but with an 8gb ram, superfetch is really good. and readyboost compliments the superfetch with extra memory. true sequential read/write of hdd is fast but random read/write is a lot better in flash memory.
on my first notebook toshiba satellite (dual core pentium, 2gb usable ram) i used it and in one case it add my winsat aero graphic assessment with +.1
dont know why maybe because of superfetch/readyboost.
just weeks ago i dedicated two flash memory on my new samsung netbook (atom with 1gb usable ram) and saw results. also in the winsat aero graphic asessment i found additional +.1.just have to repeat the test to cached it in memory.