780 SLI or 7990 CFX for 6 or 8 monitors

[myomonitorz]

Hi

Need some help with SLI or CFX for 6 to 8 monitors at 2560x1440 each or 7680x2880 (with 6 monitors) or 10240x2880 (with 8 monitors.)

The system is ...

ASUS P9X79E WS
3930k
64G 2133
2x256 SSD
Corsair 1200

Currently, I am using an AMD W600 but would like better performance. I have already tried 770 2G quad and 7950 3G quad, and neither is sufficient. The 4th card actually reduces performance from 3 ways in either SLI or CFX when bench-marking with 1 monitor only.

With SLI or CFX, a couple MSTs can run 6 monitors but not 8. And if I just connect the monitors to individual cards, then I am not taking advantage of the SLI or CFX capabilities.

2 or 3 780s vs 7990s is still around $1000 cheaper than a single W9000.

Thanks in advance for your help.

 

[toddybody]

In nearly all situations, 2x7990's in quad CFX will crush dual 780s. Not sure what ROI you get with a third 780 though.
IIRC, AMD recently released a fix for their long suffering Frame Latency issues...cant validate personally though.

 

[8350rocks]

In nearly all situations, 2x7990's in quad CFX will crush dual 780s. Not sure what ROI you get with a third 780 though.
IIRC, AMD recently released a fix for their long suffering Frame Latency issues...cant validate personally though.

Yes, they did with frame pacing.

2x7990's = 4x7970 GHz.

2x7990s > 2x780s

 

[endeavour37a]

If you could wait 2 months AMD is said to be launching their Hawaii cards 8000 series I guess, hear they are very good, Nvidia will release the 790 (2xGK110) about the same time to compete or maybe unlocked GK110 in Titan Ultra.