These are with Tydus' 'large memory' mod on Windows 7 x64 SP1
Core i7-920 (4 cores, no HT, 3.07GHz) ~100col/min -t 4 -m 1024
Core i7-920 (4 cores, no HT, 3.07GHz) ~94col/min -t 4 -m 2048
Core i7-920 (4 cores, no HT, 3.07GHz) ~91col/min -t 4 -m 4096
Currently running it at -m4096 even though it's slightly lower collisions to see if anything else is really getting a bonus from the large memory usage, but the 'sweet spot' for highest col/min is 1024/thread for me. Running at -m512 ended up only netting me 75-80col/min.
Also to note that using the same hardware as above i was getting ~90col/min on ptsminer v0.5a x64.
Anyone know what the larger memory footprint is meant to do? I assume keep more of the existing hashes in memory to provide references for collisions but I haven't actually seen it 'work that way' from what I've read and seen.