Arctic Freezer 4U-M Is A Nice 4U Cooler Capable Of Cooling High-End AMD & Intel CPUs

First up I tested the Arctic Freezer 4U-M on an AMD EPYC 8534P "Siena" server for comparing to some recent other heatsinks tested there with that SP6 socket. The Arctic Freezer 4U-M went up against the Dynatron A54, NH-D9 TR5-SP6 4U and Noctua NH-U14S TR5-SP6 for cooling this 64-core / 128-thread Zen 4C server processor.

Over 14 hours of benchmarks were carried out while monitoring the CPU thermal performance:

Here's the results from that 14+ hours of continuous benchmarking across nearly 200 tests (see all the individual results here). The average EPYC 8534P temperature of 42 degrees was right inline with the two Noctua coolers tested and much lower than the Dynatron A54 -- while also being much quieter than the 2U Dynatron heatsink. The peak recorded temperature of 60 degrees with the Arctic 4U-M was even slightly lower than the Noctua coolers at 63~64 degrees.

I also tested this Arctic Freezer 4U-M on an AMD Ryzen Threadripper PRO 5965WX 24-core workstation. That workstation in a 4U chassis was running with a noisy Dynatron A38 that I was looking to replace due to some thermal throttling and the main motivation why I decided to order an Arctic Freezer 4U-M after stumbling across it online.

After a half-day of benchmarks on each heatsink, the Arctic Freezer 4U-M was doing much better and also avoiding some thermal/performance issues that had come up with the A38. The Arctic Freezer 4U-M had an average temperature of 66 degrees compared to 81 degrees with the A38 heatsink. The peak CPU temperature was also in much better shape with a 83 degree maximum on the 4U-M compared to 95 degrees with the A38.

I'm quite happy with the Arctic Freezer 4U-M purchase for cooling workstation/server processors within 4U enclosures while not being too noisy, not bulky to cause issues with dual socket servers, and being priced fair at around $60~65 USD while delivering performance comparable to more expensive Noctua heatsinks. Those interested in the Arctic Freezer 4U-M can find this Intel/AMD workstation/server-focused heatsink on Amazon.com (affiliate link) for $65 USD.