Crucial stands up to its reputation: by building high quality sticks of memory.  Although only guaranteed with conservative timings, this particular stick overclocked extremely well, reaching speeds in excessive of a lofty DDR438.  But that fact remains that DDR333 is outdated: DDR400 is the current choice memory with Intel’s recent Canterwood and 800MHz Pentium 4 launches.  Matched pairs such as the Corsair TwinX could be the way to go for those looking into dual channel platforms, but if you choose to go with the 845PE or others supporting DDR333, the Crucial memory will serve you well.