Were you also folding on the CPU cores? If so would that account for the PPD difference?The i3 won't hold you back. The Pentium, not so sure. During the brief period when I GPU-fold, I had two rigs with GTX 570: one with an Intel i7 950 and one with an AMD X3 450 CPU. The system with the Core i7 produced almost a third more points than the one with the low-end AMD CPU.
You can see the daily output of the individual clients on the same system. The GPU client's production was lower on the low-end AMD system than it was on the Core i7 system. The CPU wasn't participating on the AMD system because I didn't feel it was worth it. Its contribution was too low to justify the increased electrical consumption.Were you also folding on the CPU cores? If so would that account for the PPD difference?