User's Manual

Basics SDRAM DIMMs - 63
PowerPC G3, and a 2.5 L2 bus ratio, the backside cache bus
speed will be 100MHz, twice the speed of the system bus.
SDRAM DIMMs
Three DRAM expansion slots on the logic board accept 3.3 V
SDRAM unbuffered 8-byte DIMMs. The 168-pin DIMM has a
64-bit-wide data bus per bank. The minimum bank size
supported on the Power Mac G3 Desktop model is 2 MB, and
the largest is 32 MB. The largest DIMM supported is a two-
bank DIMM of 64 MB using 32 Mbit SDRAM devices.
While the Power Mac G3 Desktop logic board supports a
maximum RAM expansion of 384 MB, the 128 MB JEDEC
industry-standard DIMMs are too tall to fit in the Desktop
chassis. (The Power Mac G3 Desktop accommodates a DRAM
DIMM height of 1.15 inches maximum.) Therefore, low-