Thermal Compound: As far as I remember, every Noctua cooler comes with its own thermal paste inside the box. It's worth checking the packaging list.
Operating System: You can buy just a key for £20 online or use any current one you have on new build.
https://uk.pcpartpicker.com/user/buro9/saved/jpq3wP
Getting closer now... settled on a 4TB M2 drive (reduced PCIE lanes needed compared to running 2).
Aside from that... it's mostly the same.
CPU: AMD Ryzen 9 5950X 3.4 GHz 16-Core Processor (£637.99 @ Box Limited)
CPU Cooler: Noctua NH-D15 chromax.black 82.52 CFM CPU Cooler (£89.99 @ Amazon UK)
Thermal Compound: Noctua NT-H2 3.5 g Thermal Paste (£11.99 @ Amazon UK)
Motherboard: Asus ProArt X570-CREATOR WIFI ATX AM4 Motherboard (£397.96 @ Scan.co.uk)
Storage: Seagate FireCuda 530 4 TB M.2-2280 NVME Solid State Drive (£660.00 @ Amazon UK)
Video Card: Asus GeForce RTX 3080 Ti 12 GB TUF GAMING OC Video Card (£1553.47 @ Ebuyer)
Case: Fractal Design Torrent RGB ATX Mid Tower Case (£238.04 @ CCL Computers)
Power Supply: be quiet! Dark Power 12 850 W 80+ Titanium Certified Fully Modular ATX Power Supply (£195.38 @ Box Limited)
Operating System: Microsoft Windows 11 Pro OEM 64-bit (£121.66 @ Amazon UK)
Case Fan: Fractal Design Prisma AL 103.85 CFM 140 mm Fan (£28.85 @ CCL Computers)
Total: £3935.33