https://www.techpowerup.com/268747/amd-renoir-die-annotation-raises-hopes-of-desktop-chips-featuring-x16-peg
 
VLSI engineer Fritzchens Fritz, famous for high-detail EM photography of silicon dies and annotations of them, recently published his work on AMD's 7 nm "Renoir" APU silicon. His die-shots were annotated by Nemez aka GPUsAreMagic. The floor-plan of the silicon shows that the CPU component finally dwarfs the iGPU component, thanks to double the CPU cores over the previous-gen "Picasso" silicon, spread over two CCXs (compute complexes). The CCX on "Renoir" is visibly smaller than the one on the "Zen 2" CCDs found in "Matisse" and "Rome" MCMs, as the L3 cache is smaller, at 4 MB compared to 16 MB. Being MCMs with disintegrated memory controllers, it makes more sense for CCDs to have more last-level cache per CCX.

We also see that the iGPU features no more than 8 "Vega" NGCUs, so there's no scope for "Renoir" based desktop APUs to feature >512 stream processors. AMD attempted to compensate for the NGCU deficit by dialing up engine clocks of the iGPU by over 40% compared to those on "Picasso." What caught our eye in the annotation is the PCI-Express physical layer. Apparently the die indeed has 20 PCI-Express lanes besides an additional 4 lanes that can be configured as two SATA 6 Gbps ports thanks to SerDes flexibility.
 
This would mean that "Renoir" can finally spare 16 lanes toward PEG (PCI-Express graphics, or the main x16 slot on your motherboard), besides 4 lanes toward the chipset-bus, and the final four lanes allocated to the M.2 NVMe slot that's wired to the AM4 socket, on a typical desktop platform. On the mobile platforms, "Renoir" processors spare no more than 8 lanes toward PEG (discrete graphics), including when paired with discrete GPUs such as the GeForce RTX 2060 (mobile), which is capable of gen 3.0 x16. Previous generation desktop APUs such as "Picasso" and "Raven Ridge" spare no more than 8 PCIe gen 3.0 lanes toward PEG, even on the desktop platform. x16 PEG capability would bolster the credentials of desktop "Renoir" processors for premium gaming PC builds, using some of the top SKUs such as the Ryzen 7 4700G.
 
Looks like a really good design which should give much higher performance in my opinion. 
 

It's 8, he just broke down the core's internals in that one shot

sort of defeats the purpose of NUC device chip
 
you build said chip to bring power down and allow portable devices like a clip on the belt NUC  that only eats like 15W
 
now you want to put a 400 watt PCIe graphic card with it????
LOL
 
Lets strap on the gas powered Leaf-blower converted to a power gen on your back or a Backpack with lithium Ion batteries and hope they don't explode on you
 
i see the sense of that x16 slot seem useless
 
if you want to use that for something else like a capture card or other device i can see that