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Screen flicker prob in SLI mode - FS9 & FSX (Read 522 times)

Jan 10^th, 2009 at 1:16pm

bbstackerF Offline
Colonel
USN 1978 - 1993 Aviation
Ordnanceman
Avondale AZ

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Posts: 531

I have a couple of 8600 cards in my desk top - P5N-E Asus MoBo. Vista Home Pre 32-bit with an X-52 control set up and a Cyborg Keyboard, . When I run with a single card I can use all res modes in both FS9 and FSX. But as soon as I switch to SLI mode and run both cards I can't get either sim to run in anything higher than 1024x786 without have wild screen flicker continuously. Intrestingly, if I use the hat switch to look down on the a/c from a high angle the flicker stops. The minute I angle down anywhere close to being on an even view or have the view show surrounding scenery the flicker starts again. Is there a setting I'm missing here?

Gateway FX i7 CPU 920&&ATI Radeon HD 4850 GPU&&Saitek ProFlight Yoke / Saitek Cyborg Keyboard&&ProFlight Throttle Quadrant / ProFlight Control Panel&&3 GB GDDR3 RAM&&688 GB HD + 1.5 TB Seagate Baracuda Internal HD&&Windows Vista Home Premium 64Bit&&

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Reply #1 - Jan 10^th, 2009 at 1:24pm

NickN Offline
Colonel
FSX runs fine... the problem
is you or your system

Posts: 6317

Neither FS9 or FSX use SLi for performance increase.. you are wasting your resources on 2 cards

The onlt benefit FS9 or FSX will have with SLi is IF the monitor resolution is higher than 2000x AND you run 16-32AA. In that case you are able to run that resolution and AA without a massive perf loss but below those resolutions and AA settings, not one frame more and SLi is actually hitting the system harder

there is absolutely not, nadda, nothing in performace gained with Sli in MSFS

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Reply #2 - Jan 10^th, 2009 at 1:28pm

bbstackerF Offline
Colonel
USN 1978 - 1993 Aviation
Ordnanceman
Avondale AZ

Gender:
Posts: 531

Got it. So basically I should just keep my system on single card mode. Thanx for the info I should have asked a long time ago.

Keni

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Reply #3 - Jan 10^th, 2009 at 1:47pm

NickN Offline
Colonel
FSX runs fine... the problem
is you or your system

Posts: 6317

Yep

single card in FSX unless you are running a massive resolution and want the high AA support

and even then, you would be hard pressed to notice the difference between 1920x1200 8xS (single card) and 25xxx 16AA Sli

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Reply #4 - Jan 10^th, 2009 at 4:06pm

Mazza Offline
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Melbourne, Australia.

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Posts: 3184

But is most games that use the GPU allot, SLi can be helpful Wink

Sunset Chasing...RULES

AMD 9550 2.43 X4 - 2Gb RAM 800Mhz DDRII - Asus 4670
Corsair TX-750W

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Reply #5 - Mar 15^th, 2009 at 9:08pm

Sacha Offline
2nd Lieutenant
Fly FS
Toronto

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Hmm - I get horizontal flickers too. But it was never associated with SLI before. I got this problem after installing a new primary monitor (and taking my old primary to a second monitor), after which I played with certain settings and it occurred (fs9 and fsx).

Monitor drivers are up to date, and most settings are set to application controlled.

Switching to window mode then back to full screen seems to help.

GeForce 8600 GT XXX in SLI.

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