Noctua NF-A20 PWM, Premium Quiet Fan, 4-Pin

This is a perfect drop in replacement for the stock 200 mm fan in the Thermaltake Core V1. No modifications to the case or fan were required.Performance and Quality. The fan is well built, attractive and performs excellently, as one would expect from Noctua. Even at full speed, the fan is barely audible - much quieter than my stock Intel CPU fan even at idle speeds. As a PWM fan, of course, it doesn't have to run at full speed. I'm normally running it at about 60% and I never even hear it. It effectively cools my system built on an Intel 65W Core i5 running at stock speeds, 16 GB RAM, Samsung 970 Plus M.2 SSD and 2 Samsung 860 SATA SSDs.Installation: Use the inner set of mounting holes on the Noctua NF-A-20. They align perfectly with the mounting holes used for the stock fan and make it possible to use the original mounting screws that came with the case. The Noctua fan is a hair thicker than the stock fan, potentially bumping it up against the front cover of the case. I removed the rubber vibration dampers from the Noctua fan just to be sure I had sufficient clearance. Absolutely no issues with vibration noise. I mounted the fan so that the wiring passed through front wall of the of the case by the small rectangular cutout at the bottom. It was close, but the wiring can enter this way with no pinching or rubbing of the wires. If you are happy with the wires entering through the top of the case, that path is wide open. Mounting the fan with the wiring on the side, though, may pinch the wires. Mounting the fan as I did, I needed the included 4 pin extension cable to reach the fan header on my motherboard.

I bought this as a replacement for the stock fan in my CM Trooper since it started making a horrible grinding noise which kept getting worse over the last few months.I was hesitant to buy this particular fan due to many reviews stating this fan being oversized and not fitting, plus my case wasn't listed on the official compatibility table either.But there are not a lot of good options for 200mm fans and most had some kind of flaw.The Noctua's are touted as the best on the market and the only flaw seemed to be its size. So I went ahead and chanced it, with the plan to return it for 2 smaller fans if it didn't fit.To my surprise, it fit great! The screw holes were only slightly off and I was able to install with no issues.The fan comes with several different mounting options - standard mounting screws and also 2 styles of anti-vibration mounts. I went with the anti-vibration mounts which made installation even easier since you just pull the flexible strands thru the holes, no tools required. It took longer to figure out how to take my case apart to get to the top fan than actually installing it.Turned on the PC and no more grinding sound! I'm about a week in, so will be interesting to see how things are a month/year down the road, but so far this thing is quiet and provides great airflow. Definitely lives up to its reputation.

I have built and modified computers for years and tried a lot of different fans. Nothing beats Noctua for airflow and quiet operation. I won't use any other brand.

Fan works great, temps dropped a few degrees in PC. It was a tight fit getting fan in, this might be a case issue, very happy with outcome