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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  • mode_13h - Thursday, February 1, 2018 - link

    Too much. About 2000 IU/day is optimal for minimizing all-cause mortality. Perhaps more can be supplemented in short spurts, however.

    It might be possible to safely exceed 2k IU/day if also supplementing magnesium and/or vitamin K, since one of the down-sides of overdosing Vitamin D is calcification of blood vessels.

    Anyway, Vitamin D isn't the only proven immune booster. Garlic is another good one.
    Reply
  • ckbryant - Saturday, February 3, 2018 - link

    Endocrinology professor once said that the nations with the highest incidences of skin cancers (Australia) also have the lowest rates of population with low vitamin D, even in the Southeast United States people are going outside less and less; especially in the older populations. Not to mention the younger age groups with the phone attached to their face 24/7, and most people over 65 will need 2000-5000units of Vit D3 supplementation/day. However, in extreme cases a once weekly dose of Vit D2 1.25mg (50,000 units) once weekly for 12 weeks then reassessing lab values will render >45ng/dl will will be about where most people need to be. Then daily normal supplementation can continue from there. Endo professor said people who smoke need to avoid Vit A, and Copper supplementation unless they are in high risk of Macular Degeneration due to the increased risk in smokers of Vit A and Copper supplementation causing increased correlation of cancer. However he always emphazies that study x and study y can generate relevant data, and one study can "disprove findings" of another, because CORRELATION does NOT prove CAUSATION. Reply
  • letmepicyou - Friday, February 2, 2018 - link

    Yeah, here's another tidbit for you all to research...SELENIUM. 95% of American diets are severely deficient in Selenium. Selenium is an immune system regulator. Best source of Selenium = Brazil Nuts. In fact, not one to spread conspiracy theories (ok, yes I am), but I read a rather in-depth article once by an AIDS researcher that claimed that AIDS isn't even caused by HIV (like conventional "wisdom" claims), but rather every subject he took samples from and tested that had AIDS actually was severely deficient in Selenium in their body. Since I've been eating 1 brazil nut a day, I haven't been sick in YEARS. Most I've ever had was a sniffle, but it goes no further into my RT than my nose. Check it out. Reply
  • mode_13h - Thursday, February 8, 2018 - link

    Too much selenium is strongly linked to development of insulin resistance. So, be careful with long-term selenium supplementation and Brazil nut consumption. One/day is probably fine, but not much more. Reply
  • AndrewJacksonZA - Monday, January 8, 2018 - link

    Get well soon Ian!! Reply
  • mateau - Monday, January 8, 2018 - link

    @Ian ...

    "It is our understanding that the 12nm process is essentially a 14+ process for GloFo"

    Would you please a credible source for that statement. Say, EETimes or other such Industry outlet rather than an garnished from sites who do nothing other than plagiarize work that fits into the point they are try to make.

    I too have read on-line media's dismissal of GloFo 12nm process. Everything that I have read on this matter is based upon an early on-line media piece highly critical to AMD that tried to minimize the impact of 12nm. GloFo on their website specifically states that 12nm is a NEW process node and it is 12nm. GloFo has announced that 12nm IS 12nm, a new shrink from 14nm. Announcing falsely would create all sorts of problems with the FTC and lawyers who do nothing but specialize in Class Action suits. Case in point Intel is getting it's clock cleaned due to their knowledge of and failure to eliminate the Meltdown hardware flaw.

    As with ALL process nodes, the entire die is not fabbed with say 12nm or 14nm or for that matter the upcoming 7nm node. There are components within the die that can be and sometimes must be greater in size than the process node taped out for the silicon.

    Perhaps you shaould also take the time to ask Dr. Su directly if ONE DESIGN covers ALL EPYC, RYZEN and Threadripper design? In my opinion EPYC is a design similar to Zeppelin and Ryzen but with some major design differences that make a server processor.

    No sense speculating on something if you can ask AMD CEO directly.
    Reply
  • A5 - Monday, January 8, 2018 - link

    They may have been able to reduce the minimum possible feature size in a way that lets them claim a new number, but that doesn't necessarily mean that the performance of a finished product is significantly different.

    It's impossible to know until products are out in the world, because all we have for now is GloFo PR statements, which are going to make things look as rosy as possible.
    Reply
  • SaturnusDK - Monday, January 8, 2018 - link

    The Zeppelin die covers all Ryzen, Ryzen Pro, Threadripper, and EPYC CPUs. However, there are parts disabled on those designated Ryzen and Threadripper that are enabled on Ryzen Pro and EPYC. I do not know for certain if there is any feature differences between Ryzen Pro and EPYC but judging from AMDs own information there doesn't seem to be. Reply
  • Dr. Swag - Monday, January 8, 2018 - link

    https://www.anandtech.com/show/11854/globalfoundri...

    based on improvements in the 10-20% range calling it "essentially a 14nm+ node" seems reasonable to me.
    Reply
  • iwod - Monday, January 8, 2018 - link

    Huh?

    Meltdown - Not relevant here.
    TSMC called their 16nm++ ( or was it 16nm +++ ) as 12nm.
    And FTC would have a problem with Intel because their 10nm really should be 7nm by Fab Industry measurement.

    And it is not garish, it is straight from GF investor conference.

    Design? Speculate? Is Goldmount the same design as Goldmount+. Do QA and feature / yield test accounts for design? And more importantly, do even any other chip maker disclose these information? There is something call trade secret.
    Reply

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