CACHE is not legal tender in most countries, but a type of memory that your CPU (central processing unit ) first looks for. It does this, not to be awkward, but more because it is fastest route, from a users point of view.

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OK, OK, so what's bottom line?

So, bottom line is, moving from CAS-3 to CAS-2 will offer a percentage performance increase in low single digits for most applications. Programs which are known to be memory intensive (you gamers might know of some...) will see best improvement. The other thing to keep in mind is that CAS-2 memory will run FASTER ( some review sites have taken it to 160MHz!) than CAS-3 memory. So, if you're thinking of overclocking your system (now or in future), CAS-2 is your best bet for speed and stability.

So...

Buy CAS-2 if [1] you want to wring last bit of performance out of your system, or [2] you're thinking of overclocking, either now or in future, or [3] it costs same as CAS-3, which it sometimes does... Otherwise, CAS-3 memory should meet your requirements

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