xt1900 and crossfire

[HAz]

Hi

im thinking about getting a x1900xt and then later another one.
What i need to know is,do the x1900xt's all work with crossfire? or do i have to look out for a certain model?


and with corssfire do both cards have to be same make and model?

i was thinking of getting the asus crossfire mobo but not sure on the x1900xt yet.

cheers

haz

 

[HEADRAT]

I think they need to be XT-X's (rather than just XT's) to work in crossfire mode

 

[squiffy]

No 1900XT's will work in Crossfire. All you need is a X1900 Master, with a X1900XT or XTX slave, and a 480 or 580 chipset. You can buy any make.

 

[LoadsaMoney]

Yes they all work with Crossfire, just make sure ones a mastercard.

You can mix, and match brands no problems.

 

[raja]

HI,

You need a 1900 Crossfire master card to run Crossfire, this needs to be teamed up with either a 1900xt or 1900 xtx, you can't use another model like 1800xt. Both cards need to be from the same chipset. At moment ATI have not revealed any plans to make the 1900 series Crossfire capable without the black wire dongle (AFAIK). The rumours that were in circulation as to why the 1900 will retain the dongle, revolved around the lack of available bandwidth accross the pci bus. This may have changed, so don't flame me if I'm wrong. BTW I have the 1900 master card and 1900XTX in Crossfire.

Raja

 

[FrankJH]

THere is a rumour ( I havent seen it confirmed or denied on ATI's site, but it may have been) that come May there will be drivers which enable two standard non-master X1900's of either type to be used in crossfire mode with a 580 based mobo.

It was talked about here awhile back, which is where I read it - but nothing at that point was on ATI's website (on there where it talks about Xfire it doesnt mention mastercards at all on one page, just two X1900's...)

/edit they have changed their site since I saw it and now mentioning requirement for mastercard which is a bummer

 

[raja]

I think it is true that the pci bus would struggle with all the information required for Crossfire to run on high speed/bandwidth cards ala 1900 series.

 

[FincH]

guys al i see on ocuk is 1 make of master card yet it has no brand, is this normal ? and is this card anygood?

EDIT; posted on bros account HAz

 

[daftVader]

guys al i see on ocuk is 1 make of master card yet it has no brand, is this normal ? and is this card anygood?

EDIT; posted on bros account HAz

The brand seems to be variable. I had to RMA a brand new Sapphire master (was basically doa) and they replaced it with an HIS model. A b-grade one at that which i'm not terribly impressed with.

That aside, as far as I know they're all manufactured by ATI anyway... just have different stickers on them.

 

[LoadsaMoney]

It was rumoured to be the x1800's that wont require a mastercard, and the drivers were the Cat 6.4's in May.

 

[S_D]

It was rumoured to be the x1800's that wont require a mastercard, and the drivers were the Cat 6.4's in May.

Just to go one stage further I think it's actually only the 1800GTO and only then on a RD580 motherboard, as this is the most they can put across the bus.

Simon.

 

[FrankJH]

this may have changed but it was definitely rumoured the high end Xfire config (with x1900's) would be working like this also - remember also that x1800's are meant to be being phased out soon ( I seem to remember Gibbo saying this a while ago)

this may well have changed though (and knowing my luck it has!!!)

 

[turbotoaster]

the problem is i think, it will stay a rumour, crossfire works by each card working on 1/2 the pixels on a screen, if one card porduces white and the other black, it would look like a chess board

the normal card(black) sends the info to the crossfire card through the dongle which uses its extra chip(forgot the name of it) to add its (white) pixels to the mix then sends it to ya monitor