S1 is Solid Silicon's first server and workstation OpenPOWER CPU (POWER ISA v3.1). It uses PCIe Gen 5[1] and DDR5[2]. The S1 will be compatible with major x86 HSF's[3].
The S1 was removed from Solid Silicon's website sometime after 2025 Feb 9[4]. The reasons for removal are unknown.
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