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After a few more days of troubleshooting, I still can't get to the bottom of the issue. I have run benchmarks/stress tests on my CPU and GPU, checked my hard drive for errors using three different services, updated the BIOS, and can't find a single issue with any of my hardware. Flawless hardware with a fresh install of W7 and FSX, and these problems are still manifesting themselves. Other games that I have installed since my fresh install are absolutely smooth with excellent FPS, but FSX is still stuttering like crazy, even with the sliders on minimum. There has got to be something conflicting with FSX, but when the problem was occurring with only a W7 install and FSX, I can't imagine what it could be.

Nope, no network involved.

Nope, didn't change anything at all. I know next to nothing about overclocking and have always been wary of it, so I've never experimented with it.

Thanks for the suggestions! Tried the bufferpools suggestion and the affinity mask setting, and haven't seen any improvement. Defragged the drive with Mydefrag as suggested. I don't have a tessellation setting in CCC, so I wasn't able to test that out. There are no unnecessary programs running in the background. This is on a fresh W7 install, so there are no programs on the system except for FSX and Firefox (and CCC, except I had the problems before I installed that). I just can't seem to wrap my head around why these problems are still persisting after all software that could have been conflicting has been wiped from the drive. The only thing I can think of is there must be some sort of hardware issue, but I don't know where to start looking.

Desperately looking for some help here. I am experiencing terrible stutters in FSX, and I can't seem to do anything to get rid of them. About six months ago, this very same computer was running FSX just fine. I averaged about 25-30 fps with the PMDG MD-11 with medium-high settings, and would get near 60-80 FPS with the default aircraft. The FPS were always very smooth. I took a break from FSX for a few months, and now after coming back I am experiencing terrible stuttering. With the PMDG aircraft at KIAH, I will get 25 FPS...then it drops to 5....then 30....then 3...and so on. Stuttering occurs even with the default aircraft. I have tried EVERYTHING I can think of to get rid of the problem, but to no avail. Here is a list of things I've tried: Virtually every combination of settings in the FSX.cfg (Bojote's online tuner, deleting the FSX.cfg and letting FSX regenerate it, etc.)Tried limiting FPS with an external limiterManipulated virtually every setting in ATI Tray ToolsTried FSX with all sliders at zero...get over 100 FPS with default aircraft, but stutters that bring it down to 5 FPS.Uninstalled FSX, reinstalled. Tried different hard drives.Clean W7 install. Installed FSX as the only program on the drive.Opened my computer case. Cleaned it meticulously. Removed RAM from slots, ensured it was clean, reinserted. Like I said, this computer used to run FSX with steady FPS. I have no idea what could be causing these stutters, especially after completing wiping the HD and starting from scratch with a new W7 installation. My specs: AMD PHENOM II X4 9650 3.4 GHZ (not OC'd)WD RAPTOR 150GB 10,000 RPM SATAII (FSX drive)500 GB SATA II 3.0 GB 16MB 7200RPM4 GB DDR2 PC6400 MEMORYTHERMALTAKE MaxOrb GAMING CPU FANASUS M3A78-T AM2 790GX HDMI ATX AMDTHERMALTAKE TOUGH POWER 750 WATTATI RADEON 4870 PCI-E 512 MB DDR5W7 64-BIT Thanks for any suggestions!

Thanks for the advice! Got a great deal on a new Phenom II x4 965 3.4 GHz processor that has increased my FPS significantly!

Looking to upgrade my system. With medium-high settings, I'm getting around 15-20 fps and am looking to be able to get a boost.AMD Phenom 9950 Quad-Core 2.61 GHzATI RADEON 4870 PCI-E 512 MB DDR5WD RAPTOR 150GB 10,000 RPM SATAII500 GB SATA II 3.0 GB 16MB 7200RPM4GB DDR2 PC6400 MEMORYTHERMALTAKE MaxOrb GAMING CPU FANASUS M3A78-T AM2 790GX HDMI ATX AMDTHERMALTAKE TOUGH POWER 750 WATTWhat are the most cost-effective ways to get a significant boost in FPS for my system? I'm running W7 64-bit.Thanks a lot for any advice!

Thanks for the suggestion. That's what I thought too, except their paintkit has the default McDonnell Douglas paint scheme already on it, and I'm not too skilled with Photoshop.

Can anyone point me in the direction of a repaint for the Leonardo SH Maddog that's just all white?

Having a bit of a problem with the Wilco E-Jet in FSX. Ground power is supposed to be available when the parking brake is on, however it is only available for me when the parking brake is OFF. When the brake is off, I can hook up ground power, but then it cuts out after about 20 seconds. Any ideas? I've tried reinstalling, starting with default airplanes first, etc.Thanks for any help.

>Chris->It is +100 -0 for the checkride. I was just informed of that>because I'm prepping for my instrument checkride soon. ;)That's by far the worst part of the instrument checkride. Try holding MDA + 50 ft, because most DPEs really will fail you for going busting the MDA by even the smallest amount.

I think it is must be worth the fuel cost,>especially once they are at cruise altitude, to not fly thru>bad wx and risk the whole aircraft.Plus you're always supposed to remain at least 20 NM (although the farther, the better) from thunderstorm echoes because of the severe turbulence, updrafts, downdrafts, etc.