How can I get working 2 different nvidia cards with CUDA mining?

[Qu4k3r]

Hi,

So far, I was using guiminer (opencl) with 2 vcards on same pc

gtx570 ... 117 MH/s ... @default clocks
gtx460 ... 47 MH/s ... @default clocks

Forceware 266.58 works fine; but with versions 270.61 & 275.33, display driver suddenly shows black screen and stops working.

Now I want to use guiminer (cuda),
but  it does not show devices (gtx570 and gtx460) to select as opencl does it.

Gpu-z shows cuda's checkbox enable on main vcard (gtx570) only,
then I dummy plugged second vcard (gtx460) and got both vcards with cuda's checkbox enable.

But still does not show any device to select.
If I start to mine with cuda, it works with the main card only.
I tried with some flags (-device=0 -device=1 device=0 device=1) but not succeed.

How can I get working both cards?
Any idea or suggestion?

Thanks in advance

btw, cuda mining improve the hash rate by 23%!!!
gtx570 ... 144MH/s @default clocks with flags: -aggression=5 -gpugrid=480 -gputhreads=960

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[SHlFT]

Maybe by SLI?


Anyways Nvidia not as good for mining.

[Qu4k3r]

Problem was solved by adding this flag (-gpu=1) to the second vcard miner.

I know nVidia is not good for mining but...
I got a lucky shot becuase I solved a block mining in SOLO mode with the 570 in less than 10 min, LOL.-

BTW, You can not SLI different cards.-

[SHlFT]

Good thing you solved it.