What gaming PC would you build for 1440p/4K and occasional AI work under $2,500?

A $2,500 budget gives you plenty of room, but don’t spend it evenly across every component. I’d target a high-end Nvidia GPU first if AI and video applications are important, then pair it with a gaming-focused Ryzen 7 CPU. Use 32GB of DDR5 initially, with the option to move to 64GB later if your editing or AI projects need it. A midrange motherboard with the connectivity you actually need, a 2TB SSD, and a good 850W power supply should be enough. A 240mm or 360mm liquid cooler is optional, not required; a capable tower air cooler will usually be quieter, cheaper, and easier to maintain.

One example build would be a Ryzen 7 7800X3D, a solid B650 motherboard, 32GB DDR5-6000 CL30 or CL32, a 2TB NVMe drive, an 850W Gold modular PSU, a well-ventilated mid-tower case, and a graphics card in the upper-midrange to high-end tier. Depending on current prices, that could be an RTX 5070 Ti, RTX 5080, or a similarly priced Radeon card. Radeon makes a lot of sense if gaming is the priority, but I’d choose Nvidia if you already know your AI tools require CUDA. Check the current GPU and bundle prices before buying, since those can change the entire balance of the build.

Put most of the budget into the graphics card, then choose a strong gaming CPU. A sensible list would be a Ryzen 7 7800X3D or 9800X3D, a quality air cooler such as the Phantom Spirit, a B650 or B850 motherboard, 32GB of DDR5-6000 memory, a 2TB PCIe 4.0 NVMe SSD, an 850W Gold-rated power supply, and the strongest GPU that fits the remaining budget. A reasonably priced case with good airflow is all you need; expensive RGB and premium boards usually don’t improve gaming performance. For AI work, Nvidia is generally the safer choice because CUDA and related software support are more widely available, even if an AMD card offers better gaming value.