Main concept for 2x7990 system

[KT819GM]

By kt819gm at 2012-03-09

But this is 2x6990 as this 80EU MB have only 2x pciex slots (1x-16x 1x-1x). Ant these running stable without a single glitch @20W/mb (HD6990 is other story). BUT - it's bruteforcing, so no demand on bus speed, cpu and else.