My following system specs are below:One ASUS LN164-SLI WS MotherboardTwo (2) AMD FX-74 Processors each WatercooledTwo XFX 8800 GTX 768MB GPU's in SLI ModeTwo WD Raptor 10K 150GB in RAID 0 for FSX and Vista 64One WD Terrabyte Sata Drive for StorageTwo Eliminator Water Cooling units for each CPUOne Hyundai 24" LCD 1920 x 1200 x 32Four (4) GB of PC6400 Corsair DC RAMTwo Lite-On Optical DrivesOne SB X-Fi Extreme Gamer Audio CardOne Logitech Z-5500 Digital THX Speaker SystemOne Saitek X-52 Pro FCSMS Vista 64FSX w/ Acceleration Nvidia Driver: 169.25Service Pack 1 for Vista InstalledFSX.cfg Modifications used:[JOBSCEDULER]AffinityMask=15TEXTURE_BANDWIDTH_MULT=100UPPER_FRAMERATE_LIMIT=0WideViewAspect=TrueProcSpeed=6401PerfBucket=7FIBER_FRAME_TIME_FRACTION=.55THERMAL_VISUALS=1[DISPLAY.Device.NVIDIA GeForce 8800 GTX.0]Mode=1920x1200x32Anisotropic=1AntiAlias=1TEXTURE_MAX_LOAD=2000D3D10=1DAWN_DUSK_SMOOTHING=1TERRAIN_MAX_AUTOGEN_TREES_PER_CELL=2400TERRAIN_MAX_AUTOGEN_BUILDINGS_PER_CELL=1000[bUFFERPOOLS]PoolSize=10000000[DISPLAY.Device.NVIDIA GeForce 8800 GTX.0]Mode=1920x1200x32TriLinear=1AntiAlias=1[AccelerationPack]ControlsFirstRun=0HomePageFirstRun=0[DISPLAY.Device.NVIDIA GeForce 8800 GTX.0.0]Mode=1920x1200x32AntiAlias=1TriLinear=1Since I like to run at that resolution and like my framerates, I paid a pretty penny for the system. Framerates are between 40-80 depending on terrain (city or mountains). I am a bit confused on the options that have to do with your CPU and the video cache memory (Max_Texture_Load=1024). Since I have to 768MB video cards in SLI, do I put in 1536 ? (768 x 2)? Is there a hidden setting that says "Enable Mutiple Core or Multiple Physical CPU's ?Tim

Good to see a top-end AMD system rocking FSX.You actually might try running with SLI mode off.Regarding the multiple core cpu's, AffinityMask is the way to go, and I see you've already done that.RhettAMD 3700+ (@2585 mhz), eVGA 7800GT 256 (Guru3D 93.71), ASUS A8N-E, PC Power 510 SLI, 2gb Corsair XMS 3-3-3-8 (1T), WD 150 gig 10000rpm Raptor, WD 250gig 7200rpm SATA2, Seagate 120gb 5400 rpm external HD, CoolerMaster Praetorian