ARCTIC Liquid Freezer III AM4/AM5 Mounting Tip
For anyone having trouble installing, on one side slightly unscrew the two screws on the bracket, allowing it to lift slightly. This just gives you enough room to screw down the other side. Then once that has been screwed in a little bit screw back down the bracket and evenly screw the pump into the mount. Other than that really good performance over my NZXT Z63!

Great cooler, good value -- if it fits your case.
I’ve fitted this cooler to an AMD 5800X, power limited to ~100W, and it keeps that CPU well under 70C under sustained load. At idle it’s effectively silent and the fans are barely audible even when the CPU is fully cranked.

I’ve top-mounted it in a Phanteks P500A and this is where the only warning about buying this cooler comes in. The radiator for this cooler is thicker than most other brands (which helps the performance) and if you want to mount it in the top of your case you’ll have to be careful about the case, motherboard and RAM combination you go with. I bought the cooler before other components and it ended up driving my choice of case, which was a bit of a pain.

Great temps, pump sounds are a little high left on defaul
When under high load I would hear the pump sometimes even when I had my headphones in, I changed the pump power to 55% unless the CPU reaches 75 in my bios and it’s worked out great.

My i5-12600k runs around 25-30 ambient and max 55 under load, impressive stuff!

Pretty effective
When I built my new pc, I built it with thermals in mind. I always preferred air coolers, but case and cooler reviews at the time did not account for new generation RTX cards. I have an RTX 3080 and the main issue is not just the fact that it gives out more heat because it uses more power than previous generations, but also the fact that it has an exhaust on the right side that blows hot air straight up in front of the air cooler. You can’t cool your CPU with hot air. I was hitting 92C and throttling with Ryzen 9 5900X. After switching to a front mounted ARCTIC Liquid Freezer II 280 cooler, I now peak at 69C. A word of warning for anyone trying to fit this into Phanteks Eclipse P400A. Make sure you push the cooler downwards hard when screwing it in, otherwise it will interfere with the case power button and you won’t be able to push the button down to boot up. It is a very very tight fit.

Quite fiddly to fit without masking tape holding the rear cpu back plate on .
I Love this item ,but !! as a pc builder of many hundreds of custom pc’s it lacks on looks in some ways .
its is fiddly to fit with one person unless you use masking tape to hold the back plate on .
i could rant on about stuff here so i wont . it cools a cpu well ! it is not outstanding like a full cooling system but for the price it does just fine to very well indeed !
what can i cool with it ? my CPU on an AMD AM4 SOCKET 12 core 24 thread Ryzen 9 3900X /3950X .
power usage low as it works straight off the cpu fan an uses low power for fan and pump which is onto a fan on the exterior which cools the cpu plate directly almost but collectively even more .
the look is okay and this will fit inside many cases that are 280 mm radiator capable .
the length size is bigger than280 in length so please look at this if you intend to fit it in a smaller case .
i used the corsair air 540 case to support it . however a bunch of new cases may support this cpu cooler .
i even had it in a budget tiny compact Ionz case top mounted with some clever holes drilled in the pc case top . this was certainly temporary and as i love tinkering on it was very easy to do .
so to temperatures . i had this cooling a 3700X at one point also . just to test it out .
i decided to just leave it on normal settings for 24 hours and it was just fine with no cooling issues . on all teh cpu’s i tested it on . its been 6 months since ive tested it now . so my review is sound advice .
i willl not give you exact temps as this may not reflect the case and pc et up you may have .
however the cpu cooler works well . you will notice a slight difference in noise compared to the 240 or even the 360 versions with the bigger 140 fans it uses here just because they are bigger so spin at lesser speeds in general . hence the purchase . as i did not want something like a garden blower in my pc .
so the temps were slightly lower than the biggest AIR Noctua NHD 15 ? i think it is called . cant recall of hand ? but the good one . you will ll know it if you just want that option instead . or have room for it on your motherboard . where you have to watch the ram cooler height carefully .
so with that said the thing works and works well . i bought 2 of these in total to cool my friends system too . so pleased but worry about cleaning dust out that tiny fan if or when it builds up as i think a small long bristle paint brush may not do it as well when it comes to regular dusting of the cooler in general .
i would say a real value bonus for this price which unlike the very old versions from 2014 /15 which were terribly noisy . so got junked until some clever sod came up with this little beauty . the 280mm is the way to go if you happen have room in the top of your case to fit it . noise is low but will ramp up a bit under editing and multi core usage maxed out . which i done for one day also . sad fact is this is a cheap cooler at this price and you may not regret it . but as time goes on we shall see .

Great product but only rev 4 is compatible with my motherboard
This cooler is not compatible with Asus x570 ROG Strix motherboard. My unit was a rev 3 and this mounting mechanism is not compatible with this motherboard because it is interfering with the capacitors on the left of the CPU. I am waiting for more than 10 days now for Arctic support team to respond. Because of this issue temps are not great, but I hope I will get a rev 4 mounting kit.

UPDATE

After 15 days they responded and were very helpful. They sent the rev 4 kit(offset position is now compatible)+ some new paste. Temps are looking great and it is much easier to mount the cooler now with this new revision.

This cooler is a Chonke
First of all its a great AIO cooler, the temps at idle for my 3900X are about 25deg and under load abut 60 peak. The profile of the rad is a little thicker than the norm, so it didnt fit my case as an exhaust (motherboard VRM heatsink was too high) which in that case was width and it took some fanagling to get in as an intake. The fans are pre mounted and had to be flipped for intake, this was easy and the fans are daisy chained and tuck under the mountinf screws to stay flush with the fans shroud. Overall its a great cooler, one star off for the cpu mounting brackets, if you try to mount with the case vertical you need three hands (think they have fixed in newer models).

Works really well
No completely silent, but nothing ever really is it seems. Still, this is a very quiet cooler that does a very good job. However, this radiator is quite a bit thicker than those from other manufacturers, so please make sure it fits your case before committing to it! My system temperatures during heavy usage are way down with this Arctic unit compared to my previous Gamer Storm 120mm unit that this replaces. So much quieter as well, which was my main reason for purchasing. I certainly would recommend these all in one coolers from Arctic!