TexXxan91

Ok thanks, I'll revert back to stock clocks. An update on what I've done so far:I uninstalled both my PMDG 747 and J41 and removed all pmdg related .dll entries from the dll.xml and rebuilt my cfg again. I don't get the error on start up anymore but I'm still getting terrible fps in flight which I have found that it only occurs when the sound is OFF or the sim is paused. When I turn the sound back on, the fps plummet again. I have never seen this happen before so any ideas on how to get this fixed? Thanks,Trey

Ok, I turned down the core freq on my card to 675mhz (which is lower than what I had it before I got these black screens) and its running perfectly stable. I went to start up FSX and I got that fs had stopped working error. I start it up again and this time I get this error with pmdgsounds.dll that looks like this:"Flight simulator has detected a problem with a third-party software program: Name : PMDGSounds Dynamic Link LibraryVersion : 10,0,61355,58Compagny : PMDGFile : PMDG\DLL\DLLs\PMDGSounds.dll Do you want to run this software ( not recommended )?"I hit yes the first time and FSX just crashes, I start it up again and hit no and FSX starts up but when I started just the default flight I was getting HORRENDOUS frame rates. I'm talkin like 5 fps. LOL I closed FSX immediately and that is all I've done so far. The only changes that have been made to my computer before I started fsx today was that windows update installed the W7 SP1. I made zero changes to fsx itself. This is getting really weird...

Ok, I have been getting a lot of black screens lately and I cannot for the life of me figure out what exactly is causing them. Almost every time I access one of the menus in a flight and exit out of them, I get the blackscreen... At first, it seemed that I was only getting them with the PMDG 747 and Aerosoft Airbus X, but just recently, I got one with my CS 757. Like I said, they only happen when exiting from one of the menus during a flight. I've tried so many things but now I'm seriously out of ideas on how to fix this... I think they only happen with more complex aircraft at complex sceneries/airports and I am able to exit menus sometimes but very rarely.I've tried many cfg tweaks, rebuilding my cfg, copying the vista uiautomationcore.dll in the main directory, clearing my shader cache..none have worked. Attached is my fsx.cfg as it is right now.These are some addons that are being used when I get the blackscreen:REX 2 External FPS Limiter set @ 30 FPSENB modFSWCPMDG 747-400X, Airbus X, CS 757Orbx FTX AUS 4.0 and YMML v2 Aerosoft Mega Airport Heathrow and Frankfurt X Specs:FSX w/ AccelW7 x64WD 500GB dedicatedQ8300 @ 3.2 GHz4GB @1066 Mhz GTX 470 @ 700MHz (Driver ver: 266.58)I have Nvidia Inspector controlling my AA and AF. AA=8xS, AA transparency=2x supersampling, AF=16x Any suggestions regarding this will be greatly appreciated. Thanks,Trey