HELP [6 7950 dual PSU set up question]

I know this sort of question probably comes up a lot, but here goes anyway

I've got 6 sapphire 7950's, a 1000W corsair 80 plus PSU and another 750W corsair 80 plus. The PSU's are connected together using a dual PSU power supply adapter and then into the motherboard.
Was just wondering if its ok to have 3 of the cards 2x6pin PCI power connected to the 750W PSU with the 3 powered risers on one peripheral cable with 3 molex connectors on it also connected to the same PSU.
Then on the 1000W PSU the motherboard, ssd, fan, the 3 other GPU's 2x6pin PCI power and their 3 x powered risers.
Also should I connect the 8pin CPU from the 1000W also?
I know I probably don't need 6 powered risers but that's what I've got.

Could anyone point me in the right direction or let me know what I'm getting wrong. I don't mind sending a little coin to someone that can help me out a lot.
Thanks in advance