The Power Mac 5300-series and its LC and Performa variants have two (2) 72-pin slots and a 32-bit data bus. This computer requires standard 80ns non-parity SIMMs or faster, in either 2k or 4k refresh, and typically ships with either an 8MB or 16MB SIMM in one of the SIMM slots.As there is no DRAM soldered to the logic board, the 5300-series requires that at least one SIMM be installed for the computer to boot. SIMMs may be installed in any slot, in any order, and in any size, with supported memory configurations including 8MB, 12MB, 16MB, 20MB, 24MB, 32MB, 36MB, 40MB, 48MB and 64MB. Since this logic board does not have a 64-bit data path, there is no need to install SIMMs in pairs, as in earlier generations of Power Macintosh. The maximum amount of usable memory in the 5300-series & variants is 64MB, in the form of two (2) 32MB SIMMs.
This motherboard does not support memory interleaving.
L2 cache comes preinstalled in most variants, in the form of a proprietary SIMM that also hosts ROM ICs on its reverse side. Article Power Mac 5300 100 LC Description (TECHINFO-0018362) from Apple's Technical Information Library (TIL) provides further details. Replacement pieces, in the event of defect, must be ordered through Apple Authorized Service Providers.
This motherboard does require removal of the processor's heat sink before memory installation in the SIMM slot adjacent to the processor can occur. Fortunately, the procedure is eminently simple, requiring the release of four retaining tabs sunk into small holes in the motherboard at each corner of the heat sink, which is readily identifiable due to its baroque appearance. Otherwise, it is advisable to avoid removing any insulating gels or other materials found between the processor and the heat sink, and it is highly recommended that the heat sink be replaced prior to completion of the procedure.
Specifications Logic Board RAM None Supported SIMMs 8MB, 16MB, 32MB. Number SIMM Slots Two (2). Supported VRAM 1MB non-upgradeable, DRAM frame buffer. Number VRAM Slots None. L2 Cache Supported 256k on proprietary Apple SIMM module. SIMM Type 72-pin, FPM 32-bit, 2k or 4k refresh, 80ns or faster.
While some of the products mentioned on this page may no longer be available, the information about these products remains available to those who may need it.
As noted, the 5300-series have no VRAM slots on the logic board, and no VRAM expansion beyond the 1MB soldered on the logic board is consequently feasible. It is possible, however, to install a dwindling variety of video cards into the LC-style PDS slot of these computers, which can afford access to higher resolutions, drive larger monitors, and generally enahance overall video performance.