Vega in 2018

One of the more disappointing elements to the roadmap announcements at AMD’s Tech Day was about graphics, and specifically Vega. To put it bluntly, there are no updates from AMD coming to the consumer desktop graphics market in 2018. With everything going on regarding the cycle of GPU architectures, and the insatiable demand for AMD graphics cards from cryptocurrency miners driving prices sky-high, the enthusiast and high-end gamers are getting the thin-end of the wedge.

Unfortunately, AMD is getting the blame for this, with many gamers blindly demanding ‘why not make more?’. In a recent earnings call, AMD CEO Lisa Su that they are making as many Vega graphics processors as possible, and also increasing their order with the fabs to produce more. Dr. Su put the problems with production squarely in the hands of the DRAM manufacturers, stating that memory supplies (GDDR5 and HBM2) are not sufficient to meet the high demand from everyone that needs them, which is also driving up cost. As a result, AMD isn’t blaming itself for the lack of GPUs being made available to consumers, but is saying that Samsung, Micron, and SK Hynix are not producing enough. AMD seem to be selling as many GPUs as they can make, which is good for their balance sheet at least.

So while there is nothing to look forward to on the desktop graphics side, AMD did mark on its roadmap two specific graphics products for 2018.

Vega Mobile, with HBM2

The graphics strategy in notebooks is bifurcated for AMD. On one side, their Mobile APU business takes care of the low-end of the market. The recent business relationship with Intel to sell graphics chips for Intel’s high-end mobile processors means AMD has a business on that side. The big hole in the middle is for notebook customers that want discrete graphics. After a couple of years of large Polaris based designs using GDDR, AMD is bringing Vega to this market.

As far as AMD were prepared to announce, a single Vega Mobile design is being prepared, which might be subject to binning based on compute units. The full amount of compute units in the chip has not been made publicly available, however it measures basically half of the full Vega 64 chip next to it. This would normally suggest a 32 CU chip, however there are a number of front-end elements required which have a fixed size – compared to the Intel 24 CU chip for the Intel with Radeon Graphics processor, this chip seems to be of similar size, if not bigger.

What we do know about the Vega Mobile processor is that it is paired with 4GB of HBM2, using an embedded interposer to give an overall z-height of 1.7mm. This is AMD’s second or third generation of interposer technology, and it has come a long way since Fiji: the interposer is tight along the dimensions of the GPU and HBM, but it is also embedded into the PCB. The embedding allows it to reduce the height, making it a better fit for ‘thin and light’ mobile platforms. The interesting correlation here is that at 1.7mm, it matches Intel’s EMIB implementation which is also 1.7mm. This caused two theories: either AMD is using EMIB (it isn’t), or it means that the perceived z-height benefit from using EMIB might not exist. The latter is true: AMD has unequivocally confirmed that it is using an interposer, and does not have access to Intel’s EMIB.

Ultimately AMD created more questions and answers with this announcement. Nothing was said regarding power, price, expected CPU/GPU combinations, or which notebook partners they have ready to use it. The only element to the discussion was that the chip will enable VR-capable notebooks, support HDMI 2.1 variable refresh rates, and will be coming in 2018. (Not to be all Maudlin, but watch out for the GPU manufacturer that puts three on a graphics card and sells it to miners.)

AMD Sampling 7nm Vega in Q4 2018

In previous roadmaps, AMD stated that it would be using a 14+/12nm process node for an update to its Vega design. At the Tech Day, that part of the roadmap no longer existed, and in its place was the announcement of a 7nm Vega graphics processor to be sampled at the end of the year.

This announcement came with a lot of questions, specifically whether 7nm would be ready for Q4 2018. AMD clarified its remarks by saying that this product will not be aimed at gamers, but will be a version of Vega specifically for machine learning, and they expect only to be sampling select customers with early silicon at the time.

This slide above lays most of it out: the design will be an optimized version of Vega, which means it might not look much like a Vega GPU as we know it. AMD is planning that this product is used both for training and inference, with a focus on new deep learning operations – specifically aimed at HPC clusters. AMD also cites a new high-speed IO in play, which might be a version of Infinity Fabric designed to compete with NVLink, as well as virtualization support.

With 7nm in its infancy, we highly expect it to be a small bit of silicon, something akin to the current Radeon Instinct MI8. By using small silicon in a high margin market, this will allow AMD to optimize the design plans for its other 7nm products. This is what Ryan called a ‘pipe-cleaner’ processor, and it makes sense for semiconductor fabs to focus on smaller processors to start with, as these will yield at higher rates.

