Hi All - well, I finally decided to splurge and buy a new rig for FSX. With my old HP I was getting between 25-30fps with frames set to unlimited and fsx was smooth as butter. I still saw lower frames in the PMDG JS41 (18-21FPS) and wanted to ensure I would have a system that would be able to handle the new PMDG 737 as well as add some payware sceneries. Since I've had my system its been a nightmare. Although my fps are through the roof flying my A2A B-17 (50FPS with settings high), the stutters are brutal! I've done lots of reading on the Avsim forum, changed my fsx.cfg file as per some of the recommendations, used FPS limiter at 30FPS as recommended, but can't seem to get rid of the stutters! I went as far today as to buy another HD5770 and crossfired it but still have not seen the stutters disapear. I'm pulling my hair out at this point - very frustrated. Can anyone recommend a fix? With my rig specs I should not be seeing this... Thanks in advance for the help. Specs below: * case atx antec nine hundred two * intel core i7 950 3.06ghz/8m/s1366 * sapphire pcie rad dh5770 1024m hdmi box (crossfired) * sata2 1.0tb seagate 7200.12 32m st31000528as * s1366 asus rampage II extreme x58 rog * ms-win 7 home prem x64 dvd oem en 1pk * dvd+/-rw lg gh22ns50 sata dl 22x oem blk * 750w atx corsair tx * kingston hyperx 1600 mhz ddr3 6gb kit intelMike

Have you tried boyote's CFG with fps limited at 30 with external app?

Try the SM3 Mod, and try taking down the XFire config (though FSX is multi-video card awhere it's not optimised for it in the least, it takes some extra tweaks to XFire working in FSX.)And I DO NOT want the NV fan club pulling out the "Don't buy ATI" card!

Hi Squishy - yup, tried his cfg but it made my font all fuzzy and didn't eliminate my problem Also used FPS Limiter as per his recommendation and although it does reduce the problem, it doesn't eliminate it. With my old rig it used to be very smooth, with this much better rig is stutters. Also update Directx as well as drivers... Seems my problems spyked when I installed Reality XP's WS530 - not sure if that is related. I'm at the point of thinking of doing a complete reformat of my hard drives and set it up myself. Then again, would hate to go through all of that and end up with the same problem.

OK, first of all. Whenever you buy a new system like that you absolutely positively needs to install windows again from scratch. You cannot use an old installation, it will cause very serious issues. Also, dont use somebody elses config. Every system is unique and requires manual tweaking. Dont try many tweaks in one go, only change one variable before you test it out in the sim. A "quick" thing you could try would be to defrag your FSX drive. I also recommend overclocking that chip of yours, it should easily reach at least 3.8ghz. You would need proper cooling tho

maybe Vsync is off?

Hi Wims - it was a new installation, I've installed and installed fsx so many times in the last week that I am wondering if the reg is all screwed up... I ran some tests on the crossfire set up and thunderbolt is correct - it does not enhance performace. i looked at the gpu load and it is non exististent. Taking it out and will return it :) I did do a degrag between setups also so I know that is not the issue.I don't understand how my old system which is far inferior to this one ran FSX much better.....Will take your advice and tweak in bits instead of batches. I don't have any experience in overclocking but will look into it - do you have any websites you can recommend for me to do some research?Thanks again to all for the recommendations.MikeWhat is Vsync?

