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Don't judge a CPU cooler by its looks. There are many subtleties in the design of tower coolers and fans, especially those from Noctua. Also, don't judge a cooler byits price. The Thermalright Peerless Assassin 120 SE is substantially less expensive than an NH-D15 but offers performance very similar to the Noctua. Certainly more than enough performance for a 5800X3D 10th AE.

Make sure you have a good backup of storage, especially the boot drive. As others have suggested, may as well do it all at once. Windows 11 is pretty good at coping with these changes, but be prepared to reinstall.

PCPartPicker Part List CPU: AMD Ryzen 7 9800X3D 4.7 GHz 8-Core Processor ($419.99 @ Amazon) CPU Cooler: Thermalright Peerless Assassin 120 SE 66.17 CFM CPU Cooler ($38.90 @ Amazon) Motherboard: MSI MAG B850 TOMAHAWK MAX WIFI ATX AM5 Motherboard ($199.99 @ Newegg) Memory: TEAMGROUP T-Create Expert 32 GB (2 x 16 GB) DDR5-6000 CL30 Memory ($449.00 @ B&H) Storage: Western Digital WD_Black SN850X 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive ($349.99 @ Amazon) Video Card: MSI SHADOW 3X OC GeForce RTX 5080 16 GB Video Card ($1349.99 @ MSI) Case: Lian Li LANCOOL 216 ATX Mid Tower Case ($98.99 @ Amazon) Power Supply: NZXT C850 (2024) 850 W 80+ Gold Certified Fully Modular ATX Power Supply ($116.99 @ Best Buy) Total: $3023.84 Prices include shipping, taxes, and discounts when available Generated by PCPartPicker 2026-05-26 21:38 EDT-0400

PCPartPicker Part List Case: be quiet! Pure Base 501 Airflow ATX Mid Tower Case ($104.99 @ Memory Express) Power Supply: SAMA G850 850 W 80+ Gold Certified Fully Modular ATX Power Supply ($97.74 @ Newegg Sellers) Total: $202.73 Prices include shipping, taxes, and discounts when available Generated by PCPartPicker 2026-05-25 20:17 EDT-0400

The Lian Li A3-mATX with a mesh side is a nice and inexpensive case, https://pcpartpicker.com/product/CjFmP6/lian-li-a3-matx-microatx-mini-tower-case-a3-matx-x. Available in black or white. Unless you own an NH-D15, save a bunch and get something like the Thermal right Peerless Assassin 120 SE, https://pcpartpicker.com/product/hYxRsY/thermalright-peerless-assassin-120-se-6617-cfm-cpu-cooler-pa120-se-d3.

The Arctic Liquid Freezer III uses a thicker radiator. It generally offers better performance as a result but does have issues in many cases when top mounting. Why not use a good tower cooler?

The memory isn't the best performing. PCPartPicker Part List CPU: AMD Ryzen 7 9700X 3.8 GHz 8-Core Processor (£243.50 @ Amazon UK) CPU Cooler: Thermalright Peerless Assassin 120 SE 66.17 CFM CPU Cooler (£29.99 @ Amazon UK) Motherboard: MSI PRO B850M-A WIFI Micro ATX AM5 Motherboard (£176.30 @ Amazon UK) Memory: Corsair Vengeance 64 GB (2 x 32 GB) DDR5-5200 CL40 Memory (£569.99 @ Amazon UK) Storage: Patriot P410 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive (£199.99 @ Amazon UK) Video Card: Asus DUAL OC GeForce RTX 5070 12 GB Video Card (£518.99 @ Overclockers.co.uk) Case: Lian Li A3-mATX MicroATX Mini Tower Case (£54.95 @ Overclockers.co.uk) Power Supply: Enermax Revolution D.F. 12 750 W 80+ Gold Certified Fully Modular ATX Power Supply (£102.43 @ Amazon UK) Case Fan: ARCTIC F12 PST 53 CFM 120 mm Fan (£4.99 @ Overclockers.co.uk) Case Fan: ARCTIC F12 PST 53 CFM 120 mm Fan (£4.99 @ Overclockers.co.uk) Case Fan: ARCTIC F12 PST 53 CFM 120 mm Fan (£4.99 @ Overclockers.co.uk) Total: £1911.11 Prices include shipping, taxes, and discounts when available Generated by PCPartPicker 2026-05-11 01:29 BST+0100

According to the cable illustration the PSU does not have a 12V-2x6 socket. I can't make out the sockets in the picture but I suspect it resembles which does not have a 12V-2X6/ 12VHPWR socket. Hence the suggestion to use the PSU supplied cable. The cable CP-8920349 is a suitable alternative. It differs from the stock cable only in the 12V-2X6 connector orientation.

Does the PSU have a 12V-2x6 / 12VHPWR socket? If not you should use the Corsair supplied cable straight through to the GPU. (Corsair used this scheme for some time. Likely believing it more reliable than the original 12VHPWR connectors.) Just make sure that the GPU connection is solid.

Among the many advantages of DDR5 over DDR4 is the availability of 64GB modules. This allows reliable 128GB two stick configurations. Check terms of any Revit software support. At one time Autodesk wouldn't provide support for consumer grade GPU.

Given the CPU and GPU I would not worry to much about fan placement, especially if you use the motherboard's fan utility to set fan profiles. Keep it simple. Perhaps three bottom intake and two top exhaust.

The Wraith cooler pushes air "down" over the CPU area. So it is drawing from the air stream above it. Front and bottom intake; rear and top exhaust for fans. Check motherboard fan header documentation. Many modern motherboards can control the speed of 3-pin fans so 4-pin PWM fans, while nice, are not necessary.

An on-site support contract does make sense in this situation. But you may not be limited to the three manufacturers mentioned. Some research may turn up one of more local system integrators (builders) that have Revit system expertise and offer appropriate support. If you haven't seen it already, https://www.pugetsystems.com/solutions/cad-workstations/autodesk-revit/hardware-recommendations/ offers a good summary of hardware options suitable for the application.

Regardless of when a purchase is made, it will always "just miss something good". It's the nature of rapid and constant technical improvement in this space. Not a fan of the term "future proof". But I do understand the desire to build a system that will satisfy needs for many years. Ultimately doing so comes down to available budget and the careful selection of parts for performance and reliability, eschewing bling when necessary.

The Liquid Freezer III Pro 360 already suggested fits in the case, offers good performance at excellent price point.