SunPCi

SunPCi is a series of single-board computers with a connector that effectively allows a PC motherboard to be fitted in Sun Microsystems SPARC-based workstations based on the PCI architecture adding the capability for the workstation to act as a 'IBM PC compatible' computer.

[1] The Sun PCi cards included an x86 processor, RAM, expansion ports, and an onboard graphics controller, allowing a complete Wintel operating environment[a] on a Solaris system.

[4] SunPC was offered as a replacement software emulator that could be used to run more advanced applications, with higher performance, by adding an X86 hardware accelerator.

[2][10] The next year Ultra 5 systems including a SunPCi with a 300 MHz AMD K6-2 processor and 64 to 256 MB RAM were available.

[12] With the release of version 2.2 of the SunPCi II software in 2001 it was possible to have more than one accelerator card in a workstation or entry-level Sun Enterprise server.

SunPCi card with 400 MHz processor
SunPC Accelerator DX
The SunPCi was originally used in workstations such as the Ultra 5