Quick Answer
Yes, effortlessly. Even at native 4K maxed the RTX 5090 runs GTA 5 well past 130 fps, because the 2013 engine is light. This flagship is heavy overkill for GTA 5 at 4K; the resolution barely slows it down.
4K is still easy for an aging engine
GTA 5's engine is old enough that even native 4K maxed cannot trouble the RTX 5090, which holds well over 130 fps. Los Santos looks sharp and clean at 2160p with maxed draw distance and detail, and the card stays cool throughout. There is no demanding ray tracing in the base game. A 4K 144Hz panel makes the city crisp, and the 5090 feeds it above the refresh in most scenes. For GTA 5 alone, this is far more GPU than required even at 4K.
SA 4K setup advice
Evetech stocks 4K 144Hz gaming monitors from roughly R10,000, an easy match for the R55,000-plus 5090. Use a HDMI 2.1 cable for full 4K refresh, max the settings, and enable V-Sync to remove tearing. A 650W to 750W 80+ Gold PSU covers the system. The 5090's real value comes from demanding modern AAA games at 4K; GTA 5 simply runs flawlessly as a bonus, looking sharp and smooth at the highest resolution.
How the 5090 compares for GTA 5
Even at 4K, GTA 5's old engine keeps the RTX 5090 and a mid-range card both comfortably above 100 fps; the tier difference barely shows. The flagship's real advantage is in demanding modern 4K titles. For GTA 5 at 4K, a more affordable card also handles the game well, so the 5090 is justified by your wider, heavier library rather than this 2013 game.
FAQ
What FPS does GTA 5 hit at 4K on the RTX 5090?
Well over 130 fps at native 4K maxed, because the 2013 engine is light. The resolution barely slows this flagship down.
Is the RTX 5090 overkill for GTA 5 at 4K?
Yes, substantially. Even 4K cannot challenge GTA 5's aging engine on this card. The flagship only earns its price across demanding modern games.
Is a 4K monitor worth it for GTA 5?
For visual sharpness, yes, and the 5090 feeds 4K easily. But you do not need a flagship to drive GTA 5 at 4K; lesser cards also manage it well.
Pro Tip
Use a HDMI 2.1 cable and max everything at 4K; the 5090 runs GTA 5 past 130 fps with the aging engine barely loading it.