SK Hynix DDR5 memory showed some excellent overclocking capabilities on the older X670E platform and was tested on both 8600 MT/s and 8800 MT/s. However, the former was completely stable, unlike 8800 MT/s, where the RAM showed errors.
DDR5 RAM speeds of over 7000 MT/s are somewhat rare to see on AMD platforms, but it isn't impossible. In fact, some overclockers have now pushed the RAM speed close to 7000 MT/s with 4x DIMMs, as we saw recently. Reaching 8000+ MT/s is even rarer but isn't impossible, at least for the overclocked "sugi0lover".
The user uploaded a video showing his overclocking experiments on the previous-gen 600-chipset AM5 motherboard. The configuration included the SK Hynix memory, ASUS ROG Crosshair X670E GENE motherboard, and AMD Ryzen 7 9800X3D CPU. The default memory speed was 5600 MT/s, but the overclocker pushed the speed to 4300 MHz or 8600 MT/s, which is an incredible feat, particularly on the older X670 platforms.
The ROG Crosshair X670E GENE supports up to 8000 MT/s, but reaching 8600 MT/s isn't easy, and that too with excellent stability. Various memory tests were conducted, and the results were flawless. The ETR memory test showed zero errors, and so did the RunMemTestPro, where the module was tested several times. However, when the memory was overclocked to 8800 MT/s, it couldn't deliver such results, and the memory failure was about 40%.
Nonetheless, 8600 MT/s is indeed a great feat, but achieving this speed may not be possible with dual sticks. However, the X870/X870E platforms may help achieve superior speeds with even lower CL timings. Apart from the excellent memory overclocking results, the user also pushed the Ryzen 9800X3D to 5.6 GHz across all the cores. The best part was the incredibly low temperatures, which didn't exceed 50°C, and that too occasionally. A high-end liquid cooling solution must be deployed, but thanks to the chip design, cooling the 9800X3D is far easier than predecessors.
However, a quick look at the power consumption shows that the CPU was able to reach over 130W, and the average power consumption remained higher than 100W. This is expected and is still far better than power-hungry, high-end CPUs.