So this is my question...

I've read somewhere people posting hardware that works good together and what doesn't.. does it really matter?

I have a 70 euro mobo and cpu (F2 A55-M LE and the cheapest amd cpu out there) combo with two R9 290x doing 740 stable kh each. Now I'm waiting for two R9 290 and I'm wondering what board should I get.. I'm thinkinh about buying the same combo... but also I think my R9 280x could get like 770 kh and no idea if its board related...

would enjoy some input and opinions about this

thanks