User`s manual

1.2 Board Components and Features
Table 1–2 Alpha PCI 64–275 Summary
Characteristic Description
Operating Systems
Supported operating
systems
Microsoft Windows NT
Board Characteristics
CPU and clock speed Alpha 21064A at 275 MHz
Instruction issue Up to 2 instructions issued per clock cycle
Word size 64 bits
Address size 34-bit physical address, 43-bit virtual address
Floating-point format VAX (F and G) and IEEE (S and T) data types
Memory (DRAM)
1
Minimum DRAM 16MB plus parity
Maximum DRAM 512MB plus parity
Memory (ROM) 1MB flash ROM
External L2 cache Configurable for 512KB, 2MB (default), 8MB (128-bit data)
Memory bus width 128 bits plus parity
Performance metrics
Cache SPECint92 SPECfp92
512KB @15 ns 176 217
2MB @12 ns
(default)
193 259
2MB @8 ns 205 272
1
Minimum DRAM required:
16MB for Microsoft Windows NT
32MB for Digital UNIX
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1–8 Alpha PCI 64–275 Introduction