Mobility Geforce GTX 870M Chip Exposed – 6GB and Different Codename, Are we looking at Maxwell?

Mobility Geforce GTX 870M Chip Exposed – 6GB and Different Codename, Are we looking at Maxwell?

I have something very interesting today. The following pictures of the
MXM GTX 870M and a GPUZ shot were sent to me by my source. You can see
the core codename in the first picture, which, interestingly the does
not match anything we know
before. Also it is not present in the Techpowerup database. However the
chip is undoubtedly an 870M. So what exactly are we looking at?

Geforce GTX 870M Die Shot and GPU-Z Leaked – 6GB VRam and Different Codename

Let me state for the record that I am not calling it yet. I will give the reasons later but for the moment I am leaving
the decision whether or not we are looking at Maxwell up to the
readers. Now let me provide you with what we already know. As you may
recall, CLEVO slides
were leaked two months back that showed the entire lineup as ‘Maxwell’
along with the codenames of the die. However just soon after another
leak confirmed the GTX 880M as nothing more than a re branded Kepler GTX 780M. During this time details of the GTX 870M came to light. One of the important things was that the GTX 870M was going to have 3GB vRAM and not 6GB as the slides had originally said, something which the Techpowerup database
confirmed. Also the codename mentioned for the GTX 870M was
“N15P-GT-A2″. Remember this. Now observe the picture above and GPUZ
screenshot below.

GTX 870M Maxwell Mobility GPU Z Screen 

Now as you can probably see, there are two glaring contradictions to the previously confirmed specs. One, the codename is not
N15P-GT-A2, its N15E-GT-A2. Secondly the vRAM is not 3GB, its 6GB just
as the original leak had predicted. There is also one more major hint,
the 870M is present and defined in the Techpowerup database, but we can clearly see that the latest version
is not properly recognizing the chip at all. It should be able to tell
not only the process but the die size, transistor and direct x support
as well. You would also be interested to know that the N15E codename was
reserved only for the 880M flagship GPU in the original CLEVO slides.

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