It all depends on the individual work unit you are working on too. There are some 21 and 24 point Gromacs out there and there also are some 230 pointers too. Before Stanford reworked the points on Tinker work, the Gromacs work was the best units to get for points production but when Stanford switched benchmark machines to the P4 2.8 from the Celeron 500, the Tinker points worth went up a whole bunch. That is due to the P4's weak native FPU unit and Tinker not using any SSE or SSE2 optimizations, which is weaker than even the old Celeron's or P3's FPU unit. Since the Athlon and Duron processors have a much superior native FPU unit they are much more efficient at non-optimized Tinker wu's, which makes them produce a higher points/hour on Tinker wus.