Overclocking of processors and graphics cards is common, but have you ever seen an overclocking server processor? A great spirit netizen from a foreign forum did it, successfully surpassing AMD EPYC Xiaolong processor, and the performance soared instantly. The server processor and motherboard BIOS are generally locked and cannot be overclocked directly, but there are also some ways to save the nation by curves, such as overclocking by using P-State performance state. Almost any processor has different P states, representing different frequencies and voltages. For example, P0 corresponds to the highest performance. P1 and P2 will reduce the frequency and voltage appropriately to save energy. By editing the P states, the processor can be forced to run in different states. The overclocking object of @nero243 netizen is an AMD skydragon 7551, quasi-flagship model, 32 cores and 64 threads, original reference frequency of 2.0GHz, acceleration frequency of 3.0GHz, support for 8-channel DDR4-2666 memory, 128 PCIe 3.0, thermal design power consumption of 180W. However, the actual overclocking is an engineering sample with a default frequency of only 1.6GHz. The overclocking process is quite professional and complicated. Simply put, first find a motherboard with a specific type of register (MSR) open and write overclocking settings to it. The tool used is Asustek's unofficial software ZenStates, which supports Windows and Linux. Although it only supports Asustek's own motherboards, fortunately the source code is published on GitHub. You can manually modify the EXE executable file and adjust the CHECK VENDOR part, which can be used on other motherboards. Let's just say the result: 3.4GHz at 1.3V and 3.8GHz at 1.375V, and all 32 cores are fully open. It should be noted that since the server platform is not designed for overclocking, the Vcore core voltage cannot be increased too much, otherwise it will trigger the over-current protection (OCP) of the mainboard power supply. at the same time, the temperature of the power supply circuit must be paid attention to at any time. it is better to add an active fan and, of course, liquid nitrogen is better. As for performance, CineBench R15 achieved a multi-core score of 2014 at 1.6GHz, reaching 5116 points after overclocking to 3.8GHz, an increase of 1.5 times! This has basically caught up with the flagship 2990WX of the second generation thread ripper, which is also a 32-core 64-thread, with a frequency of 3.0-4.2GHz and measured results of around 5200-5300 points. EPYC 7551 before and after overclocking