This 4K PC build is structured around a single priority: giving DOOM Eternal's GPU-heavy rendering path everything it needs at 3840x2160. The AMD Radeon RX 9070 XT is the centerpiece, and its 16GB of VRAM matters here because texture quality and particle density are the settings that hit hardest at native 4K. With that much memory available, you have room to keep textures high without running into the pop-in and stutter that can plague cards with less VRAM headroom in demanding scenes. The Ryzen 7 9700X is not the most expensive CPU on the market, and that is intentional—DOOM Eternal's Vulkan-based engine culls efficiently and does not place extreme demands on the processor, so an eight-core AM5 chip handles the game comfortably while leaving more of the budget where it matters most: the graphics subsystem. The 32GB of DDR5-6000 memory is more than the game strictly requires, but it ensures the system never becomes a bottleneck in texture-heavy areas and gives you headroom for multitasking or running mods, which DOOM Eternal now officially supports. The WD_BLACK SN850X 2TB NVMe drive delivers fast sequential reads that help the engine stream data without the texture pop-in you might see on a slower drive. The 850W Thermaltake PSU provides ample headroom for the RX 9070 XT's power draw, and the Montech AIR 903 case offers enough internal space and airflow to keep the GPU running cool during long slaying sessions. The overall result is a 4K gaming PC that respects where DOOM Eternal's real performance demands lie without overspending on components that would not meaningfully improve the experience at this resolution.