Looking to buy new GPU(s)

Zuul

Honorable
Sep 24, 2013
122
0
10,710
Hello guys!

I am looking to buy a new GPU or GPU(s) for my system. However I am looking for help and what to upgrade and price.
Let me start with posting my specs at this moment.

corsair 750D being deliverd at the moment.
Asus P8Z77-V LX motherboard (looking to upgrade if I go crossfire cards since it only supports crossfire in 16x 4x and no SLI at all)
GPU: sapphire 7850 2gb (card I want to change)
Corsair RM850 watt (just got this should be enough juice to power 2 cards.)
8 GB corsair vengeance 1600
i7-2600k cpu (not looking to change the cpu since it works just fine altho not much room to overclock it)
corsair H80i cpu cooler

Now I am debating on getting a strong single card gpu or get 2 in crossfire/sli and upgrade the motherboard aswell.

My budget is around 700 euros.
Thanks for the help!

EDIT: also I am willing to exceed the 700 euros limit a bit if a new motherboard is in order for crossfire/sli would like some more info about a decent LGA socket 1155 motherboard aswell since I have an i7-2600k
 

Zuul

Honorable
Sep 24, 2013
122
0
10,710
I've fixed my eyes on a gigabyte z77x-up7 since its only 100 euros and has the crossfire and sli support that I want. for gpus I guess 2x 280x would work? would prefer 2 r9 280x toxics to go with it but I don't know if 850 watt will be enough since sapphire recommends 1000 watt!