Has anyone else noticed that heavy CUDA on a MacBook Pro (8600M GT) sucks more power than running both cores at 100%? The fans turn on almost instantly and go to 100% in about 8 seconds. Does anyone know the power draw (watts) of the 8600M GT?
Also, when AC is plugged in, I get
Device 0: “GeForce 8600M GT”
CUDA Capability Major revision number: 1
CUDA Capability Minor revision number: 1
Total amount of global memory: 536674304 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: 262144 bytes
Texture alignment: 256 bytes
Clock rate: 0.93 GHz
Concurrent copy and execution: No
Run time limit on kernels: Yes
Integrated: No
Support host page-locked memory mapping: No
Compute mode: Default (multiple host threads can use this device simultaneously)
When on battery power, I get
Device 0: “GeForce 8600M GT”
CUDA Capability Major revision number: 1
CUDA Capability Minor revision number: 1
Total amount of global memory: 536674304 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: 262144 bytes
Texture alignment: 256 bytes
Clock rate: 0.57 GHz
Concurrent copy and execution: No
Run time limit on kernels: Yes
Integrated: No
Support host page-locked memory mapping: No
Compute mode: Default (multiple host threads can use this device simultaneously)
Test PASSED
Seemingly, it runs at 50% because of the power consumption. 570 MHz instead of 930 MHz. It’s still pretty thrilling that I have 2/3rds the power of a GT120 (the base adapter for the Mac Pro) on a laptop. Just wish it were 1.3 instead of 1.1.
I’m not complaining, by the way. This is like carrying a supercomputer in a laptop bag!