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Noctua-d14 lap or not ?

post #1 of 8
Thread Starter 
I've read some mixed reviews..some people are saying the noctua was designed so that the base of the cooler spreads the TIM? Has anyone lapped it and seen worse results than stock?
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post #2 of 8
i wouldn't do it with such an expensive cpu cooler. Try throwing some stronger fans that are like 100-150 cfm and see if its any better.
post #3 of 8
Quote:
Originally Posted by jach11 View Post
i wouldn't do it with such an expensive cpu cooler. Try throwing some stronger fans that are like 100-150 cfm and see if its any better.
I RMA'd my NH-14 because the base was actually concave. I could put a precision straightedge across it and see light through the middle of the base and I could see where the straightedge touched on either side. In theory, the base should be completely flat or slightly convex. I thought about lapping mine, but then I decided not to lap it since it cost me $90. I could have had a bad one though and yours could be fine. Definitely check it for flatness first.

When I did have mine, I tried two Akasa Viper 120 mm fans (83 CFM, 2.98 mm H20 static pressure) and got a couple degrees better temps, so you may want to try higher CFM fans.
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post #4 of 8
Thread Starter 
Awesome - my noctua is slightly convex when I used the razor test, im debating if I want to lap it...it's so little that it's hardly noticeable. Anyhow, will definitely get at least 70 cfm fans, I dont know why everyones so crazy about the Noctua fans.. they really dont move that much air.
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post #5 of 8
i say rma it unless you don't have a spare heatsink... if you lap it make sure you do up to 2000 grit if you can get a hold of 2500 grit then go up to that
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post #6 of 8
Thread Starter 
I am quite new to lapping.. when do you know to move up a grit level? For example.. if I start at 600.. how many runs do I do until I move up to the next level (800 or 1000grit)
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post #7 of 8
you will kind of feel how many runs you need to do. i would say about 40 one way, then turn the heatsink then 40 the other. so you get a nice cross hatch sanding. 600-1000-1500-2000 then grease/wet sand with 2000
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post #8 of 8
Thread Starter 
I fear my inexperience would only make the base worse. How much pressure should I be applying? Do I kind of just guide the thing along without adding any force of my own?
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