390X Crossfire low performance, both single card and crossfire

[Kian Palmer]

Hello,

I've been having a very annoying fps problem with my 390X's ever since a month after launch when I got them.
They perform horribly in games but benchmarks are fine for some reason.

All data/numbers stated below is with a 1080p monitor @ 60 Hz

Temps are fine, 51C on both max load, watercooled
CPU temps are also around 45C max

I get less than 60 fps in pretty much every game I have, no matter if Crossfire is enabled or disabled. Messing with all the different Crossfire modes (AFR friendly, 1x1 optimize, etc.) doesn't do anything

Stuff I've tried and noticed:
- Minimum and maximum graphics settings yield same FPS, very confused about
- Tried disabling ULPS in registry
- Tried bringing RAM back to 1333MHz
- Disabled CPU C-states, also did a couple BIOS settings resets
- Swapped motherboards with an MSI Z97 XPower AC, no difference
- Reinstalled graphics more times than I can count
- Went from Windows 10 Home back to Windows 7 Pro

*Cards are not overclocked*

GTA V is especially bad, maybe 40 fps average when I've been finding 184 fps is supposed to be ideal according to http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1638&page=2


As the title states, I get no different performance if I use a single card. Both cards individually yield exact same performance as the two in Crossfire


Specs:

Intel i7-4790k (now at stock clock, was overclocked before)
Corsair Dominator Platinum DDR3-2133MHz C9
EVGA Z97 Classified motherboard
2x XFX 390X
Corsair AX1500i
Samsung SM951 w/ PCI-E adapter
Windows 7 x64

Tried graphics drivers 16.3.1 - 16.9.1


Benchmarks:

Unigine Heaven

FPS
XFire - 91.7 FPS
Card 1 - 59.6 FPS
Card 2 - 58.9 FPS
~77% scaling

Score
XFire - 2310
Card 1 - 1501
Card 2 - 1483
~77% scaling

Min FPS
XFire - 9.0
Card 1 - 18.8
Card 2 - 10.5
rip scaling

Max FPS
XFire - 172.5
Card 1 - 123.4
Card 2 - 119.6
~71% scaling


CPU-Z Single Thread =1999

CPU-Z Multi Thread = 8600

Passmark CPU = 12249

Cinebench R15 CPU = 885


Crossfire scales appropriately in benchmarks but about 0% in games, lol

The below link seems to be a fair representation of the performance I should be getting
http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1638&page=2

I'm can't see proper performance with even 1 card

My initial plan was to go 4k but I guess I can't exactly handle 1080p yet 🙁

Any help would be greatly appreciated, thank you very much!!

 

[sizzling]

Crossfire drivers are hit and miss, just lucky if the games you want to play are supported. Benchmarks tend to have good driver support. GTA V has notoriously bad crossfire support, for a long time crossfire performed worse than a single card but things I believe are slightly better now but not great.

 

[Kian Palmer]

Crossfire drivers are hit and miss, just lucky if the games you want to play are supported. Benchmarks tend to have good driver support. GTA V has notoriously bad crossfire support, for a long time crossfire performed worse than a single card but things I believe are slightly better now but not great.

Oh okay, thanks for the clarification on the Crossfire support. I was thinking maybe it's a coincidence that none of the games I have support Crossfire well, haha!. I've found that overclocking the cards + CPU to achieve framerates of above 60 fps is a decent bandage. Not sure what more there is to do at this point, but thank you for your answer! Helped me understand what is going on