Which memory is faster DDR2 PC2-6400 or 5300

[Guest]

which memory is faster for a lenovo thinkpad x61s series laptop? DDR2 PC2-6400 or 5300

 

[Emerald]

usually the 6400

 

[geekapproved]

The higher number designates a faster speed.

However, having said that, PC5300 with a cas rating of 5 is as fast or faster than PC6400 with a cas rating of 7.

So in most cases the 6400 would be faster, but you failed to mention the timings.