# ARCTIC Liquid Freezer WS360-SP6 Review: sTR5/SP6 AIO Fit, Limits, Who Should Skip > 360mm AIO for sTR5/SP6 only: socket fit, 66 mm depth, 350W Threadripper limits, and who should pick air cooling instead. Tags: cpu-cooler, arctic, liquid-freezer-ws360-sp6, aio, sp6, str5, threadripper, workstation Source: https://www.amazon.co.jp/dp/B0FVXP5JPK Article page: https://web-autoai.com/articles/arctic-liquid-freezer-ws360-sp6-aiocpu?lang=en Prices and ratings change over time — check the article page for the current values. --- This article covers the ARCTIC Liquid Freezer WS360-SP6 — Workstation AIO Liquid Cooler for SP6/sTR5 Sockets, including which platforms it fits, case clearance, and where it is the wrong choice. ## Overview The ARCTIC Liquid Freezer WS360-SP6 is an all-in-one liquid CPU cooler with a 360mm radiator. It is built only for AMD's SP6 and sTR5 sockets, which serve workstations and entry-level servers. The short answer: if you are building a Threadripper 7000/9000 or EPYC 8004 system in a tower case, this is one of the few AIOs that fits out of the box, which makes it a strong pick. On any other platform, there is no reason to buy it. Consumer AIOs have cold plates sized for the small heat spreaders on AM5 or Intel LGA1700/LGA1851. SP6 and sTR5 CPUs have very large packages with several CPU dies spread across a wide area. If the cold plate is too small, the outer dies do not get cooled properly. This model uses a copper cold plate with micro-skived fins, plus a dedicated mounting kit, to cover the whole package. The radiator is 360mm aluminum, with three 120mm fans (P12 Pro CO, up to 1600 RPM, dual ball bearings). Dual ball bearings are known for handling heat and continuous operation well. That makes them a sensible choice for workstations that render or compute for hours at a time. On Amazon. co. That is positive, but the sample is small, so treat it as a rough signal. ## Compatibility Guide ### Supported Sockets Only two sockets are officially supported: AMD SP6 and AMD sTR5. sTR5 is the socket for Threadripper 7000/9000, including the PRO models, on TRX50 and WRX90 chipsets. SP6 is the socket for EPYC 8004. The two reportedly share the same mounting dimensions, so one cooler covers both. | Platform | Status | |---|---| | AMD sTR5 (Threadripper 7000/9000) | Supported | | AMD SP6 (EPYC 8004) | Supported | | AMD AM5 / AM4 | Not supported | | Intel LGA (all) | Not supported | | Older Threadripper (TR4 / sTRX4 / sWRX8), EPYC SP5 | Not listed | The older Threadripper sockets, and the larger SP5 socket used by EPYC 9004/9005, are not on the support list. You may see claims that the mounting holes are similar. Even so, using the cooler on a socket the maker does not support risks poor cooling and a void warranty. Plan to use it only on the listed sockets. ### Power and Fan Headers The cooler connects to a 3-pin or 4-pin PWM fan header. For fine speed control, use a 4-pin PWM header on the motherboard, such as CPU_FAN. Some workstation boards have basic BIOS fan controls, so check that you can set a fan curve based on CPU temperature. That way you won't end up with a loud system you cannot tune. ### Case Fit and Dimensions The listed dimensions are 398 x 120 x 66 mm. A 398 mm length is typical for a 360mm radiator. The 66 mm figure appears to be the radiator with fans attached; check the product page for the exact breakdown. - It can mount a 360mm radiator at the front or top - If top-mounted, the roughly 66 mm thickness does not hit the memory or VRM heatsinks along the top of the motherboard - The tubes can comfortably reach from the CPU socket to the radiator sTR5 and SP6 motherboards are usually large formats such as E-ATX or EEB, with memory slots on both sides of the socket. In a mid-tower, the gap between a top radiator and the memory gets tight. A full-tower case is the safer assumption. ### Rack-Mount Chassis EPYC 8004 often goes into rack servers, but a 2U or 3U chassis almost never has room for a 360mm radiator. Even a 4U chassis may not fit it, depending on how the fans are arranged. For rack deployments, use the heatsink or server air cooler that the chassis maker specifies. ### Airflow for Memory and VRM An air cooler also blows air around the socket. An AIO moves the heat to the edge of the case, which can leave the air around the socket stagnant. sTR5 and SP6 systems carry multi-channel DDR5 RDIMMs and high-current VRMs, so set up your case fans to push air across the board. ## Product Info | Item | Listed Value | |---|---| | Cooling Method | Liquid (AIO) | | Radiator | 360mm, aluminum | | Fans | 120mm × 3 (P12 Pro CO) | | Max Fan Speed | 1600 RPM | | Fan Bearing | Dual ball bearing | | Noise Level | 0.08 sone | | Airflow | 12 m³/h | | Cold Plate | Copper (micro-skived fins) | | Supported Sockets | AMD SP6, sTR5 | | Dimensions | 398 x 120 x 66 mm | On Amazon. co. Check the retailer's page for the latest price. Prices in this range swing a lot with sales and stock. The box reportedly includes three P12 Pro CO fans, a mounting kit, and thermal paste. The warranty is described as 6 years, but terms can differ by seller, so confirm them on the store page and in ARCTIC's warranty policy. The listed airflow of 12 m³/h is extremely low for a 120mm fan. Typical 120mm fans are rated in the tens of CFM, so this is likely a different test method or a listing error. The 0.08 sone noise figure also depends heavily on how it was measured. Don't compare this