Heh

Im gonna rewire it anyways

TX750M comes with

1 x ATX (motherboard)
1 x EPS (CPU)
1 x floppy connector (useless)
7 x molex (on 2 rails)
4 x PCIe (on 2 rails)
8 x SATA (on 2 rails)

400W EVGA has:

2 x PCIe
2 x molex

TX750M will be the "master" PSU and the EVGA the "slave" PSU. All the basic (non GPU/riser) components will be hooked up to the master:

1060's are powered by a single 6-pin connector. They draw about 61W along the PCIe and 60W along the riser (http://www.tomshardware.com/reviews/nvidia-geforce-gtx-1060-pascal,4679-6.html). This means im capable of powering 2 cards or 2 risers from a single (8-pin) PCIe power connector (max 150W per 8-pin PCIe).

So using the TX750M, split PCIe #1 to power card #1 and #2. Split PCIe #2 to power riser #1 and #2.

Then split PCIe #3 to power card #3 and #4. Split PCIe #4 to power riser #3 and #4.

So all total, mobo/CPU/SSD, 4 cards and their corresponding risers are powered via the TX750M. At full power, the cards will draw 4 x 121W, plus the other components (~85W ish) = 570W. Fantastic, because a PSU runs optimally at 80% load (750W * 0.80 = 600W) which you are very close to.

Now that leaves the EVGA 400W.

Using the EVGA 400W,  split PCIe #1 to power card #5 and #6. You then split PCIe #2 to power riser #5 and #6.

So all total, that PSU is drawing 2 x 121W = 242W.

Good to go?