This article explains why this ancient bug still exists and provides a step-by-step guide to fixing it for good.
If you don’t want to edit files, you can trick the in-game settings menu.
-availablevidmem 4096 -percentvidmem 100 -norestrictions -nomemrestrict gta 4 512mb vram fix
Vanilla GTA 4 has a memory leak. The longer you play, the more VRAM it eats. Install (available on major mod databases). It patches memory management and allows 512MB cards to run texture quality on "High" without crashing.
Understanding what these flags do helps if you need to troubleshoot further: This article explains why this ancient bug still
: Right-click GTA IV in your library > Manage > Browse local files .
(GTA 4) is widely regarded as a masterpiece of storytelling and open-world design. However, it is equally infamous for one of the worst PC ports in gaming history. Released in 2008, the game was optimized for hardware that was futuristic at the time—specifically, graphics cards with 1GB or 2GB of VRAM. The longer you play, the more VRAM it eats
Name it commandline.txt (Make sure it’s not commandline.txt.txt ).
To understand the problem, you need to look back at 2008. When GTA IV launched on PC, graphics cards with 1GB of VRAM were high-end luxury items. Most mainstream cards had 256MB or 512MB. Rockstar’s engine was hard-coded with a safety check: it reads the available VRAM and, due to a bug in how DirectX 9 reports memory to older executables, it often truncates the number. If your card has more than 2GB, the game frequently misreads it as 512MB (or even 59MB in extreme cases).
Vulkan drivers for very old Nvidia cards are poor. Stick to the Commandline method for Nvidia.