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The Namco System 246 is a development of the Sony PlayStation 2 technology as a basis for an arcade system board. It was released in December 2000 on its first game Bloody Roar 3. Like the Sega NAOMI, it is widely licensed for use by other manufacturers. Games such as Battle Gear 3 and Capcom Fighting Evolution are examples of System 246-based arcade games that are not Namco products.
- Main CPU: MIPS III R5900-based "Emotion Engine", 64-bit RISC operating at 294.912 MHz (Overclocking to 299 MHz on System 256), with 128-bit SIMD capabilities
- Sub CPU: MIPS II R3000A IOP with cache at 33.8688 MHz (Unlike the PSXCPU)
- System memory: 32 MB RIMM 3200 32-bit dual-channel (2x 16-bit) RDRAM (Direct Rambus DRAM) @ 400 MHz, 3.2 GB/s peak bandwidth
- Graphics: "Graphics Synthesizer" operating at 147.456 MHz
- Graphics memory: 4MB eDRAM (8MB on System 256)
- Sound: "SPU1+SPU2"
- Media: CD-ROM, DVD-ROM, Hard Disk Drive, 64 MBit 3.3V NAND FlashROM Security Dongle
Namco System 256 is an upgraded version of System 246 but the upgrades are unknown (more VRAM and faster CPU speeds likely).
Namco Super System 256 is the same as regular Namco System 256 but it has the gun board integrated, though this variant was only used in Time Crisis 4.
Namco System 147 is similar to 246 but does not use a DVD-ROM drive, instead it has ROM chips on the system board.