Ryzen 7000 Engineering Sample: Overclocker runs Raphael with 64 GB DDR5-6400 CL32

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The professional overclocker “Toppc”, which competes under the MSI flag, among others, uses an unknown development sample processor from the AMD Ryzen 7000 (“Raphael”) series with 64 gigabytes of DDR5 -6400 and a sharp CAS latency of 32 clock cycles. The memory timings are CL32-38-38-96-134.

AMD Ryzen 7000 ES with DDR5-6400 CL32

With regard to emerging screenshots, benchmarks and database entries of pre-series processors, so-called Engineering Samples (ES) or Qualification Samples (QS), there is currently a boom. After Intel's next generation of desktop hybrids aka Raptor Lake in the form of an i5-13600K and i7-13700K as well as an i9-13900K with DDR5-6600 in various benchmarks and databases, it's now AMD Ryzen 7000's turn .

Professional overclocker “Toppc” has posted its current memory settings for a prospective pre-production model based on Zen 4 on its profile page on the Chinese video-sharing platform Bilibili.

  • AMD Ryzen 7000 Engineering Sample
  • 64 Gigabyte DDR5 with 6400 MT/s
  • CL32-38-38-96-134

Since the Chinese overclocker published the picture under the name “Toppc's AMD CPU” and the screenshot from CPU-Z shows the main memory as DDR5, it can only be a Zen 4 desktop CPU.

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AMD Ryzen 7000 ES with DDR5-6400 CL32 (Image: Toppc)

For the CPU duel between the Core i 13000 series and Ryzen 7000, both platforms will start “out-of-the-box” with support for up to DDR5-5600. Easy overclocking of the DDR5 DIMMs should be possible for everyone using Intel XMP 3.0 and AMD RAMP and EXPO.

DDR5 still has a lot of room for improvement

Assuming the appropriate memory kits with fast ICs, there would already be more today than enough leeway for extremely ambitious RAM overclocking, because with the JESD79-5 standard, JEDEC has already officially specified memory with DDR5-3200 to DDR5-8400 and even higher clock rates have already been promised.

< p class="p text-width">While SK Hynix promised DDR5 RAM with an effective 8,400 MHz more than two years ago, Adata promised DDR5 with up to 12,600 MT/s at voltages of up to 1.6 volts when introducing the new memory generation.

But such fast memory will probably not be available before 2023. The Raptor Lake vs. Raphael duel is expected to be played at DDR5-5600 to DDR5-7200.

ADATA promises memory kits with DDR5-12600t-DDR5-12600 (image: ADATA)

DDR5-4800 to DDR5-7200

The editors have compiled a corresponding overview of all combinations of memory clock and memory bandwidth as well as latency and latency time, the so-called clock cycle time, that are already available and provides an overview of the most common DDR5 memory modules.

A fast DDR4-3200 module with CL14 was used for comparison – more on this:

  • DDR5 main memory: bandwidths, latencies and latency times at a glance
Memory clock I/O clock* Effective memory clock** Memory bandwidth Clock cycle time Latency DDR5-4800 CL40 300 MHz 2,400 MHz 4,800 MHz 38.4 GB/s
4800 MT/s 0.42 ns 16.67 ns DDR5-4800 CL38 15.83 ns DDR5-4800 CL36 15.00 ns DDR5-5200 CL40 325 MHz 2600 MHz 5200 MHz 41.6 GB/s
5200 MT/s 0.39ns 15.38ns DDR5-5200 CL38 14.62ns DDR5-5200 CL36 13.84ns DDR5-5600 CL40 350MHz 2800MHz 5600MHz 44.8GB/s
5600MT/s 0, 36ns 14.29ns DDR5-5600 CL38 13.57ns DDR5-5600 CL36 12.86ns DDR5-6000 CL40 375MHz 3000MHz 6000MHz 48.0GB/s
6000MT/s 0.34ns 13 .33ns DDR5-6000 CL38 12.76ns DDR5-6000 CL36 12.00ns DDR5-6400 CL40 400MHz 3200MHz 6400MHz 51.2GB/s
6400MT/s 0.32ns 12.50ns DDR5-6400 CL38 11.88ns DDR5-6400 CL36 11.25ns DDR5-6800 CL40 425MHz 3400MHz 6800MHz 54.4GB/s
6800MT/s 0.30ns 11.76ns DDR5-6800 CL38 11.17ns DDR5-6800 CL36 10.56ns DDR5-7200 CL40 450MHz 3600MHz 7200MHz 57.6GB/s
7200MT/s 0.28ns 11.11ns DDR5-7200 CL38 10, 55ns DDR5-7200 CL36 10.00ns DDR4-3200 CL14 400MHz 1600MHz 3200MHz 25.6GB/s
3200MT/s 0.62ns 8.75ns DDR4-3200 CL18 11.25ns * ) connection to the memory hercontroller; **) Clock compared to SDRAM