With a planned sampling in Q4 2018, we might expect volume production to be nearer Q2 2019. This means that the next generation of consumer-focused graphics, perhaps using the newer Navi architecture, will be in the mid-2019 timeframe. According to AMD’s roadmaps, it is committed to demonstrating Vega on 7nm, Navi on 7nm, and a ‘next-gen’ design on 7+ before the end of 2020. Obviously there was no clarification on whether that final design is consumer or enterprise focused for 2020. In our recent interview with AMD’s CEO, when asked if the GPU market will at some point have to bifurcate between gaming focused and compute focused designs, Dr. Lisa Su stated that ‘it must be the case’.

Updates on AMD and RTG

At the time of the event, AMD was in technical limbo, with former Radeon Technology Group leader Raja Koduri leaving for Intel. Since the event (i.e. between the event and the time this is published), AMD has reimagined the role and hired two people to fill it: Mike Rayfield will head up the business side of RTG, while David Yang, who used to work for AMD on GPUs, is rehired to take control of the technology side of RTG.

You can read our analysis of these hirings here.

Zen+ Cores: 2nd Generation Ryzen, ThreadRipper, GlobalFoundries 12LP, and X470


View All Comments

  • jjj - Monday, January 8, 2018 - link

    Nor quite. Vega on 7nm is a SKU aimed at machine learning that samples in late 2018. That means volume in 2019 and other SKUs later , if there are other SKUs- I am unclear if AMD stated that there are other SKUs or that's an AT assumption.
    There is a possibility that Navi hits high end in 2019 and Vega lives bellow but that's kinda silly as AMD needs to be in a huge rush to replace Vega with something that is more competitive.
  • haukionkannel - Monday, January 8, 2018 - link

    True. The machine learning chips Are the top priority I was just quessing that mobile part would Also get upgrade. My bad...
    So next Vega goes against machine learning Volta. Maybe Nvidia neither will release normal Volta, only those calculate monsters to AI projects. That would be interesting.
  • jjj - Wednesday, January 10, 2018 - link

    Vega 7nm is 2019 for volumes it seem, Volta V100 will be replaced by something new likely this year and again in 2019- at the very least there will be one update.
    What Nvidia will do in consumer is unclear as there is no pressure on them to spend on releasing new things. The Intel+AMD part is problematic in laptop so likely they'll address that segment soon with something new.
  • Pinn - Monday, January 8, 2018 - link

    Lisa is my waifu. I'm fine with my wife and daughter reading this. Reply
  • StevoLincolnite - Monday, January 8, 2018 - link

    Ugh. No Navi until 2019. So AMD's graphics are guaranteed to be terrible for another year. Reply
  • Pinn - Monday, January 8, 2018 - link

    and nvidia is guaranteed not to release volta for consumers.. fun. Reply
  • Xajel - Monday, January 8, 2018 - link

    I was really hoping for a low power 8C/16T Ryzen CPU's, these can be used in SFF & laptops with dGPU already... these will be for those who want more CPU performance than GPU, or they need both CPU & GPU power. Reply
  • A5 - Monday, January 8, 2018 - link

    You'll probably have to wait for 7nm for that. Current thermal budgets in laptop designs just aren't going to get you usable 16T performance from 35-45W. Reply
  • neblogai - Monday, January 8, 2018 - link

    Table of Ryzen Mobile CPUs has all Raven Ridge APUs with '1MB per core'. But this is not true for R3 2200U, which still has the same 4MB of L3:
    Also- I still hope that is a Banded Kestrel die. On that topic, Joe Macri, when asked about RR use for fanless designs back in October, said it would not work too well, and would have to be clocked real low; when asked if they are building a different chip for that fanless market- answered only broadly- 'we love PCs,.. we want you to find AMD everywhere where PC is'. So I'm not sure- does that still mean only Stoney Ridge (if it qualifies for fanless), or a new die. Just looking at the AMD's below average power efficiency in RR laptops at browsing and playing video- maybe AMD knew they are simply not ready for fanless, and need to put in more work. But I still wish they released Zen 2C/4T 3CU - if not low power- then at least for even cheaper normal laptops. After all- Raven Ridge is not very small die at 210mm2, and a very cheap ~110mm2 die with 2c/4t Zen could also be successful.
  • T1beriu - Monday, January 8, 2018 - link

    ^This. Reply

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