Hi Squishy - yup, tried his cfg but it made my font all fuzzy and didn't eliminate my problem

1). Fonts go fuzzy when your Mipmap Detail Level is not set to >= "Quality" in CCC. 2). In most cases Crossfire does nothing for FSX, (and a single 5870 will blow away a pair of 5770's.)3). You need to get the proc up to a minimum of 4.0 gig IF you want stutter-free. (It will do 4.2 at 21 x 200 with some added air cooling). Even with 4.2 gig and a lot of experience many/most of us will have something pulled back in order to get that. It's not always the PC, either - e.g. OrbX has just released a beta patch for PNW which has almost cured stuttering around Seattle. 4). As Wims and others have pointed out - if you want a trouble-free relationship with your pc - you MUST install Windows again - from scratch - and - on it's own drive.5). Don't expect it to all happen at once, Mike! Both Nick Needham (in this post, plus its' pointer's to other posts:-http://www.simforums.com/forums/fsx-stutter-judder-problems_topic37298.html ) and then ******* Altuve's brilliant posts here at Avsim have a plethora of documentation on taming FSX. Playing with those recommendations for a couple of weeks will yield a quite acceptable, smooth, error-free performance with lots of traffic and detailed scenery. You just have to start at the right spot and bite the bullet with Nick's posts first. Go through the whole thing - then start applying *******'s fixes. Good things are seldom cheap, and cheap things are seldom good.edit:-add this to your fsx.cfg, under the [GRAPHICS] section:-ForceFullScreenVSync=1 ForceWindowedVSync=1another edit:-Read this thread from beginning to end:http://forums.pureoverclock.com/showthread.php?threadid=5736Regards,

I'm not sure about the need to reinstall the OS. I changed MOBO + CPU and kept my drives with no issues

I'm not sure about the need to reinstall the OS. I changed MOBO + CPU and kept my drives with no issues

Maybe so, Dario - I've done the same, several times, but I plus most of the successful guys here, all of the IT professionals here - and I would speculate - all of the FSX developer members here - are quite sure. You are just happen to be one of the lucky ones!Here's another of Nick's posts:-http://www.simforums.com/forums/topic29041_page1.html

Maybe so, Dario - I've done the same, several times, but I plus most of the successful guys here, all of the IT professionals here - and I would speculate - all of the FSX developer members here - are quite sure. You are just happen to be one of the lucky ones!

I was actually surprised that everything went well. I have no idea why, but maybe W7 handles the drivers and all that stuff better than previous OS?I started running some benchmarks and stress tests (cinebench, maxxmem, furmark, superpi) to make sure the system was stable and performing as expected. then tested fsx and OCed the CPU. No problems at allI guess it doesn't hurt to try some tweaks first, and if everything fails, reinstall the OS, but that's just me, a lazy bum hehe

I was actually surprised that everything went well. I have no idea why, but maybe W7 handles the drivers and all that stuff better than previous OS?I started running some benchmarks and stress tests (cinebench, maxxmem, furmark, superpi) to make sure the system was stable and performing as expected. then tested fsx and OCed the CPU. No problems at allI guess it doesn't hurt to try some tweaks first, and if everything fails, reinstall the OS, but that's just me, a lazy bum hehe

heheh. Yeah - been there. My bad one was with the purchase of the A2A P47 Jug. Accusim wouldn't work. The posts are still over there, and I got heck from Lewis.. I did know better, too, but I still tried it: a format and a fresh install fixed it.Yup Win 7 is great: it has to be the most robust OS that MS has produced. OC'ing can give you lots of bsod's when load testing, but Win7 never became corrupt, and would always repair itself without issue..

Thanks a bunch for all you input folks - based on your recommendations finally have it running pretty smoothly. The winner tweak so far seems to be Paul's Vsync cfg tweak. That seems to have gotten rid of the stutters while taxing which is great. I'll take in all your recommendations and slowly implement - will report back with to let you know how I made out.Thanks again!Mike

As soon as I heard your problem I thought I'd come here and tell you that I had a similar problem (microstutters) and I fixed it by turning off vsync in Flight Sim and then forcing vsync on my graphics card. There was some issue where both on would cause problems.

As soon as I heard your problem I thought I'd come here and tell you that I had a similar problem (microstutters) and I fixed it by turning off vsync in Flight Sim and then forcing vsync on my graphics card. There was some issue where both on would cause problems.

That's interesting, thanks for the tip :--)