Some Great SLI Scaling Results (non-default SLI comp. bits)

Spinelli · Jul 13, 2015

As of rFactor 2 b982, I seem to be getting pretty-much perfect SLI scaling using the SLI compatibility bits 0x02D04005 (LEGO Batman 2, etc.) - RF2 thread here

I decided to try the same compatibility bits with SCE...

Interlagos 2 @ 12:00 AM (night time is more graphically demanding)
Camaro (headlights on)
Cockpit view
Maxed out graphics
Level 2 AA
6000 x 1080 (5760 x 1080 w/ bezel compensation)
Multiview

Default SLI Comp. Bits = 0x00000000: ------------------------ Avg: 202.197 - Min: 150 - Max: 267
SLI Comp. Bits = 0x02D04005 (LEGO Batman 2, etc.): Avg: 310.336 - Min: 229 - Max: 406

Wow, fantastic!!!

The weird thing (In SCE's case) is that GPU usage was the same in both tests - high 80s to low 90s % for both cards. It therefore seems like GPU usage shouldn't be the only thing looked at when determining SLI GPU scaling.

Billy Pilgrim · Jul 13, 2015

Thanks, @Spinelli , for this great info.

It's great news for rF2 too. I'll probably buy it now (although I don't know how I'm gonna find time to get into it - I got AC and pCARS recently and have only just scratched the surface of them).

We're spoiled for sims at the moment. Can't complain

Spinelli · Jul 13, 2015

You're welcome. I should to do more tests (for example, lots of cars on screen) but this is extremely encouraging.

I repeated the test twice because I just couldn't believe it at first, lol!

RF2 and then SCE are my fav but those other two are fun too! I've had a blast playing R3E as well

JoelGL · Jul 14, 2015

Any Compatibility-bits for us non-SLI 970 users?

dsuspense · Jul 14, 2015

GeForce GT 650M SLI

GSCE tests:

Track - Spielberg Vintage
Car - Formula Retro Copersucar

Default compatibility bits (0x00000000): Min: 74 - Max: 94
SLI Bits 0x02D04005 (LEGO Batman 2, etc.): Min: 124 - Max: 150
SLI Force alternate frame Rendering 2: Min: 124 - Max: 150

Seems SLI bits and SLI AFR2 have the same effect for GSCE on my system.