Connecting 2 gpus p55ud3 motherboard.

[Yuvalco809]

hi, i am looking to connect 2 gpus into my motherboard, how do i connect the second gpu? is it possible with the p55ud3 , i think it is but not 100% sure,in the gpu specs i need pci x16 slot.
in the motherboard specs (http://www.gigabyte.com/products/product-page.aspx?pid=3439#sp) it says 1 pci 16 slot for expansion but says its supports Multi-Graphics Technology. tried to connect my gpu to the other slot and it worked, at the moment i have only 1 gpu, so cant really test it.
also how can i know if my psu will support it in terms of power? , its 750w , got 4890 ati card planing on adding r3 250 ati card, and has i5 750 cpu.
and one last thing how exactly i plug in the second gpu into the psu?
(i am adding another card without Crossfire just for the purpose of connecting 3 monitors setup)
thanks in advance and sorry for my english.

 

[maugusto]

thing is you can't use the 4890 in pair with one R7 250, they are diferent cards.
for dual GPUS (crossfire or SLI) the cards must be the same specifications (the brand may vary and the amount of memory too, but the architecture (the GPU itself) must be the same)
to work you will need 2x R7 250 or 2x 4890

and one more thing, with that motherboard with one PCI-e at 16x and the second at 4x the performance will be bad

 

[Yuvalco809]

I am not looking for crossfire. just to connect 3 monitors, 2 with 4890 card and one with r5 230 card.

 

[maugusto]

that does not make any sense
two monitors on 1 gpu is going to behave exactly like two monitors on 2 gpus + your windows will be a bit slower with the 2 independent gpus

 

[Yuvalco809]

I have got 3 monitors. 4890 card can support 2. I want to connect all 3 without buying and expensive card... its not for preformance. I dont play any games maybe just runescape. Its for productivity.

 

[maugusto]

haaa, so you have a reference 4890 with 2x dvi, in that case you can put the R7 250 with no problems

 

[Yuvalco809]

Why do u keep saying r7 250 lol its r5 230. And the 4890 has hdmi dvi and dp.
Are u sure that the motherboard and the psu will support both?

 

[maugusto]

on the first post you said r3 250, and that does not exist, so i assumed it was an R7 250

"got 4890 ati card planing on adding r3 250 ati card, and has i5 750 cpu."

and yes the mb and psu will handle the cards

 

[Yuvalco809]

Yea i was wrong in the first post.
Well thank you very much you helped me a lot.

 

[Yuvalco809]

There is an option that the psu has no connection for second card? I am not home right now to check.

 

[maugusto]

r5 230 does not require external power