This is not what Mercury reports. They are showing the last 5 quarters from a volume perspective (units). They dont add the numbers from the last four quarters and divide them...
AMD sent it to the press via e-mail. It is an official statement from them.
The mercury report says the following:
Mercury Research is
reporting the shares as a four-quarter volume-weighted average to smooth
the noise of seasonal inventory cycles and reveal ongoing share trends.
Additional details are available in the full report supplied
to clients last
week.
You are getting confused - its a 4 quarter average in that document,ie,they took the last four quarters and made a weighted average. So what you do is you add the last 4 quarters,and make a weight average.
The report is looking at the average increase over a year,not quarter to quarter shipping changes.
That means it includes last year,when AMD had some pretty bad quarters with the Maxwell releases.
There is more information in the rest of the report and the other figure is the change from last quarter to this quarter in shipping figures.
Plus,there is no indication this is a press release as HardOCP does not say it is one - it means either HardOCP has a subscription or were sent it from Mercury Research.
Its not even stated in the HardOCP article and AMD publishes all its PR releases on the website.