Max budget option:
I know nothing about 4K monitors, don't buy it.
I chose the Zotac just because it has a 5 year warranty, don't know if it has a good cooler or not.
The THOR II is silly expensive, but at this kind of power usage, a platinum PSU might actually be a good use of the budget, if you use the PC a lot. It has a native 12/16 pin for the new cards. If you don't mind Gold, I'd get the Toughpower GF3 1000 Watt instead (-£100).
The board has PCI-E 5.0 for the graphics card and for one M.2. If you don't care about that, I'd downgrade to the TUF B650-PLUS WIFI (-£100).
I included an M.2 SSD because you're still using a hard disk and a SATA SSD.
With your budget, best to wait for the X3D CPUs if you can, but if not I'd go with the 7700X or 7700.
Zotac GeForce RTX 4090 Trinity 24GB GDDR6X PCI-Express Graphics Card - £1,649.99
Phanteks Eclipse P600S Silent Midi Tower Case - Black - £139.99
ASUS ROG THOR 1000W Platinum II Modular Power Supply - £314.99
Arctic Liquid Freezer II High Performance CPU Water Cooler - 360mm - £119.99
AMD Ryzen 7 7700 Eight Core 5.30GHz (Socket AM5) Processor - Retail - £338.99
Asus TUF Gaming X670E-Plus WIFI (Socket AM5) DDR5 ATX Motherboard - £349.99
Kingston FURY Beast 32GB (2x16GB) DDR5 PC5-48000C40 6000MHz Dual Channel Kit - £169.99
WD Black SN770 2TB SSD M.2 2280 NVME PCI-E Gen4 Solid State Drive (WDS200T3X0E) - £149.99
ASUS TUF 28" VG28UQL1A 3840x2160 IPS 144Hz 1ms HDMI 2.1 FreeSync/G-sync Gaming Monitor - £748.99
Grand Total: £4,010.93 (includes delivery at £28.02)
Cheaper option:
I know nothing about 4K monitors, don't buy it.
Says in the datasheet of the SSD that it is backwards compatible with older PCI-E versions, so it should work alright in your board.
The BIOS would need updating before the X3D is installed.
I'm not sure what memory works nicely with an X3D, but you'd get bigger capacity and faster speed with these sticks.
I don't know if it is viable to use your existing case and cooler? What is the PSU?
Zotac GeForce RTX 4090 Trinity 24GB GDDR6X PCI-Express Graphics Card - £1,649.99
Thermaltake Toughpower GEN5 GF3 1000W Fully Modular ATX 3.0 80 Plus Gold Power Supply - £199.99
AMD Ryzen 7 5800X 3D Cache Eight Core 4.5GHz (Socket AM4) Processor - Retail - £389.99
Corsair Vengeance RGB Pro 32GB (2x16GB) DDR4 PC4-25600C18 3600MHz Dual Channel Kit (CMW32GX4M2D3600C18) - £110.00
WD Black SN770 2TB SSD M.2 2280 NVME PCI-E Gen4 Solid State Drive (WDS200T3X0E) - £149.98
ASUS TUF Gaming 28" VG289Q1A 3840x2160 4K IPS 60Hz FreeSync/A-Sync Widescreen Gaming Monitor - £338.99
Grand Total: £2,851.24 (includes delivery at £12.30)
