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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  • ckbryant - Saturday, February 3, 2018 - link

    Flu Vaccines are CDC predictions for which flu will be seen in a given season, it is rarely above the teens in effectiveness for the exposed populations but the groups who get the vaccine and then still get exposed to the flu they usually have a milder case of the flu due to exposure to those antibodies. Inoculation is an old science, effective for some things but a virus with more strains and mutations each year will greatly limit the ability of any vaccine. Polio vaccine was wonderful in that polio wasn't hybridized and constantly changing, it's virus was very mundane and boring which made it quite predictable. Also flu vaccines are big money for everyone involved, there is ZERO money to be made in curing anything anymore. Just look at Hep C "cures" like Solvadi and Harvoni are over 84k to 128k for a 12 week regimen all because they have less risks and are comparable to Interferon treatment along with Ribavirin. Should Jonas Salk have charged the equivalent of 84-128k for the polio "cure"? No! In America should it be okay for Sanofi and Lilly to charge 500+ dollars for Lantus/Basaglar/Humalog/Humulin etc etc....big money, big interests Reply
  • vortmax2 - Tuesday, February 6, 2018 - link

    Part of the reason for low efficacy rates is because of the why flu serums are 'grown'...eggs. They have found that the viruses are mutating and become less effective against the ones in the wild. The serums grown in animal cells (for those with egg allergies) have been found not to suffer from mutations.

    More significantly, there has been significant progress with a new type of flu vaccine that uses our skin cells to develop antibodies based on the actual DNA of the particular virus. This is 'injected' intradermally via a 'gun' (similar to the hypospray in Star Trek lore). Expected to see human trials in the next 5 years or so. Very cool.
    Reply
  • bmil - Wednesday, March 7, 2018 - link

    .. and less stress and more workout
    http://blog.razmere.si/does-stress-make-you-tired/
    Reply
  • Rοb - Wednesday, January 24, 2018 - link

    But I smoke heavily, drink coffee almost continuously, eat poorly and avoid the Sun, and don't take vitamin supplements.

    I haven't been sick in decades ...

    Not that I would advise anyone to smoke nor offer medical advice but there's flu shots (which I also don't have) that will reduce your vulnerability rather than copy my lifestyle.
    Reply
  • MFinn3333 - Thursday, February 1, 2018 - link

    The problem with that attitude is that you are chipping away at your body's natural defenses against all kinds of diseases, such as COPD, over time.

    You are born with a lot of over-provision inside each of your organs. Those activities are eating away faster than normal. What happens when you run out of extra "space"? Same as on an SSD Degraded performance or size.

    Reply
  • mode_13h - Thursday, February 1, 2018 - link

    Also, cardiovascular risk factors are known to affect brain health. Reply
  • mode_13h - Thursday, February 1, 2018 - link

    Everything is fine... until one day, it's not. I have a co-worker somewhat like you describe (though he probably ate a bit better than that). He had a massive heart attack. He's still with us, but such an event is probably more costly and disruptive to one's life than simply taking better care of yourself. Reply
  • mode_13h - Thursday, February 1, 2018 - link

    BTW, coffee is probably a net-positive, as long as you keep the cortisol in check and don't add lots of sugar. Reply
  • MFinn3333 - Saturday, February 3, 2018 - link

    It is incredibly easy to get Vitamin D outside of the Pacific Northwest or similiar environments...

    "If you're fair skinned, experts say going outside for 10 minutes in the midday sun—in shorts and a tank top with no sunscreen—will give you enough radiation to produce about 10,000 international units of the vitamin. "
    Reply
  • mode_13h - Thursday, February 8, 2018 - link

    Um, so exactly how does this help in winter, where the only exposed skin most people have is on their face and hands?

    And getting a couple hours/day of direct sun exposure on your face is going to take its toll on skin aging and cancer risk.
    Reply

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