Originally Posted by quik_2_win
It's more likely that he's 'platform-limited' by his 800MB/sec "Rambust". Here lately people feel crippled by running PC2700 DDR which, in theory, offers over three times the bandwidth that he's feeding his CPU.
-suggestion, drop the 5900 in a modern dual-channel motherboard and then try those kinds of settings?
Actually dual channel pc2700 doesn't offer even twice the bandwidth off PC800(which was a dual channel config itself). DC pc2700 offers 5.4 GB/s DC PC800 offers 3.2 GB/s. While the extra bandwidth will help, it's doubtful that "only" 3.2 GB/s will be the the below the threshold where you get "acceptable" performance.