PC3200 is backwards compatible anyway, so it should work fine with your system. What FSB does your 2.4 run at, there were 400mhz FSB northwoods, 533mhz FSB northwood and non-Ht prescott, and 2.4c 800mhz FSB with HT. PC3200 should work fine with any, but will only be fully utilized with a 2.4c with 800mhz FSB.