Chihiro Arcade Board

Chihiro (also known as Sega Chihiro) is an arcade system board developed and used by Sega for a variety of high-end arcade releases in the early-to-mid 2000's. Originally released in 2002 with The House of the Dead III, Chihiro is a successor to the NAOMI series of boards and is based on Microsoft's Xbox console. It is Sega's last arcade board to be based on a particular console, with each successor (starting with Lindbergh) based on traditional PC architecture.

As it is based on the Xbox architecture, it utilizes an Intel Pentium III model for its CPU (at 733 MHz) and a NVIDIA GeForce 3 series variant for its GPU. It uses 128 MB of DDR-200 RAM for shared memory, which doubles the RAM used for the standard Xbox. It uses the same sort of GD-ROM discs used by the NAOMI and Triforce hardware, which are copied whole to the RAM before the game starts (preventing disc loading times). Some games were also distributed as Compact Flash cards or as CD-ROM/DVD-ROM discs.