Go to options>video>advanced> enable mutlicore rendering> turn model to medium, texture detail to medium> shader to low>shadow to medium> click okay> click apply.

Go to main Tf2 menu> bottom right > advanced options > under performance > uncheck enable html mods.

Go to main Steam page > steam top left > IN game> uncheck enable Steam overlay.

Through turning off game overlay & html mods, enabling multicore rendering, and turning down model & texture & shaders & shadow, you can relieve this issue greatly. You can try the following methods: Fix 1.

Therefore, to solve the problem, you must reduce the RAM that TF2 is using. Even though you're running 64-bit systems, 32-bit processes are still limited to around 2 to 3 GB of RAM. TF2 seems to have an internal limit at around 2 GB of RAM (just like Skyrim, which has the limit of 3.1GB RAM usage), and will balk if it goes above that. Steam and most Valve games are all 32-bit apps and they will have use limit of RAM. The issue 'TF2 out of memory or address space' is related to memory, but it is not caused by the shortage of RAM. Then, what causes issue 'TF2 out of memory or address space' and how to solve this problem? Just keep reading. However, many people wonder why this problem will happen, because the RAM of their PCs is no less than 8GB, while the TF2 recommended RAM is 1GB. I downloaded the cheat terminal mod on the Xbox with doors and most terminals (excluding the cheat terminal) to try and fix this I started a new game. Hello, I've been playing tf2 for a very long time and I've never had a problem with the game, except now. Here's a list of all the best console commands, cheats and item codes in Fallout: New Vegas. TF2 is an excellent game but it also has some problems, for example, some people complain about 'TF2 out of memory or address space' issue in forums. Since the release, TF2 has received many praises and awards for its art direction, gameplay, humor, and use of character in a multiplayer-only game. The Gamebyro engine (which runs fallout 3 and NV) has issues with 2 or more cores. You should do this for Fallout 3 and New Vegas if you have a quadcore processor (or any processor with more than 2 cores). But later on April 9, 2008, it was released as a standalone version on Windows. This is the multicore fix and is one of the most important things. The game was first released for Windows and Xbox 360 platforms on Octoin an orange box three-in-one manner.

Team Fortress 2 is a multiplayer first-person shooter game developed and published by Valve.

Fallout new vegas multicore fix