Installation
At Icrontic, we test heatsinks on both Intel and AMD platforms. As we discovered in our first heatsink roundup, performance can vary greatly between sockets. This is often due to differences in mounting systems. Our testing methodology and standard test configuration are explained in detail here.
Intel LGA 775 Installation
We had no issues mounting the NH-U9B on our Intel test rig. Noctua’s Secu-Firm mounting system has once again impressed me.
The LGA775 brackets are slightly different than those included with the NH-U12P. Noctua has permanently affixed threaded posts to the brackets. This ensures that a screw can not penetrate sensitive motherboard capacitors or coils beneath. On the flip side, it is a little more difficult to remove the NH-U9B if you use sticky thermal compound like Arctic Silver Ceramique. The posts prevent the heatsink from being rotated to break it loose. Its a trade off, but I think the extra security of attached posts outweighs this.
The backplate is still our preferred ‘X’ shape for LGA 775 systems. It stays out of the way of protruding pins at the rear of the motherboard.
The backplate is slightly different compared to the one included with the NH-U12P. It no longer has the adhesive padding on it. I never removed the tape backing as I frequently remove the heatsink. The revised backplate offers lots of padding to keep the motherboard safe and to prevent shorts. This is a definite improvement in my opinion.
I had no clearance issues with our Asus P5K-E. The final product is an impressive sight.
AMD Socket AM2 Installation
Socket AM2 installation was a little more involved, but provided a very secure mount.
The brackets mount using thick plastic spacers. There are insulating washers below.
The backplate is the same size and shape of the OEM backplate, so compatibility is likely with just about any AM2 board.
The NH-U9B allows for 45 degree rotation. I used the alternate mounting frame to allow for this. The only part of the installation that was a bit unclear was that the spring loaded mounting screws need to be put in place before the mounting frame is attached. Otherwise, the screws will not fit beneath the fin bank.
In the end, we have a very sturdy mount. Again, the Secu-Firm mounting system is top notch!
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