(6x86) IBM and Cyrix's sixth-generation, 64-bit 80x86-compatible microprocessor. The 6x86 combines aspects of both RISC and CISC. It has a superscalar, superpipelined core, and performs register renaming, speculative execution, out-of-order completion, and data dependency removal. It has a 16-kilobyte primary cache and is socket-compatible with the Pentium P54C. It has four performance levels: PR 120+, PR 150+, PR 166+ and PR 200+.
The architecture of the 6x86 is more advanced than that of the Pentium, incorporating some of the features of Intel's Pentium Pro. At a given clock rate it executes most code more quickly than a Pentium would. However, its FPU is considerably less efficient than Intel's.