Memory
4 MiB of RDRAM, used in parallel by the CPU, the RSP, the RDP and the I/O interfaces, so one pool serves everything a contemporary machine would have split between system and video memory.
provisional A figure marked provisional is recorded but not accepted: its evidence is unsettled. It may rely on one source, an unconfirmed announcement, or a digit read from a damaged scan. The reason appears under the figure. The catalog shows the figure but never uses it in a multiplier. How records are judged.
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Memory capacity memory | 4 MiB | Confirmed | Vendor-rated | Design capacity Stated by the vendor Main memory of the retail console, built from 9 bit RDRAMs. One pool shared by the CPU, the RSP, the RDP and the I/O interfaces. It is not comparable like for like with the PlayStation's 2 MiB of main memory, because that machine has a further 1 MiB of video memory the CPU cannot reach and this one does not separate the two. | |
| Memory bandwidth memory provisional | 500 MB/s | Confirmed | Theoretical | Theoretical peak Stated by the vendor The single RDRAM pool, which the manual states is used in parallel by the processor, the signal processor, the drawing processor and the I/O interfaces. Provisional, like the graphics clock on the same page and for the same reason: the bullet this is read from is the one whose own clock figure the scan destroys, so a legible number on an illegible line waits for a second source. Note also what the manual counts: "9 bit bytes at 500 M/sec". The ninth bit is not the programmer’s, so this is 500 million bytes per second of data on a bus carrying rather more than that. |
4 194 304 B
a + b + … sum v1 Adds 1 memory-capacity figure obtained by design-capacity. Nothing in the catalog is left out of it. A total is only as trustworthy as the decision about what belongs in it, so both the terms and the exclusions are named records.
500 000 000 B/s
a + b + … sum v1 Adds 1 memory-bandwidth figure obtained by theoretical-peak. Nothing in the catalog is left out of it. A total is only as trustworthy as the decision about what belongs in it, so both the terms and the exclusions are named records.
The ninth bit per byte is used by the graphics hardware rather than for parity. Because every engine contends for the same memory, capacity and bandwidth here are shared in a way the PlayStation's split main memory and VRAM are not.