64 bit version tests:

my results.. for 680


C:\Users\gateway\Desktop\rpcminer-mod-x64\bin>rpcminer-mod-cuda.exe -url=btcguild.com:8332 -user=xxx -password=xxx -gpugrid=2048 -gputhreads=256 -gpu=0
Client will start 1 miner threads
Work will be refreshed every 4000 ms
1 GPU GUDA device(s) found
CUDA initialized
Search Configuration for gpu named: GeForce GTX 680
Your device:
   - 8 streaming multiprocessors (SM)
   - can run sm version 300
   - bitcoin miner is optimized for 5 gpugrids per SM
   - max value for gpugrid parameter is 2147483647
max nonce 3FFFFFFF
Done allocating CUDA resources for (2048,256)
iterations on gpu=32 blocks=2048 threads=256
Iterations: 63,hashs per iteration 16777216
Target = 00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffff


btw when I exit the app it kills my display driver..

my results for 560ti

C:\Users\stevet\Desktop\rpcminer-mod-x64\bin>rpcminer-mod-cuda.exe -url=btcguild.com:8332 -user=xxx -password=xxx -gpu=0
Client will start 1 miner threads
Work will be refreshed every 4000 ms
1 GPU GUDA device(s) found
CUDA initialized
Search Configuration for gpu named: GeForce GTX 560 Ti
Your device:
   - 8 streaming multiprocessors (SM)
   - can run sm version 210
   - bitcoin miner is optimized for 3 gpugrids per SM
   - max value for gpugrid parameter is 65535
max nonce 3FFFFFFF
Autotuning is on because no gridsize is given
To big grid size fixed!!
Done allocating CUDA resources for (65535,256)
iterations on gpu=32 blocks=65535 threads=256
Iterations: 2,hashs per iteration 536862720
Target = 00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffff
:180[CUDA] Error: unknown error

app crashes..