I was doing a flight over Alaska with the clouds below me (probably 8k below) and then realized that the cloud distance was set at 60 miles, so I moved to all the way to the right which then showed a sheet of clouds as far as the eye could see, and my frames dropped to around 10fps. I was running the Q6600 @ 3.6Ghz and the Ultra is not overclocked.So my question is if this drop in frames is a processor or GPU bottleneck?

It's mainly a CPU bottleneck since FSX is CPU dependent. I think 70 miles is as high as you should place this setting with current computer systems (or that's recommended by the developers of ActiveSkyX). I have a similar system as yours and mine is set at 70 miles, and cloud cover density is set at max. The result is extremely realistic (with ActiveSkyX).Best regards,Jim

Also, in most conditions, a realistic high altitude visibility setting should not exceed 60-70-80 miles anyway. If this is done, in conjunction with 60-70-80 mile cloud deck, you'll never see the edge. It look like wall to wall overcast.RhettFS box: E8500 (@ 3.80 ghz), AC Freezer 7 Pro, ASUS P5E3 Premium, BFG 8800GTX 756 (nVidia 169 WHQL), 4gb DDR3 1600 Patriot Cas7 7-7-7-20 (2T), PC Power 750, WD 150gb 10000rpm Raptor, Seagate 500gb, Silverstone TJ09 case, Vista Ultimate 64ASX Client: AMD 3700+ (@ 2.6 ghz), 7800GT