cooler against others on these two numbers alone. ## Comparison With Other Cooling Options | Option | Best For | Drawbacks | |---|---|---| | This cooler (SP6/sTR5 360mm AIO) | Quiet, heavy workloads in a tower case | Adds a pump as a moving part; less airflow around the socket | | Consumer 360mm AIO | AM5 / Intel gaming or creator PCs | Won't mount on sTR5/SP6, or can't cover the large package | | Large SP6/sTR5 air cooler | Machines that can't go down; rack chassis | Tall; can clash with memory or the case | | Custom water loop | Running 350W-class chips flat out | High cost, effort, and maintenance | It may look like a consumer 360mm AIO, but the cold plate and mounting hardware are completely different. It is tempting to think a bracket would adapt a regular 360mm AIO. However, a small cold plate leaves some CPU dies uncovered, and temperatures stay high. If you want an AIO on sTR5 or SP6, a purpose-built model like this one is the starting point. ## Installation and Operation Tips - **Don't make the pump the highest point.** Every AIO holds a little air. If the pump (the CPU block) sits at the highest point of the loop, air collects there and causes noise and weaker cooling. Mount the radiator on top, or at the front with the tubes at the bottom. - **Spread the paste across the whole surface.** sTR5 and SP6 heat spreaders are several times larger than consumer CPUs. A single small dot may not reach the edges, so use a method that covers the whole area. - **Keep the fan curve gentle.** Threadripper raises its clocks as long as it has thermal headroom. High temperatures under load are not a fault in themselves. A gradual fan ramp keeps the system quiet during short spikes. - **Clean the radiator regularly.** In machines that run 24/7, dust clogging the fins is the main reason cooling gets worse over time. ## Who Should Buy - **Threadripper 7000/9000 builders making creator or dev machines.** If your work loads every core for hours, like 3D rendering, video exports, or large compiles, you'll benefit from the 360mm radiator and fans built for continuous use. - **Small-server and homelab users running EPYC 8004 in a tower case.** Most EPYC 8004 models draw relatively little power, so a 360mm radiator cools them with room to spare. It also suits anyone who wants less fan noise than an air cooler. - **Noise-conscious users.** Three fans share the heat load, so each fan can spin slower at the same load. - **People who want to avoid a heavy, tall air cooler.** Big air coolers can overhang the memory slots and strain the board during transport. An AIO keeps the socket area clear. ## Things to Check Before Buying **Confirm your socket. ** This cooler fits only SP6 and sTR5. Threadripper 1000 to 3000 series (TR4/sTRX4/sWRX8) are not on the support list. Check your board's chipset (TRX50 or WRX90) and socket name before buying. **Headroom is limited on 350W-class CPUs. ** The top Threadripper 7000/9000 models are 350W TDP parts. A 360mm AIO is fine for normal use. But if you run every core for hours, or raise the power limits with PBO, the fans will tend to sit at high speed. For that kind of use, also compare larger radiators or a custom loop. **Consider air cooling for machines that can't go down. ** An AIO has a pump that moves, and over time pump failure or coolant loss is inevitable. If the pump stops, the CPU hits its temperature limit almost at once. For servers that can't afford downtime, an air cooler that only needs fan swaps is lower risk. If you do use an AIO, set up temperature monitoring and alerts. **On a regular PC it doesn't just go unused, it won't fit. ** If you want a 360mm AIO for an AM5 or Intel machine, choose a model made for standard sockets, such as ARCTIC's regular lineup. **Watch for inconsistent listing data. ** The listed airflow of 12 m³/h is implausibly low for a 120mm fan and may be a listing error. In the price data, some store labels also didn't match the store the link actually went to. When you open the product page, confirm the product from the photos, the model name (WS360-SP6), and the socket list. Cross-check the numbers against ARCTIC's official information. ## FAQ **Q: Can I use it on an Intel CPU or AM5? ** A: No. It supports only AMD SP6 and sTR5, not Intel LGA or AM5/AM4. **Q: Does it work with both Threadripper 7000 and 9000? ** A: Yes, both use sTR5. The socket is sTR5 on both TRX50 and WRX90 boards. The top models are 350W-class, so weigh the cooling headroom against your workload. **Q: Will it fit older Threadripper sockets (TR4 / sTRX4)? ** A: They are not listed as supported, so don't count on it. **Q: How much space does it need in the case? ** You need a 360mm radiator mount. If you mount it on top, also check that the roughly 66 mm thickness clears the memory and VRM heatsinks. **Q: Can I replace the included fans? ** A: Yes. They are 120mm fans, so standard 120mm, 25mm-thick fans will work. A fan with a different thickness changes the case clearance, so check the dimensions first. **Q: Is it OK to run it 24/7? ** A: Dual-ball-bearing fans are built for continuous operation. The pump, however, wears out over time. Pair the cooler with temperature monitoring, and consider air cooling where downtime isn't acceptable. ### Product Disclosure (Amazon) - Manufacturer: ARCTIC - Seller: ARCTIC HK Ltd - Fulfilled by: Amazon - ASIN: B0FVXP5JPK - Note: This article covers a manufacturer-made product based on Amazon listing details.