The 4000+ is a strange product by @MD, they took a FX-53 and locked the multiplier and renamed it a 4000+ what was up with that anyways? its a 2.4GHz chip with 1MB L2 cache.... the FX-53 has the same specs save and except the unlocked multiplier.... they could have AT LEAST made a 2.6GHz 512Kb L2 and name it 4000+ (which they very well could yuh never know these days)