PC2-5400 (DDR2 667MHz) memory is probably far from the minds of computer enthusiasts, as DDR2 and DDR3 have advanced to much higher speeds. But OCZ Technology has a PC2-5400 product that just might appeal to those with a compatible system looking for a serious upgrade in the memory department! The OCZ Technology 4GB PC2-5400 Vista Upgrade Edition DDR2 kit provides two 2GB modules rated at 5-5-5-15 timings that could easily breathe new life into a 'late model' AMD AM2 or Intel based system.