ASUS ProArt LC 420 All-in-one CPU Liquid Cooler with Illuminated System Status Meter and Three Noctua NF-A14 industrialPPC-2000 PWM 140mm Radiator Fans

Excellent built quality! Installation is very easy. Metal fans are stunning! Strong and low noice! With the ASUS software, the fans can be individually tested and stopped. I am using AMD9950X3D. With CPU tested to 100%, the water pump barely reaches 100% and temperature remains less than 80 degC. Although a bit expensive, it is a very good, rigid and reliable liquid cooler.

Easy to install, fits well in my PA602, gives a refreshing look to my old parts

Thermals are great with my 9800x3d, never above 60 degrees. No noticeable pump sounds (been a few months). Complements ProArt x870e and PA602 case very well. I would really only suggest this cooler if you had other ProArt components in your build. Otherwise, I’d just go with a cheaper AIO. I did swap out the 3 noctua 140mm industrial fans with 3 Noctua A14 140 PWMs fans. Not necessary, just wanted to min/max fan noise. But if you were wondering how easy they are to swap out, I had no issues.One suggestion. This product was not showing up on the newest version of Asus Armoury Crate. I believe it was recently updated at the time and I read stories online of how Armoury Crate is a mess after an update. If it doesn’t show up for you, download the previous version of Armoury Crate. That’s what worked for me.

So, I've been using the ASUS ProArt LC 420 AIO cooler with my i9 14900K, and it’s been rock solid. Even when I'm pushing the system hard with video rendering and gaming, the temps stay well under control—rarely going over 85°C.One thing I like is that it doesn’t go overboard on flashy nonsense. It’s just a clean, all-black cooler that fits in with my build. No RGB, no distractions—just does its job quietly in the background. Speaking of quiet, it’s impressively low-noise most of the time. It ramps up a bit when the system’s under load, but it’s still quieter than a lot of other coolers I’ve used before.Installation was pretty straightforward, though you’ll want to make sure you’ve got a big enough case since it’s a 420mm radiator. If you’ve got the room, it’s no hassle at all.All in all, it’s a no-nonsense cooler that handles the heat of a 14900K really well. If you’re after reliable cooling without all the RGB craziness, I’d say give it a shot. It just works, and that’s exactly what I need it to do

The media could not be loaded. This 420mm AIO cooler is definitely a mixed experience. On the positive side, cooling performance is outstanding — I’d give it a solid 5 stars. The fans (essentially Noctuas) are whisper-quiet, and thermals are excellent.But the details left me disappointed. Under heavy CPU load, when the pump ramps up, there’s a noticeable buzzing or electrical-like hum. I tried tweaking BIOS power settings with no success. At idle or low power, it’s silent, but during demanding workloads the noise is so irritating that it makes it hard to concentrate on work. What makes this worse is that ASUS is still using an older pump platform here, which feels dated compared to the newer Asetek Gen 9 designs that are both quieter and more refined — and those can actually be found in cheaper AIOs.Another letdown is the lighting. I assumed it was RGB since it claims Aura support, but it’s actually locked to a fixed bluish color (around 8000K). Not even close to pure white — really disappointing for a premium product.Lastly, the tubing doesn’t hang naturally; it feels stiff and twisted once installed, which makes the build look less clean than expected.Pros:Excellent cooling performanceUltra-quiet fansSleek overall designCons:Pump makes buzzing noise at high load (older-gen design, not as refined as Asetek Gen 9)Lighting is not true RGB, stuck in bluish toneTubing is stiff and awkwardVerdict:If all you care about is raw cooling and quiet fans, this cooler delivers. But for the price, I expected better polish in pump acoustics, lighting, and tubing design. Considering you can buy AIOs with newer Asetek Gen 9 pumps at a lower cost, the value proposition here just isn’t convincing.

This AIO fits perfectly with the PA602 case I got, also part of the proarts series. The fans appear very high quality and very aesthetically appealing. The overall build quality seems good.

-In my PA602 I cannot align these holes to screw in and fix it. unacceptable issue-Always has noise near the radiatorNothing else I can say. It is already in my 602 case and I will not waste my time to uninstall and return it. PA’s quality doesn’t match their reputation.

I purchased this AIO to match the ProArt case to match. However, for both a 9800x3d and 9950x3d CPU, it was not meeting the muster. Temps we're much higher than expected. Even attempted with many different pastes but it didn't change the high temps on the CPUs. I later switched to the Arctic Liquid Freezer 3 AIO and I had a 15C difference.The AIO looks beautiful when paired with the ProArt case it was intended for. However, not at all great for cooling. If you want aesthetics then by all means, go for it. If you want performance, I'd steer clear.