Noctua's NH-U9 TR4-SP3 Is Still The Best 4U EPYC / Threadripper Cooler I've Found
If you are in the market for an AMD Ryzen Threadripper or AMD EPYC heatsink that fits within 4U height requirements, the Noctua NH-U9 TR4-SP3 is still easily the best option available. I'm now running the NH-U9 TR4-SP3 in five different EPYC/Threadripper systems in the racks and they work out splendid...