Crossfire Support?

[Michael Hornbuckle]

I have two 6950 vid cards crossfired...when I make profile for crossfire options are default, afr friendly, 1x1, and use amd predefined...

which one of these should I use? I have everything else in CCC to use application settings....I am steadily playing with settings and I can get tp to run smooth with 80+ fps but no matter what the armco barriers look like there is no AA....my current monitor is 42" 120mhz vizeo tv with 5ms response.

all other games (except rf2) look crisp and clear...please help
also, is there any way to lock frames other than vsync at 60?

 

[Hampus Andersson]

I´d be interested to know the scaling of AC, SLI/Crossfire and single card.

 

[Luke Russell]

Just sitting in the car at the default hot-lap position:

Single card: 54fps
Both cards: 108fps.

Will use a replay as a benchmark tomorrow.

 

[Hampus Andersson]

That´s a 100% increase, pretty astonishing,

In contrast a game like BF3 has around 50% scaling..

 

[baloche]

the only problem with crossfire is the spikes
otherwise i have 90-100% scalling

you can also use this :
"home" key and write set fpsCap xx
where xx is the fps you want

 

[Luke Russell]

With Crossfire Off: Min:39, Max:50, Avg: 45.144

With Crossfire On: Min:75, Max:100, Avg: 90.33

 

[Majnu]

I´d be interested to know the scaling of AC, SLI/Crossfire and single card.

sli doesn't work

 

[Hampus Andersson]

sli doesn't work

It does..

How else would my GTX580´s be able to project images on three screens when i only have 2 DVI connections on one card?

 

[Majnu]

ok then sli isn't optimised. My second card just sits there at 2d clock speeds.

 

[Hampus Andersson]

ok then sli isn't optimised. My second card just sits there at 2d clock speeds.

Make a comparison.
FPS with one card and with 2 cards.
That way we know the scaling.

I´ll do one later today with my cards and see too.

 

[Majnu]

Make a comparison.
FPS with one card and with 2 cards.
That way we know the scaling.

I´ll do one later today with my cards and see too.

Will do.

 

[baloche]

a friend of me find something for SLI , he said on the official forum to use Batman arkam city profile's
it's not a joke it work with his computer

sorry for my english

 

[Majnu]

Specs

670 SLI
3570K
16Gb RAM
1X120Hz 750D Monitor

Video Settings

Fraps


SLI ON
Frames, Time (ms), Min, Max, Avg
18294, 137281, 89, 160, 133.260

SLI Indicator even though was on to show the scaling it did not show in game.

Top Left Reads (X2 for SLI):
GPU Core Clock
GPU Usage
Memory Usage

SLI DISABLED
Frames, Time (ms), Min, Max, Avg
13984, 122187, 89, 136, 114.448
Top Left Reads
GPU Core Clock
GPU Usage
Memory Usage

Yet when I enable higher settings the cards will grind to 25FPS, which either indicates my card is faulty or the game is poorly optimised at this stage.

baloche I'll add Assetto Corsa to the Batman profile and test again.

Cheers

 

[Hampus Andersson]

I hope you used the same image when doing the test?

 

[Majnu]

It made no difference with regards to the image, whether I was racing or in the pits the second gpu clocks stayed the same. As you can see from the min/max/avg Fraps scores the scaling is very bad atm.

With regards to the Batman Arkham City Profile when I added AC to the profile when I started the game it started to flicker.

 

[baloche]

i'll search his post
if i found it i put it here

 

[patrod78]

Here, it is

http://www.assettocorsa.net/forum/index.php?threads/no-sli-support.253/#post-2986

 

[CKraegel]

did some of you crossfire users test the new catalyst 13.8 beta?? i read this driver shall help minimizing issues with crossfire

 

[Antonio Crinò]

Any news on SLI support?

I'm getting a second gtx 660 ti, there is the smell of AC preorder, but nothing up to date for testing my configuration!