ATi Cross-Fire limitations found.

nev_payne · 16-September-05, 10:14 AM

Oh dear the word Oops springs to mind. It seems the controller chip for ATi's crossfire setup limits the refresh rate and max resolution...something that Nvidia can easy handle.

The maximum settings are:

1600x1200x 60Hz due to the 165MHz of the SiL 1161chip:

Quote:


	The SiL 1161 is there to receive output passed over the external link from the Slave card in the Crossfire setup and pass it on to the Master card.

LINKAGE HERE to Rage3D...looks like ATi really have been stretched way too far on this one.

reflux · 16-September-05, 12:02 PM

What we really need is an inter-compatible multi-gpu system that'll take both nVidia and ATi cards.

nev_payne · 16-September-05, 12:08 PM

No joke - I think there was an attempt at that with the 6*** series of SLi and the ATi X800. The best they could do was get 4 monitors up and running.

Highperf15 · 16-September-05, 12:51 PM

Quote:

Originally Posted by nev_payne


	Oh dear the word Oops springs to mind. It seems the controller chip for ATi's crossfire setup limits the refresh rate and max resolution...something that Nvidia can easy handle. The maximum settings are: 1600x1200x 60Hz due to the 165MHz of the SiL 1161chip: LINKAGE HERE to Rage3D...looks like ATi really have been stretched way too far on this one.

I think that ATI is figuring that most of your "High-End" users are going to be using the flat-panel LCD monitors instead of the CRTs................

GlitterKill · 16-September-05, 01:04 PM

I currently run my games at that resolution and refresh. I don't run AA, though. To me running without AA looks more crisp. I don't think my setup would run that res with AA well anyways. Sucks to have the limitation but at least the res is capped pretty high. REALLY sucks for those wanting to run high res wide screen resolutions, though.

Hibiki · 16-September-05, 10:32 PM

According to Penstarsys.com (http://www.penstarsys.com/#xfire_sil) the limitation is just the bandwith of the connection between the two cards. The image on the screen will be based on the GPU of the master card.

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16-September-05, 12:02 PM		#2 (permalink)
reflux Sempr0n?	What we really need is an inter-compatible multi-gpu system that'll take both nVidia and ATi cards.

16-September-05, 12:08 PM		#3 (permalink)
nev_payne Apex Tech God	No joke - I think there was an attempt at that with the 6*** series of SLi and the ATi X800. The best they could do was get 4 monitors up and running.

16-September-05, 01:04 PM		#5 (permalink)
GlitterKill Pimp-of-all-Pimps	I currently run my games at that resolution and refresh. I don't run AA, though. To me running without AA looks more crisp. I don't think my setup would run that res with AA well anyways. Sucks to have the limitation but at least the res is capped pretty high. REALLY sucks for those wanting to run high res wide screen resolutions, though.

16-September-05, 10:32 PM		#6 (permalink)
Hibiki Apex Tech Maniac Supreme	According to Penstarsys.com (http://www.penstarsys.com/#xfire_sil) the limitation is just the bandwith of the connection between the two cards. The image on the screen will be based on the GPU of the master card.