- Nov 7, 2018
Stupid question: what if AMD just shrink's Vega 56 to 7nm but change it enough have IF, just like the latest Instinct family cards, and have that placed on the CPU, HBM2 included?For me, the really big question is whether AMD has the packaging capacity and low cost to take chiplet design into the mainstream. If so, then we'll see reuse of their 7nm CPU chiplet for the Ryzen 3000 series. They only need a mini IO chiplet.
What is the easiest way for AMD to create this IO chiplet? They already have Raven Ridge. It has the dual-channel memory controllers and IO needed. Just rip out the 4-core CCX and replace it with some external IF ports to connect the CPU chiplet. Except for that, and some adjustment to the layout, no redesign is needed. With this seemingly simple solution, Ryzen 3000 would come with a powerful iGPU as well, thus match Intel's feature set and increase sales with OEMs.
Drivers for this thing would be mostly based on Raven Ridge and ready to go.
Would it fit on the package? 14LP Raven Ridge sans CCX is 166 mm² (210 - 44). With the announced 15% density improvement for 12LP we get 144 mm², so let's say 150 mm² for good measure.
The idea was to have a CPU chiplet + an IO chiplet + Vega-like 7nm full chip and have the whole thing work as an APU.
Is it @ all possible?
Due to power constraints, it would most likely require quite a slimmed down version of Vega 7nm chip, but still a full chip: thinking along the lines of a RX460 Polaris level of performance perhaps, but on a Vega design.