crossfire not working well.

[M.I.A TIDNAB 13]

ok so i thought somthing does not feel right with my fps. so i set about testing them on the benchmark..

arma2 benchmark 1

1x (single) hd 7770 2048 MB graphics card. 1920 x 1200 = average fps 31

2x (crossfire) hd 7770 2048 MB graphics card. 1920 x 1200 = average fps 37

all settings on very high.

atoc.. trees only

ppaa.. disables

postprocess.. disabled

.............................

with profile set to arma2 demo. average fps 39...

so it seems my crossfire card isnt really working with arma2/dayz.. has anyone come across this before id sure like some help.

i was thinking power supply.. but after testing via 3dmark11 im not so sure...

3dmark11

1x (single) hd 7770 2048 MB graphics card. 1280 x 720 =p3651

2x (crossfire) hd 7770 2048 MB graphics card 1280 x 720 =p6634

Driver version 9.1.0.0

Catalyst Version 12.9

.............................................

my system is.

i7-2600K Processor

8192 MB Mushkin ram

2x ssd OCZ-AGILITY3

Gigabyte Z68XP-UD4 motherboard

64-bit Windows 7

620w power supply

26" monitor hence 1920 x 1200.

i know i should be able to run this with no problems. dayz is like 50-60 fps in woods. but drops to as low as 19 at times.... sorry for the long post..

[M.I.A TIDNAB 13]

anyone ?

i could really use some help on this 1.. plz.

[pawel187 0]

At first sorry for my english if I'll make mistakes or sth... Man I bought second 7870 for dayz and arma and I was very disapointed with performance of crossfire. My spec is i5 2500k oc 4.8, 8 gigs ram 1333 and radeon. I was able to play dayz on single card (GPU ussage shown on msi afterburner - 99%) with about 30fps with little stuttering (all details very high, only AA normal). Crossfire 7870 got me about 30-35fps and lot of stuttering (GPU ussage on both cards about 30-60%) It was lot worse than single card. I was trying lot of things (diffrenet drivers, etc), Than I decided to check if my HDD didnt bottlenecked rest of my spec... and then I discovered ramdisk... man that was IT... I limited my fps at 60 with afterburner, turn vsync on and now I play Dayz with constant 60 fps without stutters (80-99 GPU Ussage on both 7870) , even with fast rotating camera, no stutter or fps drops at all. Small stutter and fps drop occur only from time to time when game load something that I had to left on my HDD. I made 3 gigs disk ram and copy most importenet pbos from Addon folder and @DayZ (On monday I'll get 32g of ram, make 20g diskram and install all game on It :)). You can find some easy tutorials how make arma run from ram disk... about Arma Benchmark... I'm not sure what files I should copy for benchmark so I've run It with same files that I use for Dayz and few from common folder... All details Very high, AA Normal Distance 2400... Crossfire HDD - 46fps ... Crossfire Diskram - 75fps :)

Since U use SSD I'm not sure Is that Case of Your problem tho

Edited October 20, 2012 by pawel187