ATI Crossfire

[Dontcopy]

Hi,
I'm thinking about trying ATI Crossfire in FSX, but i'm not sure if it will make any difference to my fps.
I'm currently running the ATI HD 5670 on one screen. Is anyone running Crossfire or know if it will work with FSX?
Thanks

[IslandBoy77]

QUOTE (Dontcopy @ Oct 19 2010, 07:03 PM) <{POST_SNAPBACK}>

Hi,
I'm thinking about trying ATI Crossfire in FSX, but i'm not sure if it will make any difference to my fps.
I'm currently running the ATI HD 5670 on one screen. Is anyone running Crossfire or know if it will work with FSX?
Thanks

The short answer is "not without tweaking" according to this post:
http://forum.avsim.net/topic/293177-i-got-...working-in-fsx/

I'd be very interested to see if anyone here has got SLI or Crossfire working in FSX, and if so, what the difference is between single and dual card. In the early days of FSX - even post-SP2 - I remember reading in a nubmer of places that there was no appreciable frame rate increase with dual graphic cards, regardless of whether they were ATI or nVidia. Of course, the "guru" wisdom of the day also said that graphic cards play only a minor role in FPS in FSX, and we all know that isn't accurate.

[Charl]

Well...I waited to reply, hoping someone would come up with a little miracle here.
I have an FSX install on a Crossfire rig.
Nothing I found could confirm any performance improvement using this - there are no FSX profiles.
And for good reason - FSX was never designed to utilise multi-anything.
(SP2 had a go but only manages some CPU hyper-threading under certain conditions.)

There is the usual forum blather here and there.
But I think it may be that someone owning a Crossfire setup wishes more than anything that it can somehow fix FSX performance.

The best bit of info I came across was that Crossfire slightly degraded FSX performance.

[IslandBoy77]

QUOTE (Charl @ Oct 20 2010, 08:53 AM) <{POST_SNAPBACK}>

The best bit of info I came across was that Crossfire slightly degraded FSX performance.

To save re-doing all your hard sleuthing work, would you mind posting a link or 2 to what you found? So your rig is x-fire capable, or you have 2 graphics cards in there actually running under X-fire? If the latter, do you have the set up for some other application (game?) other than FSX?

Cheers

[Charl]

QUOTE (IslandBoy77 @ Oct 20 2010, 09:43 AM) <{POST_SNAPBACK}>

To save re-doing all your hard sleuthing work, would you mind posting a link or 2 to what you found? So your rig is x-fire capable, or you have 2 graphics cards in there actually running under X-fire? If the latter, do you have the set up for some other application (game?) other than FSX?
Cheers

I'm going back a fair way with this thought, you need to find Phil Taylor's blogs on the subject.
Here's one, there are others:
http://blogs.msdn.com/b/ptaylor/archive/20...multi-core.aspx

I have
Graphics: 2 x ATI Radeon HD 4850 512MB GDDR3 PCI-E 2.0 CrossFire Ready Video Card in CrossFire
as described here
http://nzff.org/forum/viewtopic.php?t=13010

It's actually the kids' machine, and it absolutely eats their flashy Shooter games.
Whose graphics make for a little mental down-justment on returning to MSFS ...

[IslandBoy77]

QUOTE (Charl @ Oct 20 2010, 12:47 PM) <{POST_SNAPBACK}>

I'm going back a fair way with this thought, you need to find Phil Taylor's blogs on the subject.
Here's one, there are others:
http://blogs.msdn.com/b/ptaylor/archive/20...multi-core.aspx

Awesome, thanks for that - I'll look into it later

QUOTE (Charl @ Oct 20 2010, 12:47 PM) <{POST_SNAPBACK}>

Whose graphics make for a little mental down-justment on returning to MSFS ...

Had to laugh at that one - I find the same after a Far Cry or Battlefield 2 session...