Ryzen APU Overclocking: A Focus on Memory Support

Also part of the demonstration about the new APUs was overclocking. For a number of years, AMD has hired Sami Makkinen, a well-known former world-record holder in various overclocking categories, to help tune the overclocking on some of its processors. So despite this being an integrated graphics platform, Sami was on hand to show the day-to-day overclocking potential. I was told that liquid nitrogen overclocking might be held at a later date…

Nonetheless, we were shown the system that would be distributed to reviewers for launch day: a mini-ITX motherboard, a Ryzen 5 2400G processor, 2x8 GB of DDR4 memory, and an AMD Wraith cooler. Using the popular benchmarking tool 3DMark Fire Strike, Sami showed a 39% increase over stock performance by overclocking only the memory and the integrated graphics:

  • DDR4-2400 + 1250 MHz GPU: 2911 Points - 'stock'
  • DDR4-3200 + 1250 MHz GPU: 3322 Points (+14%)
  • DDR4-3200 + 1550 MHz GPU: 3596 Points (+24%)
  • DDR4-3600 + 1675 MHz GPU: 4048 Points (+39%)

This shows a couple of interesting data points. First, that the DRAM speed directly influences the results a lot: the 14% gain moving to DDR4-3200 and a similar gain again up to DDR-3600 means that we are still dealing with a graphics system that is memory bandwidth limited, even with only 11 compute units. The Infinity Fabric communication pathways are tied to the DRAM speed, so these would also get a speed up – when asked if it would be possible to discern how much of the speedup is due to a pure DRAM improvement and how much from the Infinity Fabric boost, I was told that AMD could do it in house, but it would be impossible for consumers to do.

However, the DRAM speed gains match up with what we have seen with previous generations of AMD APUs, but also it means that Intel’s decision to combine a Vega GPU with high-bandwidth memory is going to be the way forward in this market.

The second point that this data brings is about memory support. One of the major criticisms of AMD’s initial launch of Ryzen was the lack of high-performance memory support, due to a young firmware. AMD has stated that the Ryzen with Vega graphics line of processors have better memory support with newer firmware revisions, capable of driving higher memory speeds. This is, of course, important to APUs. Additional updates will be coming with the new X470 motherboards in Q2.

Zen Cores and Vega: Ryzen APUs for AM4 AMD Ryzen Price Drops, New Wraith Prism
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  • serendip - Monday, January 8, 2018 - link

    Come on AMD, please come up with something in the <4W TDP range for tablets and ultralights. I'm thinking of something that slots in between Apollo Lake Atom and Intel Y-series but with better GPUs than either of those. Gotta be cheap too. Reply
  • PixyMisa - Monday, January 8, 2018 - link

    The 2200U looks like the right part, just constrain the TDP further. Reply
  • jjj - Monday, January 8, 2018 - link

    Is there any news on their Nitero buy? Reply
  • jimjamjamie - Monday, January 8, 2018 - link

    192 core Radeon GPU in 2018, wew Reply
  • Pork@III - Monday, January 8, 2018 - link

    AMD has previously announced that Navy will have a PCI-E 4.0 interface. Either way, in 2018. the new motherboards(4XX series) will be with the current PCI-E 3.0, so it seems logical for Navy to be on the market in the spring of 2019 when the next-generation motherboards (5XX series) will no longer have full maintenance of the PCI-E 4.0. Reply
  • itonamd - Monday, January 8, 2018 - link

    Cool for ultrathin. Great jobs Reply
  • tipoo - Monday, January 8, 2018 - link

    >Radeon 530 discrete GPU, which has 384 compute units based on AMD’s older GCN 1.0 architecture.

    1.0? Is there even any cost savings to integrating such an old architecture? Not even a later GCN within the same fab...
    Reply
  • R3MF - Monday, January 8, 2018 - link

    "Also included at AMD’s event were a number of side announcements that we will also go into. This includes (but is not limited to): Custom Radeon Vega Designs"

    Please! More info, including any information on when (if?) AMD intend to ramp production so AIB vendors can do more than periodically run small batches of custom Vega cards through a factory (at greater expense).
    Reply
  • Pinn - Monday, January 8, 2018 - link

    Are they going to lie about Vega 7nm as well? Is Volta going to wait for Navi? Reply
  • iwod - Monday, January 8, 2018 - link

    Does Vega 7nm necessarily means GF though? I thought the drop of Vega 12nm+ make sense as it would be competing with Ryzen for GF capacity. Given how AMD is doing well and should be even better now when Meltdown is on Intel.

    I would have thought moving Radeon back to TSMC would be a much better choice.
    Reply

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