Mirror's Edge+TH2Go+SLI performance solved

DARKSEID · Post by **DARKSEID** » 21 Nov 2009, 16:58

Hi guys. I am relatively new to the scene of surround gaming. I have two 260GTX(216sp 1.8gb edition) in SLI mode. When i tried to play the game in a resolution above 1920x1200 (ex. 3840x800) the frames where terrible. The fov hack which was posted here (Thanks to the incredible Racer_S) DID NOT CHANGE my perfomance at all. So having read the posts about the poor perfomance when activating the hack i started playing with the sli profile in my nvidia control panel. When i forced the sli mode(alternative or other modes) the perfomance was terrible. When the sli mode was set to be controlled by the program the perfomance was also terrible. But when i set the SLI profile for this game to SINGLE GPU then the frames almost doubled.
Before this i couldn't play the game in 3840x800(fov hack-medium settings 0xaa). Now i play it in 4320x960(fov hack-highest settings 4xaa) with 30fps.
So the key, for me at least, was to force SINGLE GPU in the sli profile for the mirrors edge.exe. Now i can finish it again :lol:

I am looking forward to your comments
Thanks

Post by **scavvenjahh** » 21 Nov 2009, 18:59

Thanks for sharing your findings and welcome aboard ! Please refrain from using CAPS in titles ;)

Are you playing ME with PhysX effects on by any chance ?
http://forums.nvidia.com/index.php?showtopic=150597&st=0&p=950250&#entry950250
SLI = main GPU takes care of PhysX, both GPUs render graphics.
No SLI = main GPU only renders graphics, second GPU takes care of PhysX.
The second setup can lift bottlenecks in recent PhysX games, that may be what happens here.

DARKSEID · Post by **DARKSEID** » 21 Nov 2009, 19:53

hi scavvenjahh. Thanks for your advice. As for the ME i have the physx off. I will test with physics on and let you know...

[email protected] · Post by **[email protected]** » 23 Nov 2009, 05:11

WOW awesome will test!

DARKSEID · Post by **DARKSEID** » 24 Nov 2009, 20:16

hi to all again. I tested with physics on and the perfomance hit was not noticable(maybe 2 or 3 frames lower) :D

Post by **scavvenjahh** » 25 Nov 2009, 21:36

There's something fishy here. ME's SLI scalability is great. I see no reason why the fov hack would negatively affect SLI performance, so without PhysX FX you should always get a better framerate with SLI on. :?

[email protected] · Post by **[email protected]** » 01 Dec 2009, 03:30

How do I set the SLI profile for this game to SINGLE GPU?

whismerhill · Post by **whismerhill** » 01 Dec 2009, 12:35

How do I set the SLI profile for this game to SINGLE GPU?

if you want the most efficient way to deal with this, I'll suggest getting nhancer ( http://nhancer.com/ )
best application to change profile settings around IMO

Maxi · Post by **Maxi** » 02 Dec 2009, 20:31

Nice find :)

I was wondering has anyone tried this using Eyefinity? I've set my resolution to 5760x1080 and get some horrible menu stretching which is expected but then the game only runs on the centre screen :(

I was really looking forward to trying this with 3 monitors!

Post by **scavvenjahh** » 03 Dec 2009, 18:20

Sounds like you're not using the camera hack :?
Mirror's Edge : Detailed Report
Racer_S hacks

Maxi · Post by **Maxi** » 04 Dec 2009, 11:10

Whoops didn't realise I needed that! Already had a FOV hack so thought that would do it hehe.

Thanks scavvenjahh I'll try that tonight and see how it goes :)

tineras · Post by **tineras** » 05 Dec 2009, 02:33

I also needed to turn off SLI in order to get a decent framerate. Otherwise it was really choppy. Still, I was hoping for better FPS with my specs.

How many FPS are you guys gettings?

Post by **scavvenjahh** » 05 Dec 2009, 11:47

Keep in mind ME's engine was definitely NOT designed for that sort of extreme aspect ratios. The way the lighting works has a huge impact on performance beyond a 16:9 AR. Not to mention the limited VRAM available to SLI'ed GTX275 - especially with PhysX on, that's a lot to handle for the primary card.
When the framerate is a problem, lowering the resolution helps a lot. 3x 1280x800 is what I used the most in ME. And the FOV hack works great in single-screen modes too by the way ;)

HowlingBlue · Post by **HowlingBlue** » 10 Dec 2009, 19:02

Sounds like you're not using the camera hack :?
Mirror's Edge : Detailed Report
Racer_S hacks

Hmm, just gave it a try to test out my new Eyefinity rig, and for some odd reason, I can't even get it to work... I press * on the numpad and I still have the same viewport as before...disappointing... :(

tineras · Post by **tineras** » 10 Dec 2009, 19:16

[quote]Sounds like you're not using the camera hack :?
Mirror's Edge : Detailed Report
Racer_S hacks

Hmm, just gave it a try to test out my new Eyefinity rig, and for some odd reason, I can't even get it to work... I press * on the numpad and I still have the same viewport as before...disappointing... :(

Have you tried the checkbox that starts it automatically? I forget the exact text. Also, did you try the recommended FOV settings? The default ones will not change the image at all when you press '*'.

For 3840x1024 (3.75:1) - Aspect 3.75 FOV 0.012575
For 5040x1050 (4.8:1) - Aspect 4.8 FOV 0.013500

You might just need to play around with it so see what works for you.

HowlingBlue · Post by **HowlingBlue** » 11 Dec 2009, 00:55

Yeah, I've tried both the auto enable box and the numpad * key, but neither change the viewport past its standard anamorphic resolution.

I have it set for 5040x1050, my resolution as well. I remember having problems with this hack with my TH2go as well... Don't remember how I fixed it...

tineras · Post by **tineras** » 11 Dec 2009, 01:20

Yeah, I've tried both the auto enable box and the numpad * key, but neither change the viewport past its standard anamorphic resolution.

I have it set for 5040x1050, my resolution as well. I remember having problems with this hack with my TH2go as well... Don't remember how I fixed it...

So the sliders on the FOV Hack do nothing to the image?

http://www.flickr.com/photos/tineras/4174820853/

I use these settings (it's not right in the picture):
Aspect: 4.8
FOV: 0.0135

EDIT: And I'm assuming you are leaving the FOV Hack program running while the game is going?

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