RAM COOLING??

How many degrees is hard to say it depend on your case cooling and ambient temperature, but it can make overal cooling of memory chips much better.
I am using Corsair Dominator memory modules (probably one of best memory cooling) and comparable to my old modules they went from very hot to just warm over 15° diference, but i have board where memory modules are quite close to each other.

thanks..

A good addition that gives some real help in ram cooling is this, as reviewed by jonnyguru:

http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

Its not exactly what you asked about, but it does tell that good ram colling is available at a reasonable price.

thanks again...