I just tried this on c2075. The result agrees well with the c2050 card (107mH/s). There is fluctuation (from 70 to 140).
If I run ufasoft or cgminer I get 98mH/s. So there is ~10% improvement. Thanks.
btw I find a 100+% improvement of LTC mining speed with cuda optimization here
https://bitcointalk.org/index.php?topic=167229.60.
rpcminer-mod-cuda.exe -gpu=1 -url=http://api.bitcoin.cz:8332 -user=mh001.worker3 -password=snail -threads=1 -aggression=10 -workrefreshms=3000
Client will start 1 miner threads
Work will be refreshed every 3000 ms
2 GPU GUDA device(s) found
Setting GPU GUDA device 1
CUDA initialized
Search Configuration for gpu named: Tesla C2075
Your device:
- 14 streaming multiprocessors (SM)
- can run sm version 200
- 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
Done allocating CUDA resources for (8190,256)
iterations on gpu=512 blocks=8190 threads=256
Iterations: 1,hashs per iteration 1073479680
Target = 00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffff
Found nonce 17F376CB
2013-04-30 16:03:29 Found Hash!
Hashs found: 1
107333 khash/s
...
Hashs found: 5
Found nonce 286C65D
2013-04-30 16:05:53 Found Hash!
Hashs found: 6
143121 khash/s
107312 khash/s
Found nonce 33462917
2013-04-30 16:06:36 Found Hash!
Hashs found: 7
107312 khash/s
71546 khash/s
107326 khash/s
107326 khash/s