Socket sWRX8, also known as Socket SP3r4, is a land grid array (LGA) CPU socket designed by AMD supporting its Ryzen Threadripper Pro 3000 and 5000 series workstation processors, which are based on Zen 2 and Zen 3 platforms, respectively.
It was initially launched in July 2020 for OEMs only,[1] with retail availability coming later in March 2021.
[3][4] It is physically identical to, but electrically incompatible with both sTRX4 and AMD's server socket SP3.
[5] While Socket SP3 doesn't require a chipset, instead utilizing a system-on-a-chip design, Socket sWRX8 requires a chipset to provide improved connectivity and functionality.
For Socket sWRX8, the WRX80 chipset was developed, which together with the CPU, provide a total of 152 PCIe 4.0 lanes.