Have just downloaded the latest 1.05 to 1.08 ArmA patch, that along with the 1.05 patch weigh in at 1gig zipped!!! I don't think I've ever seen a game have such large patches before, don't know what 1.08 adds to the game yet? but glad to say ArmA is running pretty smoothly now and is stable with patch 1.05 now I've finished this comp upgrade.
Looks like I'll be testing the game into the wee small hours tonight.