October 16, 2014
M290X is radeon HD 7870 but at lower 900 mhz core clock. A bit slower than 780M you can find in current Imac.
and it comes with 2 gigs of vram, kidding?
M295X is some tonga chip, probably full tonga chip ( equal to 7970). Will be like one D700 of newMacPro.
4 gig vram here.
That’s too weak to play anything at 5K, they even will struggle at 2560×1440. Only for 1080p gaming.