I've seen lots of threads but no solution.

A 925 running BOINC 6.6.28 on Win7 64x is detected as only one CUDA device:

(CUDA device: GeForce GTX 295 (driver version 18585, compute capability 1.3, 896MB, est. 106GFLOPS).
Done: attached 2 lcd monitors, 185.85 Win 7 video drivers.
Nvidia control panel PhysX GPU accelerator: ON
Select the multi-GPU mode: Do not use multi-GPU mode.

Unfortunately, I think the problem lies with Windows 7. I don't know of anyone that has gotten both GPU's to work. I might experiment a little, like trying to use a cc_config with the use_all_gpus entry or a dummy plug on your second dvi output and extending the desktop to it. Unfortunately, I think its the video driver in particular Windows 7, and there's just not really any options unless a new driver comes out.

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Unfortunately, I think the problem lies with Windows 7. I don't know of anyone that has gotten both GPU's to work. I might experiment a little, like trying to use a cc_config with the use_all_gpus entry or a dummy plug on your second dvi output and extending the desktop to it. Unfortunately, I think its the video driver in particular Windows 7, and there's just not really any options unless a new driver comes out.

Done all the above... I'm now installing XP x64 185.85 / BOINC 6.6.28 maybe more luck with this setup.

Unfortunately, I think the problem lies with Windows 7. I don't know of anyone that has gotten both GPU's to work. I might experiment a little, like trying to use a cc_config with the use_all_gpus entry or a dummy plug on your second dvi output and extending the desktop to it. Unfortunately, I think its the video driver in particular Windows 7, and there's just not really any options unless a new driver comes out.

Done all the above... I'm now installing XP x64 185.85 / BOINC 6.6.28 maybe more luck with this setup.

I can't get XP x64 on that machine for some reason maybe too new.
So if anyone has another bright idea.

Should be able to install XP 64, I had it on my i7 for a while for testing. What sort of problem are you having?

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I have 2 boot disks in the system.
1 is set for Win 7 X64
2 is used for XP Prof X64

I installed Win 7 first on disk 1 setting this one as the boot disk. Ok.
I set disk 2 as boot disk in the BIOS.
Installed XP, then it goes into reboot
The 1e time it destroyed the boot partition of the 1e drive, easy to solve in Win7
I saw the partition on 2 was not set as active so I did that in Win 7.
The 2e time it missed the boot loader.
The 3e time I got a read write error when the system tried to boot.
I checked the 2e drive for errors in Win 7 Ok.

I've got this XP X64 running on another system, works just fine.

Unfortunately, I think the problem lies with Windows 7. I don't know of anyone that has gotten both GPU's to work. I might experiment a little, like trying to use a cc_config with the use_all_gpus entry or a dummy plug on your second dvi output and extending the desktop to it. Unfortunately, I think its the video driver in particular Windows 7, and there's just not really any options unless a new driver comes out.

Windows 7 beta and RC both run multiple CUDA devices fine. I've been doing it for months. This ID for the RC, this ID for the beta. These are the same physical host. Both the 182.50 and 185.85 drivers work. There has never been a cc_config.xml present. There is a dummy plug in the machine at the moment, but I have also run with a real second monitor. I have run stock CUDA, Raistmer v9 CUDA and currently run Raistmer v11 VLAR kill refined CUDA. Never a problem.

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Classic 82353 WU / 400979 h

Windows 7 beta and RC both run multiple CUDA devices fine. I've been doing it for months. This ID for the RC, this ID for the beta. These are the same physical host. Both the 182.50 and 185.85 drivers work. There has never been a cc_config.xml present. There is a dummy plug in the machine at the moment, but I have also run with a real second monitor. I have run stock CUDA, Raistmer v9 CUDA and currently run Raistmer v11 VLAR kill refined CUDA. Never a problem.

I use the same VLAR kill exe. Tried it on Seti Beta with the stock version but still only one running. The same with GPUGRID. ... And BOINC is only reporting 295.
What is your BOINC report saying about the card?
What is your BOINC version?
But you are not running a 295 and maybe the problem is specific to that card.

I'm running multiple gpu's on Windows 7 64-bit also (GTX 260's). The problem he's having is with the GTX 295, specifically, 2 gpu's on one card.

If you're trying to setup a dual boot system, you need to install the older version (XP) first, and then install Windows 7. It can be done the other way, but it's very difficult. If it were me, I would start over by installing XP, deleting all exsisting partitions, then creating two new partitions and quick formatting them. Place them wherever you like, but I would put them both on the same drive and use the other drive to store my large files and ones I wouldn't want to lose, such as movies, photos, etc.

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I'm running multiple gpu's on Windows 7 64-bit also (GTX 260's). The problem he's having is with the GTX 295, specifically, 2 gpu's on one card.

If you're trying to setup a dual boot system, you need to install the older version (XP) first, and then install Windows 7. It can be done the other way, but it's very difficult. If it were me, I would start over by installing XP, deleting all exsisting partitions, then creating two new partitions and quick formatting them. Place them wherever you like, but I would put them both on the same drive and use the other drive to store my large files and ones I wouldn't want to lose, such as movies, photos, etc.

I have 2 separate physical boot drives. But I give it one more try, I will unplug the Win 7 boot disk and try again.

I have 2 separate physical boot drives. But I give it one more try, I will unplug the Win 7 boot disk and try again.

Grrrrrr that solved the problem, XP did install properly, not as easy and fast as Win 7, but as I'm more familiar with XP.
And... the most important part is, that I now have 2 cuda devices found and running.
So XP prof 64x works fine with BOINC 6.6.28 and a 295 card.

Hi Fred. On my quad (test machine) Have 1 drive for the regular O/S (Vista business) & use mobile racks for the others, so whenever I want to boot up into the regular O/S, I just switch off (or remove caddy if no switch) the other HD's, it makes life simpler.

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Hi Fred. On my quad (test machine) Have 1 drive for the regular O/S (Vista business) & use mobile racks for the others, so whenever I want to boot up into the regular O/S, I just switch off (or remove caddy if no switch) the other HD's, it makes life simpler.

I can easily remove the drive. But I think plugging it in again and adjusting the boot by BIOS is even simpler.
Hopefully this was only necessary for the installation.
It's a shame WIN 7 looks and feels real nice.
But I've seen how different the driver structure is between XP and Vista/W7. And how complex. I have great admiration for the driver developer(s), even when it sometimes doesn't work.

Only one thing remaining and that is Seti work......