How to properly power the third card with the second PSU?

Question

Do it yourself

hello.
I ask for help and advice.
there is a Foxconn F750-85 750W power supply that powers the processor (core 2 duo e 6300), a mother, a screw and two R9 280x
there is an INWIN POWER MAN IP-S350T7-0 power supply, with which I want to power the third R9 280
there is also an adapter 6 pin to 8 pin and 2 molex to 6 pin. both are needed because INWIN has only one 6-pin connector and 2 molexes.
will it be enough to connect 2 green wires from 2 PSUs if I want to power a third video card from INWIN PSU?
Or is it still better to connect the black and yellow wires from two PSUs anyway?
and do I need an additional load on the INWIN PSU so that there is no "skew"?

BP photo

Answer 1

Connect only black ones, from connecting yellow ones there will be broads (I exaggerate because of different wahs and skew lines, the entire load will go to one bp and it will go into overload, after that the entire load will go to the second one and it will also go into overload).

Answer 2

Prepare a fire extinguisher or buy a power supply of the required power.

Answer 3

e6300 and R9. And two R9s?!
For what tasks is the machine? Well, it's definitely not a game. For multi-monitor it seems like an overkill. So GPGPU remains. So what, do you think it makes sense to use any 250-watt trash for work?
The R9 280x has a stock TDP of 250W. If you fence the collective farm, then exactly the opposite - both video cards on one PSU, the rest of the small things - on the other. But if this 700-watt foxconn of yours is minimally decent and can withstand its rated power, then it will be enough for the eyes for the entire system.
Regarding the directions of digging for the construction of the collective farm - continue from here: forums.overclockers.ru/viewtopic.php?t=14083
Oh, hell, the third R9? Then yes, 700 watts is not enough anymore. Will this 250W inwin be enough for a separate video card - I have big doubts.

Answer 4

Purely technically, nothing complicated at all. we connect one power supply unit normally and the second one, which will be minimally turned on by hands from the button on the ass, to the dedicated video card. You will need to install a jumper in the 24-pin connector of the power supply by connecting the black and green wires on the left next to the lock with a latch. With this jumper, the power supply will output power as soon as it is turned on.

Answer 5

I installed a 5 volt relay. his contacts, the inclusion of the second bp controlled both galvanic isolation and synchronous (almost) start. In your case, I would leave 250 for the mother and screws, and 750 for video cards.

Answer 6

www.add2psu.com
Here is such a thing.