Ignoring the total, the fermat test on the GPU gives 1000x fewer 2-chains, and 100x fewer 4-chains. This is with 2 x 7950, a AMD FX(tm)-4130 Quad-Core Processor, and ubunutu 13.
Am I missing something somewhere?
Likely not it may be my settings or some other factor (mingw compiled vs native linux etc). I have a very weak CPU in there (Celeron G530 I think) that gets maxed out when the CPU test is going (against 2 GPUs).
cpu_mining_threads 2, worksize 64, aggression 23, sievepercentage 10, sievesize 25165824
CPU: 350.824k 2-chains 33.2151k 3-chains 3.13091k 4-chains 318.715 5-chains 18.7479 6-chains
GPU: 502.131k 2-chains 45.7112k 3-chains 4.8202k 4-chains 392.074 5-chains 46.1263 6-chains
I have a faster quad-core laying around, I will give that a try when I get a moment.