Been using R9 270X ( core 1100MHz, memory 4Gb, clock memory 1400MHz, 2 monitors. all is default on settings) and it crashes like a piece of a cardboard unable to run any simple game. ALL THE TIME !!
For some reason after update to AMD Radeon crimson has gone only downhill. Used to have overclock on it but went to default settings after crashes became too frequent.
If you need some info about the PC just ask below