ARCTIC Freezer 4U-SP5 Provides Effective Cooling For AMD EPYC 9004/9005 CPUs
One of the only issues I had with this heatsink was that it's slightly wider than other 4U tower coolers. While the Freezer 4U-SP5 does tout 53mm for RAM clearance, its slight overhang of the heatsink fins may complicate some setups such as if using active RAM cooling on top given today's speedier DDR5 server memory. The wider Freezer 4U-SP5 was impairing a clean mount of the Corsair Vengeance Airflow Memory Cooling and thus the memory cooling mount had to be attached in a more angular fashion. But if you don't have tall DIMMs or any active memory cooling solutions, the Freezer 4U-SP5 should work out just fine.
👁 ARCTIC Freezer 4U-SP5 install
Currently the ARCTIC Freezer 4U-SP5 is listed for only $55 USD on Amazon.com (affiliate link). This is a very nice price in comparison to other 4U server heatsinks/coolers. The list price on this heatsink is ~$135 and other Xeon/EPYC air coolers can easily retail for above $100 USD. At $55 USD this is nice value in 2025 for server cooling.
👁 ARCTIC Freezer 4U-SP5 installed top view
My testing of the ARCTIC Freezer 4U-SP5 was primarily with the EPYC 9655(P) 96-core processor with a 400 Watt TDP. It's the same setup as I've been using for other AMD EPYC 9005 series cooling testing with the AMD EPYC 9655(P), Supermicro H13SSL-N, 12 x 64GB DDR5-6000 memory, Rosewill 4U chassis, 3.2TB Micron 7450 NVMe SSD, and running Ubuntu 24.10.
For over eight hours of continuous testing, the ARCTIC Freezer 4U-SP5 was performing very well and nearly matched the cooling capability of the SilverStone XE360-SP5 all-in-one CPU liquid cooling of this AMD EPYC 9655 96-core processor. The Freezer 4U-SP5 cooler was slightly more effective than the SIlverStone XED120S-WS at cooling this EPYC Turin CPU while the ARCTIC Freezer is much cheaper at ~$55 USD compared to the XED120S-WS currently retailing for $170 USD.
👁 ARCTIC Freezer 4U-SP5 cooling AMD EPYC Turin
All in I am very satisfied with the all-around performance -- both the cooling and noise level -- of the ARCTIC Freezer 4U-SP5 for cooling high-end AMD EPYC server processors while also being cheaper than other Socket SP5 heatsinks for fitting within 4U height requirements. Thanks to ARCTIC for sending over this review sample and those wanting to learn more about this cooler can do so via Amazon.com (affiliate link).
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