Allgemein CPU Data Storage Gaming GPUs Hardware Reviews

Hurdles and Solutions: AMD's APU Ryzen 5 2400G tested with different storage settings

The test system

In our article "White and Fast: KFA2 Hall Of Fame Extreme DDR4-4000 in Test" we have already seen that the Core i7-8700K and the Ryzen 7 2700X benefit from an increase in memory frequency and also offer increased CPU and game performance. However, we also wanted to know whether this also applies to a Ryzen APU and its integrated Vega graphic and, above all, to what extent. For this purpose, a Ryzen 5 2400G APU with four cores (SMT, eight threads) with integrated Vega-11 graphics unit was used, because there is currently no faster.

Test system in the housing
AMD Ryzen 5 2400G
Be Quiet Silent Loop 360mm
Asus ROG Strix X370-F Gaming
SSD Crucial MX200 500Go
Dark Power Pro 11 750W
Be quiet! Dark Base Pro 900
Memory: G.Skill Sniper X DDR4-3400 CL16
Monitor: Eizo EV3237-BK
Be quiet! Dark Base Pro 900

When it comes to memory, we rely on the G.Sill Sniper X DDR4-3400 CL16, which AMD supplied for the sample, whose exact data I also quickly summarized in a table:

16GB (2x8GB)
Clock frequency   
3400 MHz
Timings CL 16 16-16-36
Voltage 1.35V
Cooling Heat Sink
Profiles Intel XMP 2.0
Product code F4-3400C16D-16GSXW

RAM Timings on Ryzen: We Explain the Puzzle

I wanted to do these tests on the well-known X470 platform, but even the first runs proved unexpectedly problematic: even at low DRAM frequencies, the platform (with the latest BIOS or the previous version) was unstable in a cow on stilts as soon as I really demanded the graphic. First I had the Ryzen 5 2400G and then the G.Skill kit in my suspicions, but it turned out that it was the motherboard that created the problems. The walk to the warehouse was logical and so I switched to another model, an Asus ROG Strix X370-F Gaming….

The G.Skill Sniper X Kit is ryzen compatible by self-declaration, which is also confirmed by a bold sticker on the packaging. However, it still seems that individual Ryzen platforms are still quite moody as a diva before brushing their teeth, which of course could also be due to the XMP profiles of the memory modules (an Intel technology that is only used as a small one as a reminder). However, both MSI and Asus also provide automatic DRAM timing management using the A-XMP and D.O.C.P. capabilities in their respective UEFIs. at least.

In practice, I still had to snap the ns duration for each latency type and then manually convert it into bagged timings using a kind of "magic formula" in a simple calculation (timing = latency in ns / clock cycle time). For a better overview, I have here tabularatable a summary of the latency in ns and the corresponding calculated times for the G.Skill Sniper X DDR4-3600 CL16 Kit, whereby then, taking into account certain rules, of course also on the next suitable unit must be rounded (e.g. tRC must be greater than or equal to the sum of tRAS + tRP).

DDR4 Clock rate 2133 2400 2666 2800 2933 3000 3200 3400
Clock cycle time 0.938 ns
0.833 ns
0.75 ns
0.714 ns
0.682 ns
0.667 ns
0.625 ns
0.588 ns
(9,342 ns)
9.96 11.21 12.45 13.08 13.7 14.01 14.95 15.88
(9,342 ns)
9.96 11.21 12.45 13.08 13.7 14.01 14.95 15.88
(9,342 ns)
9.96 11.21 12.45 13.08 13.7 14.01 14.95 15.88
(9,342 ns)
9.96 11.21 12.45 13.08 13.7 14.01 14.95 15.88
(21,125 ns)
22.53 25.35 28.16 29.58 30.98 31.69 33.8 35.91
(30,424 ns)
32.45 36.51 40.56 42.59 44.62 45.64 48.68 51.72
(350 ns)
373.28 420 466.55 490 513.28 525 560 595
(2,148 ns)
2.29 2.58 2.86 3.01 3.15 3.22 3.44 3.65
(4,849 ns)
5.17 5.82 6.46 6.79 7.11 7.27 7.76 8.24
(24 ns)
25.6 28.8 31.99 33.6 35.2 36 38.4 40.8

Once we have calculated these timings, all we have to do is configure the UEFI accordingly. The timings have been set to achieve approximately the same latency in ns and only the clock frequency of the memory becomes the only variable parameter during the individual runs. Anyone who is now afraid of too much theory is reassured. On the next page I test the whole thing with some motherboards and the usual replica settings in deciphered form.

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About the author

Igor Wallossek

Editor-in-chief and name-giver of igor'sLAB as the content successor of Tom's Hardware Germany, whose license was returned in June 2019 in order to better meet the qualitative demands of web content and challenges of new media such as YouTube with its own channel.

Computer nerd since 1983, audio freak since 1979 and pretty much open to anything with a plug or battery for over 50 years.

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