disconnect 2nd monitor and didn't need it again. May give that a try if you have one to try. Once I put 3 in I needed dummy plugs or Boinc only sees 2 cards. Official Abuser of Boinc Buttons... And no good credit hound! |
Gundolf Jahn Send message Joined: 19 Sep 00 Posts: 3184 Credit: 446,358 RAC: 0 |
It did show up at one time while I had this box running Windows Home Server but I've since switched it over to Windows 7 for 64 bit. Has <use_all_GPUs> in the cc_config.xml file survived the transition? :-) Gruß, Gundolf Computer sind nicht alles im Leben. (Kleiner Scherz) SETI@home classic workunits 3,758 SETI@home classic CPU time 66,520 hours |
Fred J. Verster Send message Joined: 21 Apr 04 Posts: 3252 Credit: 31,903,643 RAC: 0 |
With 2 cards I plugged a second monitor in and did a restart and was able to disconnect 2nd monitor and didn't need it again. May give that a try if you have one to try. Once I put 3 in I needed dummy plugs or Boinc only sees 2 cards. Same problem on my XP64 host, plugged in a second (GTS250) nVidia card, a 9800GTX+, is already on the system, BOINC 6.10.17. does see the 'newer'G92 (GTS250) and uses it, but doesn't use the 9800GTX, anymore. Plugged in a monitor and extended the desktop, which did the job. Unplugged the monitor, but first, had to add a cc_config.xml, with <use_all_GPUs>1</use_all_GPUs> as option. And some log_flags. Now it (sometimes) run's 4 CPU CPDN WU's and 2 (0.04-0.24)CPU+GPU GPU-Grid or SETI or Einstein !? It made me wander why, it does run, these 2 (Not New) Projects, regardless of BOINC and WEB/Account, resource share! Has to be a debt-issue, cause I crunched both projects before. CPDN & GPUGrid. Received a load (~700) WU's from SETI, but they're still waiting to run. Nicely devided on 3 Quadies. Of which, 1 is 'stuck' with 100 (!) Docking WU's, 4 running and 96 pausing. The other mentioned above, 1, actually runs SETI and Collatz C. and always reaches it's limit of 150WU's a day, after 6 hours, so enough time left for SETI- WU's. |
woodenboatguy Send message Joined: 10 Nov 00 Posts: 368 Credit: 3,969,364 RAC: 0 |
How odd. I did as Dave suggests above and plugged in a second monitor and voila up came the second GTX 285. So, being a curious fellow I unplugged it and rebooted. Up comes both GTXs again, as they once did. What's up with that? Why does it need a second monitor plugged into it for a boot and then it's fine again? Regards, |
Wembley Send message Joined: 16 Sep 09 Posts: 429 Credit: 1,844,293 RAC: 0 |
It depends on what is left in the registry. After a simple reboot there is still enough left there in the registry to use both GPU's, but after something like a driver update the registry probably gets cleared of cruft relating to the old driver and you have to do it again. Just guessing. |
Longbowgun Send message Joined: 15 Mar 10 Posts: 2 Credit: 80,280 RAC: 0 |
let me know if this worked for you I'm running 2 ge force 8400 but boinc is only showing 1. i'm only showing 512 m of ram as well... They are 512 each. |
AndyW Send message Joined: 23 Oct 02 Posts: 5862 Credit: 10,957,677 RAC: 18 |
let me know if this worked for you I'm running 2 ge force 8400 but boinc is only showing 1. It did, he already posted to say: How odd. I did as Dave suggests above and plugged in a second monitor and voila up came the second GTX 285. So, being a curious fellow I unplugged it and rebooted. Up comes both GTXs again, as they once did. |
Longbowgun Send message Joined: 15 Mar 10 Posts: 2 Credit: 80,280 RAC: 0 |
That did for me, too... |
woodenboatguy Send message Joined: 10 Nov 00 Posts: 368 Credit: 3,969,364 RAC: 0 |
Hmmm... one for two. My laptop now suddenly decided to drop one of its two Nvidia cards. Device Manager says everything is there and working properly. Stopped BOINC, attached an external monitor and restarted BOINC. Nada. Rebooted and checked again....BIG NADA! This is annoying especially as on the laptop it now has too many units to complete on time. It coughed up a bunch not completed by the deadline before I noticed this was going on (and why is BOINC scheduling things due in April when stuff in March isn't done yet?!). I'm going to revert to earlier drivers next to see if this clears up. I did go on a "let's get these up to date" inadvisedly across the three machines crunching. Next update when I've pushed everything backwards - look forward to hearing from anyone else not getting this to work properly as well. Regards, |
