Chapter 2 Specification Summary 2-3
Sockets for memory 8 sockets, 2 min. populated with DIMMs of identical
capacity. Pairs of different size auto configured, accepted
DIMM modules DRAM, EDO, Inputs Buffered except RAS,
3.3V, 60nS, 72bits, 168 Pins
10-bit column address up to 128 MB
11-bit column address up to 128 MB
Caution – Use 60 ns DIMMs only on the Ultra AXi motherboard.
Refresh Rate CAS before RAS, 2K rows refreshed in 32 ms, (15.5 µs)
ECC features Single bit error correction
Double bit error detection
Height Enclosure restriction may apply
Note – Some standard ATX chassis have height restrictions
Width The connectors are 0.297 inches (7.544 mm.) wide.
A module thicker than this will partially block the
adjacent connector
Other References See A.3.2 on page A-9, TABLE C-4 on page C-18 and
TABLE C-5 on page C-20
2.1.3 UPA64S Interface (Optional FFB)
SunExpress Part Number X3663A
Interface connector UPA64S, J0601, see A.3.5 on page A-15
Functional specification Refer to Data sheet PN 270-4172-02
Monitor supported Sun Monitor, 13W3 connector
Note – The optional FFB card will block access to one PCI slot.
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