Called the EV8 - and known in techspeak as the 21464 - this is a fifth generation of the Alpha processor family, and will be manufactured using a 0.13 micron process, running with a clock speed between 1.2 and 2Ghz. The EV8 uses a new CPU core, and delivers twice the performance of the EV7 (21364), which was announced at last year's forum, delivering twice the performance of the 1Ghz EV68 (21264).
Compaq vice-president and Alpha Processor technology general manager Jesse Lipcon says, on the single instruction stream benchmarks, the EV8 will deliver twice the performance per megahertz clock rate relative to EV68 and EV7. More importantly, the SMT allows for a performance improvement factor of two in real workloads and that is the main technology innovation.
SMT allows the processor to run up to four separate instruction streams or threads in parallel, using the same shared pool of eight integer and four floating-point execution units. To the software, this system appears as if it is a four-way SMP (symmetric multi-processing) system, but is actually a single CPU.