Fred W Send message Joined: 13 Jun 99 Posts: 2524 Credit: 11,954,210 RAC: 0 |
Hmmm... one for two. My laptop now suddenly decided to drop one of its two Nvidia cards. Device Manager says everything is there and working properly. When you attached the external monitor, did you extend the desktop (in the Nvidia control panel) across the 2 desktops? F. |
Jord Send message Joined: 9 Jun 99 Posts: 15184 Credit: 4,362,181 RAC: 3 |
Device Manager says everything is there and working properly. I've seen Device Manager say the same about a blown audio card... but it really wouldn't work. Windows would find it, install its own drivers (the drivers from the manufacturer refused to install -> clue), it would get an interrupt and a memory address, but giving sound? Nuhuh. ;-) Same with two network Interface Cards. So I wouldn't take everything Device Manager says for truth. :-) |
SciManStev Send message Joined: 20 Jun 99 Posts: 6651 Credit: 121,090,076 RAC: 0 |
Hmmm... one for two. My laptop now suddenly decided to drop one of its two Nvidia cards. Device Manager says everything is there and working properly. I have fixed, built, and tuned computers for years, and it is strange to say that for a hobby of solving math problems very fast, it is actually necessary to back-date a driver, and use on older OS. When I return a computer to someone, it has every driver, patch, and required software installed. The drive is defragged, and all virus, spyware, updates, and defrag happen every Thursday night into Friday morning. It is just interesting that to get maximum performance, you need to use older software revisions. Warning, addicted to SETI crunching! Crunching as a member of GPU Users Group. GPUUG Website |
SciManStev Send message Joined: 20 Jun 99 Posts: 6651 Credit: 121,090,076 RAC: 0 |
Sorry for the double post. It seemed like it didn't go through the first time, so I pushed the button again. Yep, your right. I still learning. Other than very sporadic contact with National Instruments message boards, these are the first message boards I have ever used. It's easy to read the posts, but it takes some experimenting to get the hang of this. Warning, addicted to SETI crunching! Crunching as a member of GPU Users Group. GPUUG Website |
Fred W Send message Joined: 13 Jun 99 Posts: 2524 Credit: 11,954,210 RAC: 0 |
Sorry for the double post. It seemed like it didn't go through the first time, so I pushed the button again. You should still be able to edit the duplicate to replace the text there with the apology? F. |
woodenboatguy Send message Joined: 10 Nov 00 Posts: 368 Credit: 3,969,364 RAC: 0 |
I did. Even opened Explorer on the external monitor just to give it some exercise. Nada. I've pushed back the driver now as well. Also nada. There goes that theory. Regards, |
woodenboatguy Send message Joined: 10 Nov 00 Posts: 368 Credit: 3,969,364 RAC: 0 |
Sage advice. Once you are on Windows, everything is relative. Regards, |
woodenboatguy Send message Joined: 10 Nov 00 Posts: 368 Credit: 3,969,364 RAC: 0 |
It is just interesting that to get maximum performance, you need to use older software revisions. Only somewhat. I deal more with business apps personally but in that arena you are always working with a collection of sometimes competing requirements. Speed on a driver is paramount but I can see some code jockey doing a trade-off between uber speed and fixing some other thing that needs gobs of cycles. In a sense he sees it as "his" cycles to be applied to the greater "problem" since it looms bigger in his radar for fixing. We on the other hand look at the "problem" and shrug (probably something for some board manufacturer or bios that we couldn't give a rat's ass about) and go with the older driver because it doesn't reflect the compromise. Regards |
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