I wanted to report the results of some tests that I was fortunate to be able to run on a new PC with a 980X 6 core CPU running at 4.0 Ghz (CL7 memory timing) with an Nvidia 470 connected to a Matrox triple Head 2 Go. Three monitors were connected to the TH2Go for three separate windowed, independent views with a large field of view (210 deg) - the center large screen at Zoom=.33 which provides +-45 degrees and the two side views centered at directly sideways with +-30 degrees (Zoom = .7). Two additional monitors were running a helicopter instrument panel and a GPS display. I realize that using three independent PCs could provide even more performance but the goal here was just to see the performance with a single PC system. The Scenery settings were pretty modest but still fine for a good scene particularly when using the FlyTampa Hong Kong scenery. It was found that Vsync could be left off (providing higher frame rates) when using the TH2Go since it provides the final sync and removes the picture tearing. This system would be usable for a home cockpit that wants to keep it simple. Smoothness was also very important (particularly for hovering and high rate tail rotor turns)and internal/external limiters were shown to provide some improved fluidity. Framerates listed below were without any limiting. The monitors were also driven straight without a Th2Go using a second video card but UsePools=0 caused some artifacts and RejectThreshold had to be utilized - frame rates were somewhat lower.(3 x 1400x900 views) (Aniso=8x,AA=8xQ) Dense Scenery - Normal Autogen - test with yaw rate NOTE: Scenery Settings Med, 38,38,1,Mid 1.x, no traffic Field of View (90,60,60 - .33,.7,.7) Weather=Building Storms, TOD=day/dusk Increased Load - Light Traffic, Very Dense Scenery, More res, Water Low 2.x, Dusk ----------------------Baseline --- Inc Load-----------------------day/duskScenery Location Megascenery Seattle Downtown------ 60/45 --- 40 KSEA 34R------60/50 --- 41 KBFI 31L------- 54/44 --- 41 KRNT 33-------- 52/44 --- 47 KSEA ramp------ 53/40 --- 40FlyTampa HongKong Airport Gates 54/37---32 helipad 1------ 70/50 --- 41 helipad 2------ 71/51 --- 40Megascenery Socal KLAX 25L-------62/46 --- 40 KLAX 25R------- 64/55 --- 39 KLAX at tower-- 68/60 --- 46 KSAN 27-------- 87/85 --- 50 KPSP G1-------- 100/80 --- 55 KCRQ 6----------90/70 --- 50Aerosoft Nice, France-- 55/53 --- 40Aerosoft Monte Carlo--- 62/55 --- 41Megascenery Oahu Downtown------- 80/65 --- 55 mtns----------- 85/80 --- 54Megascenery NewYorkKLGA------------50/40--- 35Downtown------- 50/40--- 31 Tweaks Applied: UsePools=0, Matrox TH2Go ( Vsync=0), FFTF=0.05, display.cfg, from Bojote/Needham list.

We have the same setup, single FSX PC, triple head to go and two more monitors for instruments, two video cards, etc. As you seem more technical than I, I am very interested in your tweaks. I am running with forced vsysnc via Inspector so I will turn that off. vsync=0 Is this in the fsx.cfg file? With Inspector set to force off, does the fsx.cfg matter fro vsysnc?What is FFTF? You note display.cfg. I have no experience with display.cfg so I would like to know more.Thanks in advance for your help.

Take a look at this forum thread for the FFTF (FIBER_FRAME_TIME_FRACTION) http://forum.avsim.net/topic/283565-fftf0-tweak-against-fps-drop/page__st__175If you have a Th2Go, I don't think you will need Vsync forced on - you would see it as midframe visual tearing. With it off, you usually get a true feel for the unlimited frametime rate, but for smoothness you might find that either the standard internal framerate limiter will help or maybe try the external limiters which are a little cumbersome but are helpful for some. I use this because I want to run not in FullScreen mode but in windowed mode.the display.cfg issue is to edit the display.cfg file in the FSX root directory so that there is a specific entry for your particular graphics card.Look at this thread for help - have to register at fullterrain.com (FTX/ORBX) thoughhttp://orbxsystems.com/forums/index.php?topic=11188.0Good luck - let me know how your rates look as you adjust your settings (Water effects at High1.x is for best performance but worse looking water)Dave

Thanks. I turned off vsysnc via Inspector and was awarded with a huge increase in frame rate running at about 46. I think the internal limited is at unlimited, have to check. The sim is very smooth. I will try the FFTF ad use the internal limiter to around 30. However, I am very happy with the sim as it is today.

Thanks for this info...very helpful. I am getting ready to get a 2nd Video card for Gauges and was wondering if an ATI 5770 and a NVidia GTX 470 would play together nicely on the same computer? Seems like I have heard in the past that this is not a good idea. Thanks for any help on this.

Randy, Good question but I have no knowledge about that. Why don't you start a new thread so the title will be focused on your question.

Thanks for this info...very helpful. I am getting ready to get a 2nd Video card for Gauges and was wondering if an ATI 5770 and a NVidia GTX 470 would play together nicely on the same computer? Seems like I have heard in the past that this is not a good idea. Thanks for any help on this.

I have run 3 monitors (displaying integrated Views LFwd,Fwd,RFwd) for a number of years with 2 GPUs of same family- ie GeForce FX5200 AGP & PCI. This apparently allowed both cards to use the same driver. However, awhile back, somebody here in the forums allowed as how they used both an ATI and an NVidia card to do the same job. I assume that required two different drivers.From a practical view point at least, I think things would be much simpler using 2 cards that can utilize one driver.That is- same manufacturer, same family of cards- if not entirely identical.AR