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Archive for May, 2015

What’s inside new rMBP ?

Found a screenshot of new rMBP with amd card inside:

Device-id is 6821, looking at it’s closest brother 6820 – https://pci-ids.ucw.cz/read/PC/1002/6820

It’s mobile variant of cape verde chip that’s found in radeon hd 7770.
640 shaders, 16 ROPs, 40 TMUs, 128-bit bus.

And, just x8 pcie ?

Well, x8 pcie 3.0 would be equal to x16 pcie 2.0, but why?

The cpu has total of 16 pcie 3.0 lanes, x8 to gpu, two of x4 to TB controllers?

gtx 750ti is much faster than hd7770, cosuming less power, if only apple would include gm107 into new rmbps…