is it stupid to crossfire with an XTX?

[Steelski]

Originally posted by: Alaa
how wont it clock down while the mastercard is clocked down!?? anyway if u like it, get it

Because it has more inteligence than you you prune!!!!!!!!!!!!!!!!!!!!

 

[Cooler]

Just to let you all know a xtx crossfire will oc the Master card as well they will match the speed. Its still not worth geting the xtx.

 

[nRollo]

Originally posted by: Cooler
Just to let you all know a xtx crossfire will oc the Master card as well they will match the speed. Its still not worth geting the xtx.

Do you have a link to this info, or are you just speculating?

 

[akugami]

Everything I've read says the master card causing the XTX to underclock to XT speeds. However, it gets wierd because some benchmarks have the XTX crossfire performing the same as an XT crossfire and some benchmarks show the XTX crossfire performing better than the XT crossfire. At this point, it can go either way since some of the data could mean the drivers are not optimized for some games in crossfire or it could mean the XTX crossfire actually does overclock the master card.

In any case, I don't think crossfire has all it's bugs worked out. There seems to be some major performance issues where there is no boost or actually a decrease in performance over a single XT/XTX card. Need to fix these crossfire bugs in a future driver release I'm thinking.

 

[deadseasquirrel]

Originally posted by: akugami
However, it gets wierd because some benchmarks have the XTX crossfire performing the same as an XT crossfire and some benchmarks show the XTX crossfire performing better than the XT crossfire.

Are there any reviews that have compared the XTX Crossfire to the XT Crossfire? The only ones I have found show either one or the other, and sometimes throw in an X1800XT Crossfire for comparison. But I haven't seen any that show both the XTX and XT in Crossfire in the same review. To me, that is key, since you can't be sure how benchmarks are peformed from site to site (even if the settings are the same).

 

[Alaa]

Originally posted by: Steelski

Originally posted by: Alaa
how wont it clock down while the mastercard is clocked down!?? anyway if u like it, get it

Because it has more inteligence than you you prune!!!!!!!!!!!!!!!!!!!!

u dont have a brain to comment me anyway
and for the one who is asking about SLi performance go and check AT's review

 

[M0RPH]

Not sure what the fuss is about. Anyone who is buying a X1900 Crossfire setup is going to be saavy enough to go into CCC Overdrive and turn the clocks up to the XTX speeds on the master card. It's not like a small overclock like that is going to be any problem.

It'd be nice if it did it automatically like someone above said, but I haven't heard that.

 

[akugami]

Anandtech's X1900 review has the breakdown on XTX Crossfire as well as XT Crossfire. FiringSquad's Crossfire review is up...I haven't went back to check what drivers AT and Firingsquad was using but Firingsquad doesn't show the anomalies that AT's review did. Then again, most of the wierd results show up in very high resolutions, above 16x12 which Firingsquad doesn't have.

 

[deadseasquirrel]

Originally posted by: akugami
Anandtech's X1900 review has the breakdown on XTX Crossfire as well as XT Crossfire. FiringSquad's Crossfire review is up...I haven't went back to check what drivers AT and Firingsquad was using but Firingsquad doesn't show the anomalies that AT's review did. Then again, most of the wierd results show up in very high resolutions, above 16x12 which Firingsquad doesn't have.

Naw, neither of those have BOTH a 1900XTX Crossfire and a 1900XT Crossfire. They both have the XTX Crossfire and an 1800XT Crossfire.

 

[Geforcer]

I have a question about CF. In regards to SLI, when it first came out, hardly any games supported it. As SLI matured, more games became supported. Is Crossfire the same way, or is it designed to work with any game out the box, without the game or drivers specifically supporting it?

 

[nRollo]

Originally posted by: Geforcer
I have a question about CF. In regards to SLI, when it first came out, hardly any games supported it. As SLI matured, more games became supported. Is Crossfire the same way, or is it designed to work with any game out the box, without the game or drivers specifically supporting it?

You are confused.

In regards to SLI, when it first came out, hardly any games supported it. As SLI matured, more games became supported.

What you are calling "support" is "profiled" it seems. You can run SLI on any game, the profiles are just settings that nVidia tested.

Crossfire works in the same way with one important difference:

You still have profiles and defaults, but with Crossfire you are stuck with the defaults, even if they don't work on the game. Worse yet, the default for D3d (most games) is tiling, a mode that does not scale geometry.

 

[akugami]

Originally posted by: deadseasquirrel

Originally posted by: akugami
Anandtech's X1900 review has the breakdown on XTX Crossfire as well as XT Crossfire. FiringSquad's Crossfire review is up...I haven't went back to check what drivers AT and Firingsquad was using but Firingsquad doesn't show the anomalies that AT's review did. Then again, most of the wierd results show up in very high resolutions, above 16x12 which Firingsquad doesn't have.

Naw, neither of those have BOTH a 1900XTX Crossfire and a 1900XT Crossfire. They both have the XTX Crossfire and an 1800XT Crossfire.

On closer inspection you're right. I can chalk this up to little sleep and being overworked. Place I work at is swarmed with business lately for Chinese New Years, which is on Jan 29 this year.

But that still doesn't explain why sometimes the Crossfire configs are worse performing than the non Crossfire configs in higher resolutions unless it's a driver issue.