A recent post from a user on Reddit that has bought the new 15-inch MacBook Pro Retina, finally shed some light on the Radeon R9 M370X graphics card, which is based on a three-year old Cape Verde GPU.
Back when Apple announced its new 15-inch MacBook Pro Retina and has switched from Nvidia's GT 750M Mac Edition graphics card to AMD's Radeon R9 M370X, we did not have any precise details regarding the GPU, other than Apple's "up to 80 percent faster" description.
A post on Reddit has now revealed that the Radeon R9 M370X has the same DeviceID as a three-year old Cape Verde GPU, which originally launched with the Radeon HD 7700 series. As you already know, AMD's Cape Verde GPU is based on GCN 1.0 architecture, packs 640 Stream Processors, 16 ROPs, works at 800MHz for the GPU and comes with 2GB of 4.5GHz clocked GDDR5 memory paired up with a 128-bit memory interface.