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]. PROT_SAO will not be supported^[4]. The S1 is aimed at a similar market to Sforza^[5].

The S1 was removed from Solid Silicon's website sometime after 2025 Feb 9^[6]. The reasons for removal are unknown.

References

[1] Raptor tweet 2023 Oct 20

[2] Raptor tweet 2023 Oct 20

[3] Raptor tweet 2023 Oct 20

[4] Raptor tweet 2023 Oct 20

[5] Raptor tweet 2023 Oct 20

[6] Solid Silicon website, Wayback Machine archive 2025 Feb 9

[1]

[2]

[3]

[4]

[5]

[6]

S1

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