I already have monitors, a keyboard, a mouse, and the other peripherals, so the entire budget can go toward the PC itself. I'm fairly new to choosing components and would appreciate advice on whether an Nvidia or AMD graphics card makes more sense, along with specific parts that offer good value right now. I'll probably buy components in the UK, although I may order from Amazon US if the prices and warranty situation are worthwhile. The main use will be demanding gaming, and I want enough performance to play modern titles at high settings without constantly lowering the graphics quality. I'd prefer to stay at or below $3,000.
3 Answers
A strong starting point would be an AM5 system with a Ryzen 7 9800X3D, a B850 or X870 motherboard, 32GB of DDR5-6000 CL30 memory, a 2TB NVMe SSD with onboard cache, and an 850W Gold-rated power supply. For the GPU, compare an RTX 5080 with a Radeon RX 9070 XT based on current UK pricing. Either should be excellent for high-end gaming, so the better deal may decide it.
The RX 9070 XT generally offers strong rasterized gaming performance and can be the better value option, while the RTX 5080 is usually preferable if you care about ray tracing, DLSS, CUDA-related software, or other Nvidia features. Check independent benchmarks for the games and resolution you use, then compare total prices rather than choosing purely by brand. A 16GB Nvidia model could also make sense if it fits the budget.
You should be able to build a very capable system around the 9800X3D and RX 9070 XT without exceeding the budget. Availability and pricing change frequently, so check several UK retailers and make sure the parts list includes memory, cooling, storage, and a quality power supply. If you have room left in the budget, put it toward the GPU rather than overspending on the motherboard.
Are these parts usually easy to find at reasonable prices, or should I expect availability problems?

What are the main differences between those GPUs? I’ve heard mixed things about Nvidia recently and I’m not sure how the current cards compare.