Editing DEC Alpha (section)

==Performance==
To illustrate the comparative performance of Alpha-based systems, some [[Standard Performance Evaluation Corporation]] (SPEC) performance numbers (SPECint95, SPECfp95) are listed below. Note that the SPEC results claim to report the measured performance of a whole computer system (CPU, bus, memory, compiler optimizer), not just the CPU. Also note that the benchmark and scale changed from 1992 to 1995. However, the figures give a rough impression of the performance of the Alpha architecture (64-bit), compared with the contemporary HP (64-bit) and Intel-based offerings (32-bit). Perhaps the most obvious trend is that while Intel could always get reasonably close to Alpha in integer performance, in floating-point performance the difference was considerable. On the other side, HP ([[PA-RISC]]) is also reasonably close to Alpha, but these CPUs are running at significantly lower clock rates (MHz). The tables lack two important values: the power consumption and the price of a CPU.

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{| class="wikitable" style="text-align:center; font-size:98%"
! width="150"| System
! width="80"| CPU
! width="30"| MHz
! width="40"| integer
! width="50"| floating point
|-
|+SPEC benchmark 1995 performance comparison (using ''SPECint95'' and ''SPECfp95'' results [http://www.spec.org/cpu95/results/])
|-
!AlphaServer 8400 5/350
|21164 (EV5)||350||10.1||14.2
|-
!Intel Alder System (200&nbsp;MHz, 256&nbsp;KB L2)  
|[[Pentium Pro]]||200||8.9||6.75
|-
![[HP 9000]] C160
|[[PA-8000]]||160||10.4||16.3
|-
|}
{{Col-2}}
{| class="wikitable" style="text-align:center; font-size:98%"
! width="150"| System
! width="80"| CPU
! width="30"| MHz
! width="40"| integer
! width="50"| floating point
|-
|+2000 performance comparison (using ''[[SPECint]]95'' and ''SPECfp95'' results)
|-
!AlphaServer ES40 6/833
|21264 (EV6)||833||50.0||100.0
|-
!Intel VC820 motherboard
|[[Pentium III]]||1000||46.8||31.9
|-
!HP 9000 C3600 
|[[PA-8600]]||552||42.1||64.0
|-
|}
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