Memory Information
	RAM Speed DIMM type On Board RAM Number of DIMM Slots Supported sizes in MB Maximum RAM Virtual Memory On Board VRAM Number of VRAM slots Cache DIMM slot Cache DIMM size	70ns 168 pin 0 12 4,8,16,32, 64,128 1536MB 1GB See VRAM See VRAM No N/A

Notes

The Power Macintosh 9500/120 and 9500/132 are the first Macintosh computers to use DRAM Dual In-line Memory Modules (DIMMs) instead of DRAM SIMMs. Whereas SIMMs have 72 pins, DIMMs have 168 pins. The extra pins provide a 64-bit data path, compared to a 32-bit data path for SIMMs. In addition, DIMMs do not have to be installed in pairs like the SIMMs on earlier Macintosh models. (However, to take advantage of memory interleaving, the DIMMs should be installed in paired slots. See "Memory Configurations" in Basics for more Information.) Important: The Single In-line Memory Modules (SIMMs) used in previous Macintosh models are NOT compatible with the Power Macintosh 9500/120 and 9500/132. Memory Configurations The Power Macintosh 9500 Series logic board has 12 DRAM DIMM slots, each with a 64-bit data bus. You can increase the computer's DRAM to a total of 768 MB using 5-volt, 64-bit-wide, 168-pin fast-paged mode, 70ns DIMMs. When installing DRAM DIMMs in the Power Macintosh 9500, fill slot A6 first, followed by B6, then A5, followed by B5, and so on. DRAM DIMMs can be installed individually; however, if you wish to take advantage of memory interleaving*, which provides maximum performance, you must install the DIMMs in matching pairs and in paired slots (A6 and B6 first, then A5 and B5, and so on). DIMMs purchased from different manufacturers can be paired as long as they are the same size and speed. *Memory interleaving allows the computer to read or write to its memory while other memory reads or writes are occurring, thus providing for faster performance.

VRAM Information

The Power Macintosh 7500, 8500, and 9500 have no VRAM soldered on the logic board. The Power Macintosh 9500/120 VRAM is expandable by adding VRAM DIMMs to the video card. NOTE: Power Macintosh 9500/120 customers can get a VRAM upgrade from ATI Technologies, Inc. No VRAM upgrade is available from Apple. Since 9500s without video cards require third-party PCI video support, the VRAM requirements and capabilities vary by manufacturers. Power Macintosh Family VRAM Included Maximum 7200 1 MB Logic Board 4 MB 7500 2 MB via DIMMs 4 MB 8500 2 MB via DIMMs 4 MB 9500/120 2 MB on video card 4 MB