HYS72T256020GR-37-A modules equivalent, ddr2 registered memory modules.
DQ63 VSS VDDSPD SA0 SA1
1.6 Pin Locations
Front
p in 1 pin 1 21
64 18 4
65 1 85.
* One rank 64Mb x 72, 128Mb x 72 and two ranks 128Mb × 72 and 256Mb x 72 organizations
* JEDEC standard Double D.
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