For now see VPro wiki topic.
V10 in Fuel
The Fuel used V10s with two different part numbers.
The first V10, those with part number 030-1725-00x, had 32MB of memory soldered to the PCB.
Later in production SGI began using V10s with part number 030-1826-00x. It was discovered that these V10s actually had 128MB of memory - the PCB and components are identical to the 030-1726-00x V12 used in the Fuel.