but only got about 1C load temp drop vs my Freezer
It's a xigamtek kit called the crossbow. I just fitted one yesterday to my new P5Q Deluxe board.
) So backplate is probably ideal to be 100% sure it wont drop off. Im using pushpins and temps are not to bad. Highest ive seen temps is 65 deg on a uk sunny day using intel tat tool, 62 deg with prime95 for a few hours. This is with Q6600cpu at 3.6g so im happy that it was a good price/performance cooler. fan is always in pwm mode (900-1150rpm )so no idea what top speed is like. Its never made a lot of noise.I've just replaced my Arctic Cooling Freezer 7 Pro with the Xigmatek S1283 + Crossbow mounting kit. So for the benefit of the OP (if they're still interested) or anyone searching, here's what I found.
1. Definitely quieter than an AC F7 Pro.
2. Reduced my Q6600 fully loaded temps by around 10C - quite a surprise, I wasn't expecting that much.
3. The spoiler thing looked like it might not sit securely so I left it off - don't want to risk stray metal items dropping onto another component.
4. Don't know about anyone else, but I found installing the fan with the anti-vibration rubber mounts an almighty pain. Horrible system.
Well worth the money and time though.
I thought the anti vibration clip type things where easy to use and place in, 30 second job really.
First of all, they didn't want to go through the fan (I used the supplied one) and then, in my case at least, it was hard to get at the lower corners of the fan to secure them to the heatsink once the sink was mounted on the board in the case.