An easy DDR5-6200 CL30 setup for the 9800X3D

Summary

In this video, Buildzoid reviews a DDR5 setup using the Ryzen 7900X 3D CPU paired with G.Skill's Trident Z5 Neo RGB memory kit. While the CPU works well in 2:1 mode with DDR5 8000, it struggles significantly in 1:1 mode, failing to maintain stability at high frequencies despite extensive testing. The reviewer expresses frustration with the CPU's inconsistent behavior and its inability to run tighter timings or higher frequencies, ultimately settling on a stable but underwhelming 6200 CL30 setup. Despite the performance issues, the video highlights the challenges of overclocking and the unpredictability of the Silicon Lottery.

Takeaways

• 😀 The video explores overclocking DDR5 memory on a Ryzen 7900X 3D using a G.Skill Trident Z5 Neo kit, provided by G.Skill.
• 😀 The memory kit is a 2x6 GB 6000 CL28 setup featuring Hynix 16 GB AI chips in a single-rank configuration.
• 😀 The CPU shows disappointing performance in one-to-one mode, particularly when trying to run DDR5 above 6400 MHz with tight timings.
• 😀 In contrast to two-to-one mode, which works fine at 8000 CL34, one-to-one mode results in frequent stability issues and errors, even at 6200 CL28.
• 😀 The reviewer is frustrated with the CPU’s inability to handle higher memory frequencies in one-to-one mode, especially when trying to tighten memory timings.
• 😀 The CPU occasionally runs at 6400 MHz but errors out during stress tests like Prime 95 after a short period, highlighting stability issues.
• 😀 Despite extensive tuning, such as adjusting timings, voltage, and various settings in the BIOS, the CPU continues to perform inconsistently.
• 😀 The reviewer suspects that the instability could be due to a combination of the CPU’s limitations and potential compatibility issues with the Asus motherboard.
• 😀 The reviewer ultimately concludes that the CPU is a major bottleneck, as settings that should be stable (like 6200 CL30) continue to cause problems.
• 😀 The video highlights the unpredictable behavior of the CPU in one-to-one mode, noting that the issue is more about CPU inconsistency than the memory kit itself.

Q & A

What is the primary issue with the Ryzen 7900X 3D CPU in one-to-one memory mode?

The main issue with the Ryzen 7900X 3D in one-to-one mode is its inability to maintain stability at higher memory frequencies, even with high-quality memory kits. It works at 6400 MHz but fails to run reliably at lower latencies or with other optimizations like disabling gear down mode or running higher FCLK settings.

What memory kit is used in the testing, and what is its configuration?

The memory kit used is a G.Skill Trident Z5 Neo RGB 2x6GB 6000 MHz CL28, which features Hynix 16GB AI memory chips in a single-rank configuration.

What is the result of using the 2:1 memory mode with the Ryzen 7900X 3D?

In the 2:1 memory mode, the Ryzen 7900X 3D works much better, with a stable setup running at DDR5 8000 CL34 without major issues. This configuration is relatively easy to set up compared to one-to-one mode.

What challenges did the user encounter when attempting to run the CPU at 6400 MHz?

The user faced several challenges, including the system failing Prime95 tests after a few minutes and experiencing instability even at higher voltages (up to 1.3V). There was also difficulty tightening memory timings, which led to further errors and instability.

What are the settings the user ultimately settled on after troubleshooting?

The user eventually settled on a DDR5 6200 CL30 setup using conservative timings, essentially treating it as a compatibility mode. Settings like TRC, TRP, and refresh interval were set based on stability, with some settings left at default auto values.

Why does the user believe the issue lies with the CPU rather than the motherboard or memory kit?

The user believes the issue is with the CPU because, despite using a high-quality memory kit and a good motherboard (Asus Crosshair X670E Hero), the CPU is consistently unstable at higher frequencies in one-to-one mode. The user suspects the CPU might have defective silicon, which is preventing proper performance.

How does the user describe the behavior of the Ryzen 7900X 3D CPU in one-to-one mode?

The user describes the CPU’s behavior as inconsistent and erratic. It occasionally works at certain settings but tends to fail after varying amounts of time in stress tests like Prime95. This unpredictable nature is compared to Intel CPUs, which typically show a clear distinction between stable and unstable configurations.

What specific memory settings did the user use for the 6200 MHz setup?

For the 6200 MHz setup, the user used CL30 for the primary timings, with a TRC set to match TRAS + TRP, a refresh interval of 65,000 (due to a cooling fan on the memory), and typical settings for Hynix-based memory at this frequency.

What does the user think about the importance of memory tuning on the Ryzen 7900X 3D?

The user is disappointed with the CPU’s lack of ability to handle aggressive memory tuning in one-to-one mode. They express frustration with the CPU’s failure to achieve desired results, despite using a capable memory kit, and note that Ryzen 7900X 3D does not show the performance improvements expected from high memory overclocking.

Why is the user hesitant to attempt further tuning or use Nitro settings?

The user is hesitant to continue tuning or use Nitro settings because of their frustration with the CPU’s erratic behavior and lack of consistent stability. They feel that further adjustments would likely result in worsening the situation, as nothing previously tried improved performance significantly.