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Hi all, I am using flight sim software since... at least Sublogic Flight Simulator 1 on Apple II... During the last few years I was more involved in military flight sims (IL2, DCS A-10 mostly) but I now feel the need to restart some activity in civilian sims... I had used FS 2004 for quite some time, using IVAO/VATSIM. I bought FSX when it came out but the quality of the program when it was first published was probably a reason for me to switch to other sims... Being a bit tired of flying the A-10 over Georgia (DCS A-10), I wanted a few weeks ago to start again flying liners and the most possible realistic environment. So I did gather the several FSX compatible programs I already have and bought several others. I installed all this and started flying (737 NGX) but was a bit unsatisfied by graphic performance and visual aspect... That was when I found the DX10 forum in AVSIM B) So I did a fresh, complete reinstall this weekend, using DX10 set-up, and the result is quite ok most of the time (steady 30 FPS, buit I notice big slow-downs around large airports (without scenery add-on). Let me describe in detail my configuration : PC : i3770K mildly OC'ed to 4.0 GhZ, 16 Gb RAM, Z77 Asus Formula V mb, ASUS Matrix Platinum HD7970 3 Gb, Windows 8/64 running on system SSD, another SSD dedicated to FSX and add-ons, Thrustmaster Hotas Warthog, display DELL U2713HM 2560x1440. FSX : installed on a dedicated SSD FSX Deluxe/SP1/SP2 using DX10 preview, DX10 Shader Patch 3.2.2, most tweaks applied from the "How To..." doc here fsx.cfg initially modified as per bojote website, then tweaked a bit more (I can post my fsx.cfg content if you need it) Using RadeonPro for advanced graphic settings, mostly AA and DFC limiter to 30 FPS. FSX add-ons : Ultimate Terrain X - Europe, GEX - Europe REX Essential + Overdrive, not using weather engine. Set-up to use 1024 textures. ActiveSky 2012, not using graphics. RadarContact, Ultimate Traffic 2 PMDG 737 NGX A few airports add-ons So, when I fly with stock FSX aircraft on a "standard" airport and scenery (including AS/REX weather and UT2 traffic), I almost always get solid 30 FPS with no artifacts or stuttering on my 2560x1440 display (I am using windowed mode to be able to switch to some add-ons, with the tweak to use borderless window frame). But I noticed several cases where my FPS drops to 13-15, which is IMHO a bit rude with such a config (I can probably overclock a bit more, but that's not the point). - Flying around some complex areas : If I try LFPG (Paris Roissy - Charles de Gaulle ; I live near Paris), using stock airport (no add-on, except what brings UTX/GEX) and UT2 traffic (75% liners setting, 25% GA), when I am on ground or in close visual flight, my FPS drops to 13 :angry: - PMDG 737 NGX : VC drops framerate around 20-25 sometimes, but seems to vary, I need to further investigate this (just a few quick trials yesterday). BUT If I use the head-up display, frames drops a further 10, which is at the lower limit of playability - if I use 737 VC + HUD in LFPG, my FPS should be around 10-13. Do you think that with my PC config and software, getting such FPS is more or less normal ? or should I start tweaking fsx.cfg/RadeonPro settings a bit more with your help ? As said, I can post my fsx.cfg and RadeonPro settings here. Thanks for reading and for your help ! Chris