Starglider

OpenCL with quad watercooled Radeon 7990s

Discussion created by Starglider on Oct 10, 2012
Latest reply on Nov 13, 2012 by hsaigol

The cards finally arrived:

 

dual-tahiti-cards.jpg

 

These are the 'workstation edition' of the Powercolor 7990 Devil13; to the best of my knowledge we are the only customer to have these. Currently testing them with the original air coolers prior to fitting the custom nickel-copper waterblocks and integrating them all into the same machine;

 

dual-tahiti-testing.jpg

 

Host machine has dual overclocked 8-core Xeons, 128 GB DDR3, quad SSDs, 10gig ethernet, dual PSUs, quad triple-fan radiators etc. I can happily confirm that the 'impossible to disable crossfire on dual-GPU cards' bug that made the 5970 and 6990 unusable for GPGPU has been fixed for the 7990; there was lots of flickering and Catalyst Control Center crashed when we disabled CrossfireX, but after opening it up again CrossfireX was finally disabled and so far dual-device tests are working fine. Will be running 8-GPU scaling and overclocking tests next week; if it works well then we will make this spec our standard developer workstation for the next project.

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