Crossfire Info

Status
Not open for further replies.
DaveBaumann said:
AFAIK 256MB X800 "Crossfire Edition" = X800 XL.
So all four quads, right.....AFAYK?
(Sorry, I've been following the thread but it's starting to get confusing to keep it all straight. :? )
 
digitalwanderer said:
DaveBaumann said:
AFAIK 256MB X800 "Crossfire Edition" = X800 XL.
So all four quads, right.....AFAYK?
(Sorry, I've been following the thread but it's starting to get confusing to keep it all straight. :? )

yes
 
The names cover the groups - X850 CrossFire Edition covers the X850 boards (but is actually an X850 XT in performance), whilst the two X800 CrossFire Editions cover the various boards in the X800 range. I'm double checking that is is actually an X800 XL in performance (but that would make most sense as it is the middle of that range).
 
And since I'm apparently in crotchety old man mode today, does anyone expect there to be a dime worth's of difference informationally in all these different versions of Crossfire pieces that are due to pop up around the web shortly? Would the functional result to the readers have been any different if ATI had put up their own Crossfire piece at www.ati.com and everyone else just wrote an editorial about it? That's all we're going to get out of this as an individual "value add", right? Punditry & style? Duelling quotes instead of a variety of benchmark scenarios and investigative journalism (not that there is as much of this as we'd like anyway in the best of circumstances, with a few Sterling exceptions :LOL: ).

Yeah, yeah, I know --take it to "Industry". ;)
 
incurable said:
Have you noticed that it wont workin Crossfire mode? According to Tom's, there're three Masters as of now, the X850 XT PE-based one and two X800-based ones.

Now, that X800 XL of yours can only be paired with either of the latter two, forcing it to shut off one of its quads. You'll essentially end up with two X800s, and having overpaid dearly on both. (one because it's really a X800 XL, the other because its a precious Master)

PS: My personal 'favourite' right now is X800 Master + X800 XT PE slave (poor thing). :LOL:

Both 'cheap' CrossFire cards are based on the X800XL afaik and have all 16 pipes so unless you get a 12 pipes slave card, nothing is shut down on your mastercard. There isn't any 12 pipes CrossFire card.

X800XL 256MB CrossFire - $299
X800XL 128MB CrossFire - $249

Obviously the 128MB card is targeted at a very big audience because of the lower price (making it just as expensive as the 256MB version of the 12 pipes X800).

Anyway, CrossFire is just the start of some exciting things to come (not talking R520 here). ;)
 
CJ said:
Obviously the 128MB card is targeted at a very big audience because of the lower price (making it just as expensive as the 256MB version of the 12 pipes X800).

I have a suspicion that $50 "savings" is going to be pretty expensive performance-wise, since these multi-gpu configurations seem aimed primarily at high-res/High-AA gaming. Tho obviously we aren't going to find out today.
 
What, no talk about how ATI will support 4 Video Cards working to produce a single image?

Hrmph, couldn't find a way to attach the image...
treiber-1.jpg
 
incurable said:
Charmaka said:
You're sure that SLI would work on any multi-16x mobo with a driver tweak or similar?
As I'm not working at nVidia, there's no way to be sure, but all indicators point in this direction. We've seen SLi, when used with early, less restrictive drivers, working on Tumwater (x16 + x4), Grandsdale (x16 + x4), NF4 SLi (x8 + x8), NF4 Ultra (x16 + x2) and NF Pro (x16 + x16).

There's probably some kind of lower PCIe lane threshold for decent performance, I'm guessing 4 lanes min, but other than that, it seems like its all drivers. (i.e. no 'SLi magic sauce' required)

Cool, thanks. Wasn't aware of those setups. If that's the case then fair enough.

incurable said:
Charmaka said:
SLI: can't use 6800 Ultra with 6800 GT or vanilla
Crossfire: can use X850XT master with X850 Pro or vanilla
But what's the point of buying a $549 card that is then throttled (1 quad off and downclocked) when run along side that $349/399(?) Pro?

Flexible? Yep. Sensible? Hell no!

I'd table the suggestion (that I've heard many times in other more main-stream tech forums) that for the majority of users any kind of dual-card setup qualifies as "not sensible" :p
 
Humm... the 128MB x800 Crossfire edition looks to be a cheap way to get 16 pipe performance, even if you have no intention of going with 2 boards.
 
thatdude90210 said:
Humm... the 128MB x800 Crossfire edition looks to be a cheap way to get 16 pipe performance, even if you have no intention of going with 2 boards.


I think most people would put out the $50 bucks for the extra RAM though.
 
OK, so why is there a dongle?!!!:

On SuperAA said:
Logically 8x and 12x modes (just straight Multi-Sampling) operating on two well matched boards could perform similarly to 4x and 6x respectively on a single board with like performance, assuming the application isn't limited by the host interface, however we have discovered that in this mode only, for some reason, the transfer of the frame from slave to master occurs over the PCI Express bus which is likely to reduce performance a little.
Jawed
 
The DMS connector is a high density connector that allows for both the input from the slave board and an output from the master, so this port can still be connected to an output device. One thing to note, though, is that it does appear that the CrossFire Edition board loses its TV output capability because of the size the DMS connector needs to be.
So you can output on the DMS connector...but not when it's connected to a slave, right?

however we have discovered that in this mode only, for some reason, the transfer of the frame from slave to master occurs over the PCI Express bus which is likely to reduce performance a little.
Why thru the PCIe for SuperAA?

CJ said:
CrossFire is just the start of some exciting things to come (not talking R520 here). ;)
What are you talking about? :|
 
Status
Not open for further replies.
Back
Top