Horizon Forbidden West Update 1037 1580exe Exclusive -

Not all news is good. The 1580exe exclusive has introduced a few new quirks that you should be aware of before patching:

The official stance from Nixxes (shared via a Discord Q&A) is: "Build 1580 is a proof-of-concept for a larger refactor. If stability is your priority, stay here. If modding is your priority, revert to 1037 via the Steam 'previous_release' branch." horizon forbidden west update 1037 1580exe exclusive

The number "1580" is not random. It refers to an internal commit number from Nixxes’ optimization branch. The "exe exclusive" title comes from the fact that this process only spawns on Nvidia RTX 40-series and AMD Radeon RX 7000-series GPUs. If you are on older architecture (GTX 10-series or RX 5000), you will never see 1580exe running. Not all news is good

The numeric identifier “1.580.0” often correlates with underlying middleware updates, specifically concerning memory allocators. Horizon Forbidden West features a dense, streaming open world where assets (rocks, foliage, machines) are constantly loaded and unloaded. Prior to 1.037, players reported memory leaks that caused performance degradation after extended play sessions, particularly on high-end GPUs with 8GB or 10GB of VRAM. The official stance from Nixxes (shared via a

Update 1.037’s executable appears to contain an exclusive memory management protocol. Analysis of performance logs post-update shows a more aggressive and deterministic garbage collection cycle. The .exe now forces the GPU to flush unused texture data more frequently, reducing the "memory creep" that led to single-digit frame rates in settlements like Chainscrape. This fix is exclusive to this executable version; it cannot be replicated via simple configuration file edits. The 1.580.0.exe acts as a digital filter, forcing the game’s streaming system to respect a stricter budget, thereby stabilizing 1% and 0.1% low frame rates.