The RS64 or Apache was introduced in 1997. It was developed from "Cobra" and "Muskie" but included a more complete PowerPC ISA and was therefore set to be used in RS/6000 machines as well as in AS/400 systems. It featured 128 KB total on-die L1 cache, 4 MB full speed off-chip L2 on a 128 bit bus, and a clock of 125 MHz. It scaled to a 12 processor SMP configuration in IBM's machines.
RS64 was called A35 in AS/400 and was one time referred to as the PowerPC 625, between the defunct PowerPC 620 and the PowerPC 630 (later renamed POWER3).
It was manufactured with a BiCMOS fabrication process.
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