I quite like the idea of the separate and global stats tables, although im still not sure it would fix the points bickering.
Im not sure the points values really are that far out of line. For example, if you were to run a single GTX280/285, you could realistically expect between 7-9000 ppd from the card for an investment of £250 (for example). Similarly, if you spent that £250 on a core i7 processor and overclocked and run the linux smp client, i think you could realistically hit around 8,000 or more. In this respect, i think hardware of a similar age is actually quite comparable. Obviously, a core i7 is more expensive, as you need the motherboard/memory etc, but im not really sure stanford should have to take the 'costs' of folding into account [otherwise, (arbitrary arguement here!) is it not equally fair to award people in England more points than those in the USA because power costs a lot more per unit?]. From a pure hardware perspective, they earn approximately the same number of points. Obviously it is much easier to add extra gfx cards, and i dont think there is really an easy way to get around this.
Until gfx cards move towards a MIMD architecture (or is it SIMD... err...) and can process data in the same way as a CPU, it would be very difficult to design a becnmarking system that would allow for a fair comparison between the two technolgies. I guess its similar to the time predating the GPU client. This was before my time, but when quads were introduced, weren't people able to get loads of points really quickly, leaving others with duals/single cores in the dust? I think everyone has to accept to a certain extent that there will always be people who will spend more money/have more kit available etc, and im sure the whole thing comes around in cycles.
I also think that having high points for the gfx card clients is quite a good idea for the project as a whole. I would imagine if you were to take a sample of people on this forum, quite a lot of people would be using dual cores with a pretty decent gfx card, rather than a quad. Whilst it would be great to get everyone folding on their dualcore, it would be almost impossible for the person to compete in a global way with others with i7s etc, and so probably wouldnt bother (assuming all anyone cares about is the points here). However, of they can run a mid level gfx card and get pretty good points, it helps bring people to the project who otherwise would not have bothered (who would hopefully bring their dualcore along to the party as well!).
Not to knock the idea at all - genuinely, i would like to have a better breakdown of my points/scores, but im not sure it would really stop the arguements. I hope these points make sense... its quite a long post and its a Friday...
