I was at crz altitude and all of a sudden with 10 to 15 fps with clear weather my sim froze and would start hiccuping every 30 seconds or so, what can be the cause??? I'm not sure if its related to pmdg but i just bought it and just started experiencing this...

Joe,I would suspect some scenery you just went above causing this as it was a smooth ride up to that point. Maybe a graphics driver problem. Or it could be a memory issue. Or a HDD issue. Hard to tell with so little facts. Hope it helps,

So what facts do you need to know?

Anything that you can think of as related to the hick-ups you see. What's your hardware setup? What drivers are you using? What tweals have you done to your FS? To your system? Have you tried the exact same route in another plane? In what planes did you test it? Do you have any add-on sceneries that could influence your performance? What was the flight plan route? Did you see any unusual activity or processes in your Task Manager? What anti-virus are you using. Is it turned on while flying? When did you last do a check for spy-ware? There are sooo many things that can cause FS to stutter, so half of them would sure be enough... :-)That's the kind of facts we're looking for. :+

Latest ati cat driver direct 9.0c fs9 patch, anti virus disabled no more spy ware, i have p4 3.0 800fsb 1gig ram big hard drive ati 9800 pro 128mb agp 8x // AA was on 8 and AF 16x controlled by video card.It happened inside the virtual cockpit while walking around 2 things i noticed one is when I go in vc cockpit or cabin it takes a good second until the textures load until then i see white only in the pmdg aircraft 2nd thing i noticed alot of other planes and scenery t having jagged edges all over them never saw that before installation of pmdg. Again may or may not be this aircraft and i do love it the 737!

Hi, Just a suggestion: Have you checked your hard drive for errors, or defragmented it recently?BoazEKCH

HiYes I do one every week or so and hard drive is in good condition.