The SPARCstation IPX incorporates a 40 MHz Fujitsu MB86903 or Weitek W8701 processor. Weitek sold an 80 MHz aftermarket "SPARC POWER µP" (2000A-080 GCD) processor [1] for the IPX, which requires a ROM update to v2.9. This IPX has the Weitek W8701 processor and the v2.9 Rom. When I purchased it, I verified the Rom was 2.9, as I wanted to test NetBSD on the IPX and the NetBSD installer required certain aspects of v2.9. NetBSD 9 later proved to be a bit much for the IPX, and I experimented with it on the Sun SPARCstation 10 restore.
The SPARCstation IPX has four 72-pin SIMM slots for memory expansion. The memory uses parity Fast Page Memory (FPM) SIMM's with speeds of 50-80 ns. Slots can be filled individually, giving a maximum of 64MB memory. This IPX came with 64Mb of RAM installed. Additional 32 and 64MB SBus "Above Board" RAM expanders will fit and work with the IPX using the 8-pin J101 header, which contains additional power and clock signals next to the DMA/Cache controller.
The SPARCstation IPX can hold one internal 3.5", 50-pin, single-ended, fast-narrow SE SCSI disk drive and a 3.5" 1.44MB floppy drive. Both are mounted in the top cover of the case. The hard disk slot supports taller drives than the 1-inch format that became standard later. It also supports external SCSI devices. The largest hard disk shipped by Sun with the IPX was 2.1G drive. When I replaced the hard drive with a SCSI2SD board, I built a custom 3D printed SBUS plastic board and mounted the SCSI2SD on that for access to the SDCard shot hole for the SBUS Card. This makes it easy to change out or backup the SDCard occasionally without opening the shell. This is the same design used on the SPARCstation IPC restore.
The IPX came with a cgthree color frame buffer on the motherboard. Like all SPARCstations, the default resolution was 1152x900. I added a few different frame buffers over the following year before settling on the one mentioned below.