Hi, I have just upgraded to a triple sceen setup and am getting very poor frame rates. I didnt know of any special fsx tweaks to help this.

 

I have an I7 860 oc to 3.8ghz, 8 gb ddr3 ram at 1600, twin GTX460 Asus 768mb graphic cards running three 22inch monitors at 5040x1050 resolution.

 

I have nvidia inspector set up. My FSX config has the usual, poolsize, rejectthreshold, texturemaxload, texture_bandwidth_mult and Fiber_frame_time_fraction tweaks.

 

Anybody have anymore things that might help.

Hmmm...you almost have the exact system setup as I do. I'm assuming you're using surround video...right? I have mines in SLI mode with surround video. I really do not look a FPS...I look more at how smooth it looks.

 

FPS locked in at I think 20FPS or something like that.

 

What size Power supply?

 

Also there's a service that I shipped my FSX.cfg (online) file to and it pointed out some tweaks and suggestion...but I cannot remember who that was.

 

-Ray

I occasionally run three 24" monitors from a single AMD 6950. My experience for the most part has been okay, but I don't expect to get the same performance at that kind of crazy resolution (using bezel correction, my resolution is approx. 6150x1080). I definitely have to turn down some sliders, my 4x SSAA setting can be a little much, and I do find that the performance hit from dense clouds is far more noticeable.

 

No additional fsx.cfg tweaks beyond the usual, only slider adjustment.

Craig,

There won't be any magical tweeks to give you great performance. Don't have too high expectations at that high pixel count. You either have to turn down sliders/ImageQuality, live with your low FPS, or you need better hardware.

 

We all know that FSX is very CPU demanding. Increasing the number of pixels you render doesn't only just put additional load on your GfxCard but also a lot of extra load on your already hard working CPU as well decreasing framerates considerably in CPU demanding areas.

 

You said you have nVidia Inspector set up. Do you get quite a bit higher FPS if you lower the IQ settings in Inspector? In that case a faster GPU might be enough for you. If you get poor FPS when you have lots of clouds at high IQ settings in particluar it's the GPU that's struggeling.

 

Your video cards only have 768MB memory. Using SLI still only give you the same ammount of memory as a singe card and I suspect that is too little given your very high resolution. The fact that you use SLI also means that you only use a x8 PCIe bus to each card. That will be holding you back when you have loads of autogen in view as well. In the scenarios when you are PCIe limited neither a faster CPU nor a faster GPU will help.

 

A single GTX670 (or better) would give you noticable better performance when it's your GPU holding you back.

 

An overclocked Sandy/Ivy bridge would give you noticably better performance in scenarios when it's your CPU holding you back.

 

No tweaks will ever come close to that unfortunately.

Hi all, well thanks for all the idea's. I think it's time to invest in a new PC or at least a graphics card transplant.

 

Was looking at two GTX660's 2gb but now I am wondering if I might be better with a single 4gb card either Nvidia or AMD

 

The power supply is an 850 watt model so thats not a problems.

 

My Nvidia inspector is set up for 4xS and the sliders are midway. I think it may just me being picky as I looking at the outer screens whilst running the NGX and landing at Innsbruck (Aerosoft version). I get around between 9 and 12 fps.

Low frames in the NGX@major add-on airport sounds a bit more like a CPU limited scenario...

 

When it comes to the Gfx cards I'd pick a single gtx680 2GB over 2xGTX660 any day. I guess the 4GB version could also be a better fit for all you multi monitor guys. Remember that the gtx660 (and the ti version) only has 1.5GB memory at full bandwidth with the remaining 0.5MB having 1/3rd of the bandwidth. And 2x2GB cards in SLI doesn't add up to 4GB for the game. It's still only 2GB for the game.

I have been doing some research on upgrading my PC and have decided on an i5 2500k or i5 3570k, either as they are at the same price and can overclock to about 4.5Mhz, but I am a bit confussed as to which graphics card to go for. The choice is;

 

GTX 670 2gb, GTX 680 2gb / 4gb (don't know if the extra gb will make any difference on surround), HD7950 3gb overclocked or the HD 7970 3gb.

 

 

Does anybody have any experience with these cards that can give me some advice.

maybe you should move to dual PC over LAN ....