It is possible to crossfire two R7 250's but, you would then lose your dual graphics abilities and there's no possible way to run them all in a three way crossfire/Dual graphics configuration. There would be a fairly substantial gain from crossfiring two R7 250's in comparison to your dual graphics set-up but, if you're considering that instead, I would recommend you spending another extra $20-40 and buy a more potent graphics solution like an R9 270(x) which, would vastly out perform dual R7 250's and also, eliminate the compatibility problems that tend to coincide with doing so as well. After selling the R7 250, the cost would be roughly be same overall as the cost of one R7 250.
If there's anything else I can answer for you, feel free to ask.
Wow thanks for fast reply since u offered, I do have another question I could use help with. I had various problems when ordering a cpu cooler, picked 4 before I got one that didn't sell out before I ccould buy it or was 2 weeks behind cause of shipping location. Anyway I got the cooler master hyper tx3 and did not install it because it's AM3 socket, currently using stock heatsink :/ I have been reading it's compatible with my fm2+ cpu and I could have been using it the whole time. Kinda concerned the contract plate won't match though. Do you know if they are truly compatible??
AM2, AM2+, AM3, AM3+, FM1, FM2, FM2+, LGA1150, LGA1155, LGA1156, LGA775
17.0 - 35.0 dbA
800 - 2800 RPM
As you can see above, yes! It is in fact compatible and you shouldn't encounter any issues in regards to establishing proper contact. Just make sure to properly apply your thermal interface material/compound and monitor your temperatures to ensure they're within the optimal thermal range as well as maintaining them. Aside from that you should be good to go.
Have a great weekend and feel free to contact me if you ever require assistance again.
Man I don't know where u found that, thank you!!
Never a problem, always glad to help. Have a great weekend and enjoy your new cooler.