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Iris Plus and MX250 could be in trouble: AMD Ryzen 4000 Renoir Zen 2 APUs touted have a Ryzen 9 variant, expected to sport Vega 12 and Vega 15 iGPUs

AMD Renoir Ryzen 4000 Zen 2 APUs could sport Vega 12 and Vega 15 iGPUs. (Source: The Inquirer)
AMD Renoir Ryzen 4000 Zen 2 APUs could sport Vega 12 and Vega 15 iGPUs. (Source: The Inquirer)
AMD's upcoming Renoir Zen2 APUs could feature a Vega 12 iGPU, according to information from Komachi. Since the 7nm node affords accommodation of more cores, it is also being speculated that a Vega 15 iGPU is also highly probable. We don't know much about these upcoming APUs, but a proper memory implementation could seen them further widening the gap with the Iris Plus Graphics G7 and the NVIDIA GeForce MX250.

We had earlier speculated that AMD would be launching the Ryzen 4000 'Renoir' Zen 2 APUs sometime in November. While it looks like we might have to wait till CES 2020 for the new APUs, information about the Vega iGPU has been trickling down steadily. The latest info we are seeing is that a Vega 12 (and possibly Vega 15) iGPU could be on the cards. 

The information comes via famed leakster Komachi on Twitter who has identified several Renoir listings with B12 in the nomenclature indicating a 12 CU (Compute Units) iGPU. This makes sense because the 7nm process can allow for more cores to be accommodated on the die. Do note that the CPU core counts of the Renoir APUs are still elusive. 

While Vega 12 is definitely a possibility, hardware enthusiast Locuza feels that a Vega 13 or even a Vega 15 configuration is also possible. Comparing the Vega CUs and their caches, Locuza speculates that Vega 13, if it exists, could have a 3+3+3+3+1 CU configuration with each CU cluster getting 32 KB L1 instruction cache (L$) and 16 KB K$ (constant cache) or a more probable 3+3+3+2+2 config. This also implies that we might get to see a Vega 15 with a 3+3+3+3+3 configuration as well. 

The 7nm Renoir APUs present an interesting paradigm. For one, it looks like AMD will continue to use Vega and reserve Navi iGPUs for Zen 2+ instead. This is to be expected as AMD would not have had the luxury of taping out 7nm Navi in time for Zen 2 Renoir. Another interesting possibility is that Renoir APUs can further widen the performance gap with the Intel Ice Lake Iris Plus G7 and also eclipse the NVIDIA GeForce MX250, but that depends a lot on the memory implementation and the available bandwidth. 

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AMD Ryzen 4000 Renoir variants. (Source: Komachi on Twitter)
AMD Ryzen 4000 Renoir variants. (Source: Komachi on Twitter)
Possible CU clusters on upcoming AMD Ryzen 4000 APUs. (Souce: Locuza on Twitter)
Possible CU clusters on upcoming AMD Ryzen 4000 APUs. (Souce: Locuza on Twitter)
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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2019 11 > Iris Plus and MX250 could be in trouble: AMD Ryzen 4000 Renoir Zen 2 APUs touted have a Ryzen 9 variant, expected to sport Vega 12 and Vega 15 iGPUs
Vaidyanathan Subramaniam, 2019-11-11 (Update: 2019-11-11)
Vaidyanathan Subramaniam
Vaidyanathan Subramaniam - News Editor
I am a cell and molecular biologist and computers have been an integral part of my life ever since I laid my hands on my first PC which was based on an Intel Celeron 266 MHz processor, 16 MB RAM and a modest 2 GB hard disk. Since then, I’ve seen my passion for technology evolve with the times. From traditional floppy based storage and running DOS commands for every other task, to the connected cloud and shared social experiences we take for granted today, I consider myself fortunate to have witnessed a sea change in the technology landscape. I honestly feel that the best is yet to come, when things like AI and cloud computing mature further. When I am not out finding the next big cure for cancer, I read and write about a lot of technology related stuff or go about ripping and re-assembling PCs and laptops.