Originally Posted by
JacekRing
Have no idea what quality the thermal paste they use on the Corsair water cooling system is. I typically apply Arctic Silver 5.
I know IC Diamond 7 is better then Arctic Silver 5, but not by much. maybe a 2-3 deg C drop on average between the 2. On stock Coolers you can expect maybe a 10c drop by replacing the paste with AS5. But remember not to put too much on because that can actually make your chip run hotter or short it out.
Edit: Also if you do ever delid, don't use IC Diamond on the Chip. As it's coarse and can damage the chip, so I've heard.