6 x 7990's using ASUS BTC mining motherboard WPA2

[royce]

The main hashcat page lists statistics for 7970, so double that for 7990s:

http://hashcat.net/oclhashcat/ (search for 'wpa2')

So if you can get all 6 working, I would guess 142 kh/s x 12 = 1.7 Mh/s for WPA2.

This may also be helpful:

http://hashcat.net/forum/thread-2404.html