On 05/31/2012 12:43 AM, Jussi Silvennoinen wrote:
> As far as I know, ATI cards can only drive more than two displays if
> you're using pure DisplayPort protocol. Using passive DP->DVI adapters
> you can only drive two monitors.
ATI cards (in my case a 5770) are fine driving one monitor via an active
DisplayPort->DVI adapter and two more by DVI directly for a total of
three. It's the configuration I am running right now.
I wound up going with the ATI FirePro v4900 for triple head on RHEL6.
I am using the DVI port, and two DisplayPort to DVI cables to drive
three monitors.
An interesting note... The AMD binary driver locked up the machine.
Using the native RHEL driver, all three screens work, and I get
accelerated X and compiz works great.
Out of curiosity, what kind of performance do you get? In something
rudimentary like glxgears.
Sorry for the delay in answering, I was travelling all week. It's not
spectacular, but certainly usable for my purposes. Like I said, I am not
a gamer, all I wanted was compiz to work on three heads. I just got:
[tcameron@case ~]$ glxgears
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
298 frames in 5.0 seconds = 59.561 FPS
300 frames in 5.0 seconds = 59.903 FPS
TC
--
Thomas Cameron, RHCA, RHCSS, RHCDS, RHCVA, RHCX
Chief Architect, Canada and Central US
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