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1-2 AlphaServer DS20L User’s Guide
Table 1-1 AlphaServer DS20L Product Features (continued)
Feature Description
Main Memory
Up to eight 168-pin dual inline memory modules (DIMMs);
Min 512 MB, Max 2 GB.
Supports phase locked loop (PLL) or register-based
synchronous direct random access memory (SDRAM) serial
presence detect (SPD) modules of 128 MB, and 256 MB.
Low-voltage transistor/transistor logic (LVTTL) compatible
memory I/O.
Cache External L2 cache with 128-bit data path supports:
4MB cache per processor, DDR SRAMs.
Chipset
21272 (Tsunami) - One Cchip, four Dchips, and two Pchips
provide the following:
Maximum 166 MHz system bus with double data rate
(DDR) transfers, maximum bandwidth of 2.67
Gbytes/second.
One 256-bit memory bus.
Two 64-bit, 33 MHz PCI buses.
Power
425 W DC PSU: (+)12Vdc and standby (+)5Vdc. Supplies all
integrated devices and up to 10A to PCI slots (25W) and 2A
to internal disk drive (25W).
Network Controller Dual 10/100 fast Ethernet network controllers.
Expansion Two 2/3 length 64-bit PCI slots; 33 MHz.