Distributed.net

Tested speeds

AMD64 Client

AMD Opteron 6174

Dual Socket system (24 cores)

[Feb 19 16:43:25 UTC] RC5-72: Summary: 24 packets (24.00 stats units)
                      0.00:08:17.84 - [198.32 Mkeys/s]

As a note, dnetc was not able to detect the processor properly because it is a preproduction:

[Feb 19 16:35:07 UTC] Automatic processor type detection did not 
                      recognize the processor (tag: "40010001")

AMD Opteron 8435

Quad Socket system (24 cores)

[Feb 19 16:16:40 UTC] RC5-72: Summary: 24 packets (24.00 stats units)
                      0.00:12:18.67 - [139.55 Mkeys/s]

AMD Opteron 2356

Dual Socket system (8 cores)

[Feb 19 17:07:48 UTC] RC5-72: Summary: 16 packets (16.00 stats units)
                      0.00:12:19.47 - [72.86 Mkeys/s]

AMD Opteron 275

Dual Socket system (4 cores)

[Feb 19 17:17:58 UTC] RC5-72: Summary: 8 packets (8.00 stats units)
                      0.00:07:22.31 - [34.73 Mkeys/s]