Game crashes everytime large part of city is bombed

All,

I havent had any issues at all until this latest patch 3 came out. Even with patch 2 it was perfect. After patch 3 I noticed sligh drop in Frames when over buildings im usually all ways maxed out on frames at 60 but now whenever a building first loads it will drop to 49 and cause a slight freeze. When i drop a bomb on the large part of town as soon as the bomb hits the entire game crashes. Def a issue with this latest patch as I can run Battlefield 3 on Ultra settings without issues and AH by no means requires the type of recources that BF3 does.

updating to latest Nvidia drivers now to see if that does anything

Comp spec:
2TB 7200rpm Drive 1.5TB free
2.8gig Intel I7
Geforce 560GTX 3gb
16gb ddr3 ram
Windows 7 Prem

AH has its own drive and nothing but AH is installed on that drive.