Marvel Rivals launched in December 2024 and immediately ran into a gear issue that has nothing to do with mice, pads, or skill. Unreal Engine 5 doesn't like high polling rate mice, and if you're running 4000Hz or above, the game may be borderline unplayable regardless of your hardware.
This isn't speculation. It's extensively documented by players with top-tier rigs. A user with a 9800X3D and RTX 5090 — literally the best gaming hardware money can buy in early 2026 — tested systematically: “1K polling rate no issue, 2K polling rate no issue, 4K polling rate not noticeable issue, 8K a lot when moving camera a lot. I have a 9800X3D and RTX 5090 and I still feel it.” Another player with a 4090 and 13900K tracked down the cause after trying everything else: “My mouse has a maximum polling rate of 8000Hz. Changing my mouse's polling rate from 8K to 4K/2K/1K fixes the stuttering.”
The performance impact is severe. One player measured it: “It was causing an extra 40% CPU usage, FPS drops from 200+ down to below 20, and causing my GPU utilization to drop to below 20%.” That's not a subtle performance hit — that's a game-breaking issue caused by your mouse polling rate. A community member explained the underlying problem: “Unreal Engine doesn't like it when the mouse has a polling rate higher than 500Hz. At higher values, acceleration appears and is not removed by any editing of config files.”
The community consensus has settled on capping your polling rate at 1000-2000Hz for Marvel Rivals. One player found 2000Hz to be the sweet spot: “I believe 2K polling rate is optimal. Anything above 2K it stutters frequently. I'm pretty sure the only games I've been able to run 4K+ with no issues are Valorant and CS2.” This means if you bought an 8000Hz mouse because the marketing said higher is better, you're running it at a fraction of its capability in Marvel Rivals — and probably in every other UE5 game too.
On top of the polling rate issue, Marvel Rivals launched with mouse acceleration enabled by default with no in-game toggle. Players had to dig into config files to disable it. One confirmed: “Modifying the config file to turn it off makes the game feel like a normal PC shooter. It goes from feeling like your aim is lagging to precise accurate gameplay.” A January 2025 patch was supposed to fix sensitivity issues but instead introduced new bugs — multiple players reported their sensitivity randomly changing mid-game, with one writing: “It feels like my mouse sensitivity was randomly changing to higher values for a very short period of time.”
Here's the honest take: Marvel Rivals is too new and too technically unstable for meaningful gear recommendations. The input pipeline has fundamental engine-level issues that make mouse hardware discussions almost irrelevant — you're fighting the game engine before your gear even enters the equation. The developers are actively patching these issues, and the experience will likely improve. But right now, the best “gear advice” for Marvel Rivals is: drop your polling rate to 1000Hz, disable mouse acceleration in the config file, and wait for NetEase to finish fixing their input pipeline before you blame your mouse for how the game feels.
The community data here is genuinely thin. There are no long-term gear preference discussions because the game hasn't existed long enough for long-term preferences to form. What exists is troubleshooting threads — players trying to make the game feel normal, not optimizing for competitive advantage. That's not a criticism of the players. It's an honest assessment of where the game is in its lifecycle.