My FPS are fine in regular missions and the early stages of the Hammer campaign. They would be in the realm of 35-40 FPS up to 70's in some instances. (All Settings Medium)
But once I started about stage 5 in the campaign, the FPS started dropping. The worst came in stage 6 where my FPS is around 17 and down to 8 once airborne making it unplayable.
This is with all settings Medium, shadows off, cockpit 512, water low, no civ traffic and all bells and whistles off.
My system:
AMD Phenom II X4 955 at 3.62GHz
8.00 GB RAM
Win 7 64 Ultimate
GeForce GTX 460 1GB V-RAM
Plays fine maxed out in training missions, other regular missions, and the first couple stages of the campaign.
Any advice would be greatly appreciated.
Psy