Crashing- help?

[raatorotta]

New Vegas keeps crashing after few minutes of game play. First image freezes but game is still going on, as i hear npc's talking. I pressed alt+tab and went back to game, it worked fine again. But in few minutes later it crashes and i end up bakc in windows. I had no problems with old computer parts( graphic card was Geforce 6600) but with this new card problem is there. New card is Geforce GTX 460.

 

My load order is this:

 

FalloutNV.esm

MikotoBeauty.esm

Centered 3rd Person Camera.esp

Hacking 1x Word (Firmly) NV.esp

Cass Gone Rogue & Factionless.esp

NV Companion Outfits Playable.esp

7DanceFnV.esp

t3bbarmor.esp

VanillaClothingMerchant.esp

LFox Magic Fingers Perk.esp

DrugsAreBadMKay.esp

FeelingIrradiated.esp

Compiled Patch.esp

MikotoBeauty.esp

 

I have tried install nvidia fix dll. D3D9.dll. But it doens't help. Any ideas causuing this crash? And is there any fix avaivable for this?