I currently have the Corsair Nautilus 500 running on my CPU and will overclock it after I replace my motherboard later this week. I have a QX9650. Should I keep the 500 or replace it with a Freezer 7? Or buy something else? I already have the 500 and Freezer, so not buying anything would be better than having to spend money.

Since you have both, try each and keep the one that gives you the better cooling. No need for anyone's opinions.

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if you do that [i hope] tell us how it goes... i was thinking of getting the nautilus, or buying seperate parts..or just sticking with air

Ok, sounds fair. I was curious as to whether others have tried both. I'm quite interested now since air cooling heatsinks have come so far since I bought my Nautilus 500 that I don't know which is better. I'll see if I can find some time this weekend and try them out. Thanks!