Every 1

My first question would be whether these frame rate fluctuations are discernible without the frame rate counter. Do you actually notice stutters/chugging?I ask this because I've found that certain combinations of settings sometimes creates a situation where the frame rate appears to fluctuate using the FSX counter, but there is no detectable frame stutters in the sim itself. Also, I can run FRAPS in these situations and not have the FPS jump up and down.However, there are other situations where the frame rate most definitely stutters. This is particularly noticeable in turns when using unlimited FPS. It fluctuates wildly between 60+ and 20-, and I had to utilize the external frame rate limiter to keep my FPS unlimited in FSX but locked for consistent, smooth performance.In many cases, I've found its best just to ignore the frame counter because actual sim performance is just fine.

Detectable, yes. I have a frame rate limiter, I

Your experience sounds fairly typical of most FSX users; there is significant variation in frame rates unless it is locked to your average level. The only way to run unlocked without stutters is to use the fps limiter that has been discussed on many forums previously. I have not found this to work well on my system, so I just run locked at 30 fps.Cheers,Noel.

Bumps me from 30ish to 8 at same intervals :( At risk of converting all together to the sleep inducing x-plane :( , I

Be very careful with the tweaks. You can get all kinds of advice, much from very knowledgeable persons, but your system is your system.Start over with no tweaks in your configuration file. Slowly add one at a time and be sure to fly in a number of different areas to see the results. Texture_multi (Something like that) keep at 40. Texture bandwidth--try 4096. Check out NickN's tweaks but again use cautiously and slowly.Be sure you have the latest NHancer for your current drivers. When I got rid of a bunch of tweaks and found what worked on my system the flying smoothed out and the frame rates are much more stable.My two cents.Randall

Yep, the FPS limiter works pretty well for me, and keeps the stutters to a minimum (older system)Nickn tweak guide:http://www.simforums.com/forums/forum_posts.asp?TID=29041

Do I have a rotten PSU? It

Thanks a lot, guys, appreciate it! I

Yes, fsx will generate a new cfg.If i were you I'd try it beforehand without Nhancer, I also have those oscillations with a similar card XFX GTX285 but have found these latest drivers from nvidia to work better on FSX without nhancer.AA also seems better on fsx with these latest drivers (191.07) not perfect but quite acceptable. I have my fps locked at 40, sweet spot for me.Hope it helps :)Off topic, can you tell me which cooler you're using on the gfx card, and are you happy with it ?evga x58 classifiedintel xeon i7 W3540 oc'd @ 4.4xgx gtx 285 x 1920x1200 native3x2gbddr3 ram @ 1900 mhz1000 w psuFSX acc + gex enhanced very high settings + rex2+asaWin7 x64

Got the 195.something driver, and that did wonders on the benchmark, and on frame rates as well, except for the dips not going away. Turn off nHancer?! But why not! Hardly anything can surprize me when it comes to fiddling w. FSX :( I

K, repeat a hundred times: Never trust a driver!I

As I feared. It

I too had this, but it didn't appear always, and if it did appear, it'd be gone after 5-10 minutes. Did you try and see how long it stays with you? For me it worked to simply stay still and look around the plane until the stutters went away. They always did. I think it was because of high autogen levels (it usually happened at airports with huge forests around it) and the system not being able to consistently draw everything at the right time, at the right place.

Sorry, i thought I had the latest drivers, going to try these latest ones now.Regarding the cooler, I've already tried that one, but had to take it back because it won't fit on my card, chip placement on XFX cards is different from other ones and don't fit the aluminum frame holes of that cooler.Rgds :)