Marathon is an extraction shooter. It means that fluidity is not just visual comfort—it's your survival. A drop to 40 FPS at the wrong time in a hot zone, and your loot goes with another Runner. Therefore, the choice of GPU must match your screen and your priorities.
Are you playing in 1080p or 1440p with a reasonable budget? The RTX 5060 Ti is your ally. DLSS 4 completely transforms the experience in Marathon, and at this price, you won't find better. Ray tracing remains accessible in 1080p, and in 1440p with upscaling, it's butter.
Do you want solid 1440p and touch the 4K? The RX 9070 XT is the sweet spot. Its 16GB of VRAM give it a comfortable margin for Ultra textures that Marathon loads in bulk, and FSR does the job for 4K. It is also the most sustainable choice in terms of memory.
Do you want the best, period? RTX 5080, without hesitation. 4K path tracing, DLSS 4, sick FPS - it's the ultimate experience for Marathon. An investment, for sure, but one that will keep you satisfied for years.