Memory
16 MiB of SDRAM connected directly to the SH-4 across a 64 bit bus at 100 MHz, holding game state and the display lists the graphics chip reads.
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Memory capacity memory | 16 MiB | Confirmed | Vendor-rated | Design capacity Stated by the vendor Base system space. SDRAM directly connected to the SH-4 on a 64 bit bus. Main memory only. The console has a further 8 MiB of texture memory and 2 MiB of audio memory that this figure excludes, and the specification states outright that the SH-4 does not share texture or audio data with main memory. | |
| Memory bandwidth memory | 800 MB/s | Confirmed | Theoretical | Theoretical peak Stated by the vendor Maximum burst transfer on the 64 bit main-memory bus at 100 MHz. The specification calls it a theoretical value. A bus ceiling, not a measured throughput, and the source says so in as many words. It describes main memory only; texture and audio memory have their own paths. |
16 777 216 B
a + b + … sum v1 Adds 1 memory-capacity figure obtained by design-capacity. Left out: 8 MiB (attached to the graphics processor rather than to the CPU); 2 MiB (the sound processor’s own store, reachable only across the peripheral bus). A total is only as trustworthy as the decision about what belongs in it, so both the terms and the exclusions are named records.
800 000 000 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.
Explicitly not shared with texture or audio data. Development hardware could carry 32 MiB; the retail figure is 16.