Is my Phenom 9950 bottlenecking my 4870 512 Xfire setup?

Hello all

I have a Gigabyte 790FX Mobo

4 GB OCZ Gold DDR2 800 RAM (5,5,5,18)

Phenom 9950 w/ Sunbeam Core Contact Freezer

Sapphire Radeon 4870 512mb

ASUS Radeon 4870 512mb

OCZ Core Series 30GB MLC SSD

2x WD Caviar 160 GB HDDs RAID 0

24" Gateway LCD

I am having problems with crossfire scalability.

In most games (I have another 17" monitor) I am only getting about 50% load on each GPU during games.

GRID, Bioshock GoW PC(this only loaded 1 GPU 50% so it doesn't count XD)

L4D, CoHF.

I also am getting wierd graphical stutters in GRID - I will get frequent very short frame drops.

Phenom is running stock 2.6

Windows sidebar shows that I'm not maxing out any cores on my Phenom

any Ideas - I am looking at selling one of my 4870s and/or getting a Phenom II 940

or doing nothing - that's always an option

Power Supply is Rosewill 750W and I'm running Vista 32bit

Some CoHF Benchmarks:

Everything turned all the way up w/8X MSAA

CrossFire enabled:

Average - 39.4 35.0 34.8 39.7

Max - 61.3 60.0 61.3 60.9

Min - 8.0 18.3 13.7 11.9 13.5

Crossfire Disabled:

Average - 35.9 34.4 38.0 36.5

Max - 61.7 61.5 61.0 60.4

Min - 18.9 18.9 8.8 9.2

V-Synch seems to be enabled however there is no option in-game to disable it

BTW CoH is a Steam copy and I used the built in benchmark tool

going to go test WiC now XD

What do you mean V-sync seems to be enabled ? It should say in the CCC, there is a tick box if it is enabled then un tick it and see what happens.
As far as bottlenecks are concerned, no there wont be a bottleneck. Will it run faster with a better CPU ? Yes it will run faster with a better CPU but that dosent mean you are bottlenecked its restricted but not bottlenecked.

Mactronix