This means it should be more powerful than R7 250X and HD 7770 on theoretical spec, assuming that it doesn't throttle by the temperature.Īs for M390, AMD doesn't list such a part in their site, but judging by the spec of M385X and M390X, it has a high chance to be a rebrand of M290X (1280 shader cores + 256-bit GDDR5 I/F). M380 has 640 shader cores per AMD's site, with up to 96GB/s of memory bandwidth from an 128-bit GDDR5 interface. It seems I am a bit late, but you can take reference to the desktop counterparts.