I know, it is a bit rediculous for that value to have been there lol... I am not exactly sure my machine had the 'ooomph!' to pull it off:
i7-930 not overclocked
6GB Corsair XMS3
2x HD5870 (bear in mind Crossfire is not exactly fully fixed even in CCC12.1)
Intel X-25 SSD
So what I will do later is uninstall completely, remove myself from the Steam Beta Patch and then see what happens after reinstalling the game. Hopefully I can build up the mods one by one to see if the buffer really was the problem, or if a mod was causing it. I now Skyrim 1.4 causes CTD's, I was getting it last night after a fresh install and the more sensible buffer already in place.