2 x HD4850 in CF

[MiNxYyY]

Currently running a single HD4850 on Asus P5Q Deulxe.

First Question is :

Will i see a difference adding a second HD4850 to my current rig?Gamewise.

Is there much differnce from running two cards at x16/x16 and x8/x8?

Is a 670PSU enough to power two of these cards?Its a hiper PSU.

I play @ 1920 x 1200 on every game which is smooth but i dont add any AA,so will having 2 cards Boost my performance noticabley?

 

[Boogle]

I play @ 1920 x 1200 on every game which is smooth but i dont add any AA,so will having 2 cards Boost my performance noticabley?

If it's already smooth, what to you expect to be better? Smooth can't be made smooth, its already smooth

The second card will let you enable AA though. And yes your mobo will hold you back a little unfortunately.

 

[easyrider]

The difference between running a p45 chipset at 8x8 over an x38 mobo 16x16 is nominal and you will not notice in real terms.

I would argue if one was to look at a game running xfire on p45 against a x38 mobo the user would not tell the difference.

You will see a few points lost in benchmarks but nothing to worry about in real world gaming.

1920 x 1200 resolution will see nice gains with 2x 4850's in xfire especially when you pile on the AA and AF.

 

[braveheart]

you need plus 2 cards into PCIE x16 and enable as CF that would work fine

it worked for me when I enabled 2 cards into SLi mode (2xGF9600GT XXX) and look good in 1920x1080p @ 60mhz via HDMI cable it so cool

 

[Boogle]

The difference between running a p45 chipset at 8x8 over an x38 mobo 16x16 is nominal and you will not notice in real terms.

Article here: http://www.tweaktown.com/articles/1472/1/intel_p45_vs_x48_crossfire_performance/index.html

 

[easyrider]

Unless its gaming at higher res the p45 sees little loss in perfromance

 

[Jakus]

If That's the article I think it is ...they are Muppets don't read it untill after You have Your crossfire up and running !

I run 2 x HD 4850's on the Asus P5q delux, As Easy said You WILL NOT be bandwith limited PCIex 2 is double the bandwith of 1.1 so 2 x8 = 2 x16 old money.
One of our Forum Members reviewed this board with 2 3870X2's in crossfire against a X38 Board and found no difference