Not all devices showing up in CUDA Show up in Windows device manager...but not CUDA

Win7 x64 enterprise system.

3 x FX3800 and 1 x FX580 all plugged in and visible in device manager and enabled.

But deviceQuery only reports two of the FX3800 cards (see below).

Any ideas?
-jm


Device 0: “Quadro FX 3800”

CUDA Driver Version: 3.0

CUDA Capability Major revision number: 1

CUDA Capability Minor revision number: 3

Total amount of global memory: 1054670848 bytes

Number of multiprocessors: 24

Number of cores: 192

Total amount of constant memory: 65536 bytes

Total amount of shared memory per block: 16384 bytes

Total number of registers available per block: 16384

Warp size: 32

Maximum number of threads per block: 512

Maximum sizes of each dimension of a block: 512 x 512 x 64

Maximum sizes of each dimension of a grid: 65535 x 65535 x 1

Maximum memory pitch: 2147483647 bytes

Texture alignment: 256 bytes

Clock rate: 1.20 GHz

Concurrent copy and execution: Yes

Run time limit on kernels: No

Integrated: No

Support host page-locked memory mapping: Yes

Compute mode: Default (multiple host
threads can use this device simultaneously)

Device 1: “Quadro FX 580”

CUDA Driver Version: 3.0

CUDA Capability Major revision number: 1

CUDA Capability Minor revision number: 3

Total amount of global memory: 519634944 bytes

Number of multiprocessors: 4

Number of cores: 32

Total amount of constant memory: 65536 bytes

Total amount of shared memory per block: 16384 bytes

Total number of registers available per block: 8192

Warp size: 32

Maximum number of threads per block: 512

Maximum sizes of each dimension of a block: 512 x 512 x 64

Maximum sizes of each dimension of a grid: 65535 x 65535 x 1

Maximum memory pitch: 2147483647 bytes

Texture alignment: 256 bytes

Clock rate: 1.13 GHz

Concurrent copy and execution: Yes

Run time limit on kernels: No

Integrated: No

Support host page-locked memory mapping: No

Compute mode: Default (multiple host
threads can use this device simultaneously)

Device 2: “Quadro FX 3800”

CUDA Driver Version: 3.0

CUDA Capability Major revision number: 1

CUDA Capability Minor revision number: 3

Total amount of global memory: 1054670848 bytes

Number of multiprocessors: 24

Number of cores: 192

Total amount of constant memory: 65536 bytes

Total amount of shared memory per block: 16384 bytes

Total number of registers available per block: 16384

Warp size: 32

Maximum number of threads per block: 512

Maximum sizes of each dimension of a block: 512 x 512 x 64

Maximum sizes of each dimension of a grid: 65535 x 65535 x 1

Maximum memory pitch: 2147483647 bytes

Texture alignment: 256 bytes

Clock rate: 1.20 GHz

Concurrent copy and execution: Yes

Run time limit on kernels: No

Integrated: No

Support host page-locked memory mapping: Yes

Compute mode: Default (multiple host
threads can use this device simultaneously)

PASSED

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