Power Macintosh 8100; Workgroup Server 8150 - wiki

CPU
PowerPC 601 @ 80.00MHz (8100/80; WGS 8150/80)
PowerPC 601+ @ 100.00MHz (8100/100)
PowerPC 601+ @ 110.00MHz (8100/110; WGS 8150/110)
FPU onboard
System bus @ 40.00MHz; 64-bit (8100/80; WGS 8150/80)
System bus @ 33.33MHz; 64-bit (8100/100)
System bus @ 36.66MHz; 64-bit (8100/110; WGS 8150/110)

256k L2 cache installed from factory
256k, 512k, 1MB aftermarket L2 cache modules available for all models

Memory
8MB onboard, 70ns; 264MB max
8 x 72-pin SIMMs, 80ns or faster, interleaving pairs of two when evenly matched

Machine ID:
12 (8100/120)?
40 (8100/110; WGS 8150/110)
55 (8100/100)
65 (8100/80; WGS 8150/80)

Will boot from SCSI CD holding C:

Reset & Interrupt
Discrete front panel buttons & soft keyboard (Ctrl+Cmd+Pwr / Ctrl +Pwr)

Cache & Accelerator Performance Data
XLR8TOR Warp Factor 135
My 110MHz model is only stable at setting B (39/78/117) and below, which is unexpectedly low. Setting A (40/80/120) sometimes boots in safe mode (the chime is a touch raspier than normal) and the clock speed is verifyable. Faster settings do not chime. Setting B is also stable with a Sonnet G4 at 352MHz.

Acrobatics - without removing the board

• All eight RAM DIMMs can be removed and reinserted; requires moderate skill.
• The Warp Factor 135 module can be easily removed, and reinstalled with moderate effort. The accompanying insert fan for the CPU cooler (probably) can't be accessed without removal of the board; at least the adjustable piece can be repeatedly swapped with the board installed.
• The cache DIMM can be inserted while the ROM DIMM is populated, though I cannot imagine succeeding without removing the power supply. Moderate bending of the chassis is required but this is probably still safe compared to removing the front button assembly to access the board. Patience, dexterity, and precisely channeled force required; the contacts in the cache DIMM socket are quite grippy and the socket itself has tall guide channels which make for a very tight turn-in against the PS fan grille.

Images of the AV and HPV cards on the Apple page in the Rolodex

Main logic board (8100/100) 820-0588-A

Main logic board (8100/110; WGS 8150/110) 820-0588-A

ROM DIMM (8100/100, 8100/110; WGS 8150/110) 341-0757 / KMM264512G-12

256k L2 Cache DIMM (8100/100, 8100/110; WGS 8150/110) SCP72MB32SG14

Peltier Cooler/Heatsink assembly (8100/110; WGS 8150/110)

2MB/4MB High Performance Video (HPV) Card (All non-AV models) 820-0509-A