Permit me to refer you all to
this link which gives you some idea of what I had in mind. Two remarks: a G4 is not an Athlon 1000, but certainly not an Athlon XP2700+, and there are cases where it really doesn't make much of a difference what CPU you have. Also, you have to realise that a lower performance does not automatically mean 'unusable', 'unworkable' or 'unplayable'. My statement was: the CPU is preventing the card from running at full throttle.
Looking back at the data, I realise I may have to withdraw that statement as the memory bandwidth is much larger in case of the faster Athlon. So to lay the blame entirely at the feet of the CPU is probably not supported by the data, even though the article does not mention it. However,
something is holding the card back for sure. Since the AmigaOne does not have the bandwidth of the faster test system, I will uphold my opinion it is not necessary (nor financially wise) to plug in the fastest Radeon, especially since it will take a good while before games appear which tax the hardware to its limits.
On a side note, good developers will strive to minimize AGP traffic once the program is running, and utilise every last byte of fast RAM on the card before falling back to much slower main memory. Therefore AGP 8x (or even 16x) doesn't mean an awful lot if the only intensive traffic across the bus is during the initialisation stage. AGP 8x and 16x are marketing tricks.
