Fallout: New Vegas and Crossfire

Hey guys

Was just wondering if your 2nd GPU is being used in New Vegas? My 2nd GPU seems to get no load and this includes after my 2nd GPU was replaced due to it being faulty.

The performance is great on one card. If I enable crossfire however then the game will crash after a while and there is no difference between Crossfire being on/off in terms of performance.

Just wondering if anyone if having these issues?

 

nope no CF. i use GPUZ and it shows that second card doesnt show any temp changes.

 

What drivers/profiles are you using? Both of my GPU's are being used.

 

10.10 ati mobility and 10.10 profiles.

 

from what i heard fallout nv is preatty the same a fallout 3 and i never knew if it ever used my second car but it still ran fine on one so i didn't bothered

 

Strange, both of my GPU's hit high 60's with the game running.

edit: are you running 10.10 or 10.10c? 10.10c had some sort of fix/improvement for FOV, that's what im running.

 

Running 10.10 I think.

 

try switching to 10.10c, there is info on how to do it towards the end of the 10.10 thread. Both of my GPU's are being used by the game.

 

Thanks I will look into that.

 

It does for me, both cards are about 60C when I play. I get a pretty constant 60 FPS all ultra settings, never goes below 50 FPS. You may want to look into downloading a mod for the game that drastically increases your framerate though. Search for the performance fix, it helps out a lot.

 

Mine works too. Around 55-60C for the temps, two GPUs. Before the performance fix, I get tons of micro-stutter in the world map.

After the fix, things seem to calm down a bit but I get occasional split-second freezes when I'm traversing the world map. I guess the game must be loading or something, funny it didn't happen on the old Fallout 3. :/

Also, after 10-15 minutes I get insane amounts of stuttering. Checked temps, were fine. The only solution is to alt-tab out and go back in. Then things become smooth as butter. Weird. -.-!

Thus far, that's my only gripe. Set all settings to Ultra, only left Water multisampling at Low.

 

If New Vegas uses the same engine as original Fallout 3, I hope this may help.

GAME FREEZE FIX:

Open up the fallout.ini file in: My Documents\My Games\Fallout3
Find the line:
bUseThreadedAI=0
change it to:
bUseThreadedAI=1
Add another line after it and insert:
iNumHWThreads=2
This will limit the game to 2 cores and prevent the engine bug from causing the game to freeze.

 

Thanks , still looking into these tweaks and profiles. Any links to the performance tweak/Xf profiles?

 

I use this one:

Alternate D3D9 fix for ATI plus D3D9Gen at Fallout New Vegas Nexus - New Vegas mods and community

 

Mine works just fine, on Ultra details with just 1 card. But then again, I play off SSD. No stuttering at all, and I am almost finished with the "Yes Man" quests (so I have played quite a bit).

I use latest Dell drivers and their latest VBIOS.

 

I use an SSD also and I'm at 90 hours played. 52 hours for the first play through

 

I assume I am DLing the the file in the Optional Menu?

 

Yes I am also getting this with one of the D3D9s.

 

I downloaded it awhile ago when there was only one file, I attached the one that I'm using. I have no stuttering and the game works great for me.

 

Are you using 10.10c and the application profiles?

 

On Application profiles.... I tried to use them few times to improve WoW performance but didn't really find them all that useful. Do they make any other difference vs you simply changing graphical details?

 

They are suppose to improve your driver optimizations when playing games that support Dual GPUs. The latest profiles do support NV but CF just does not seem to work. Still plays well though.

 

in 10.10c the slave GPU changes in temperature, but in game, the FPS is the same as single GPU.

 

To me it was noticeable that the FPS was smoother but it was only a minor change. Certainly not worth the amount of crashes however. Also I have found that putting the system into Sleep/Hibernate will bug crossfire and cause NV to crash until a reboot.

 

Has anyone tried the ATI crossfire logo to prove that it is running crossfire. I checked mine on but it doesnt come up at all? also im running 10.10c any thoughts.

 

crossfire doesnt work for me unless i add d3d9.dll but that actually dips my fps... so it now runs on one card...

 

Well in went into the render path and changed sli to yes and it ran well althought I exited the game to see if it saved and it still defaults to no on sli? weird?

 

For me it would just crash the game loads. So I deleted the d3d9.dll and let Vegas make it's own while I run it on one card.