[SEE]

A lot of people who had severe LE crashes enabled SSAO and Shadows which seems to work for some (but not every one). MP was a disaster regards CTD for me with this patch - you can see my specs and I get good performance with a 2.7Ghz Dual Core. My 17in monitors native resolution is a mere 1024 x 768 which helps and I don't bother setting any AA.

If you have a decent GFX card, I would take note of BS's comment that, lowering Textures, is not going to give an improved FPS with this alpha. Most of my settings are High and Medium except with trees 'off'. SP I disable clouds as they cause stutters and freezes.

I sympathise with you guys having problems on better rigs - it was driving me nuts too! This alpha seems to generate a lot of shader files, I would delete them if enabling SSAO, exit CloD and let ClOD rebuild the shaders on a fresh start.