Memory Module Specification
DESCRIPTION:
ValueRAM's KVR400S4R3AK2/1G is a kit of two 64M x 72-bit (512MB) DDR400 CL3
SDRAM (Synchronous DRAM) "single rank" Registered ECC memory modules. Total kit
capacity is 1GB (1024MB). The components on each module include eighteen 64M x 4-bit
(16M x 4-Bit x 4 bank) DDR400 SDRAM in FBGA packages. Each 184-pin DIMM uses gold
contact fingers and requires +2.6V. The electrical and mechanical specifications are as
follows:
FEATURES:
Clock Cycle Time (tCK) 5ns (min.) / 10ns (max.)
Row Cycle Time (tRC) 55ns (min.)
Refresh Row Cycle Time (tRFC) 70ns (min.)
Row Active Time (tRAS) 40ns (min.) / 70,000ns (max.)
Single Power Supply of +2.6V (+/- .1V)
Power 5.850 W (operating per module)
UL Rating 94 V - 0
Document No. VALUERAM0447-001.A00
06/22/05
KVR400S4R3AK2/1G
1GB (512MB 64M x 72-Bit x 2 pcs.) DDR400 CL3
Registered ECC 184-Pin DIMM Kit (2 pcs.)
Note: The module defined in this data sheet is one of several configurations available under this part number. While
all configurations are compatible, the DRAM combination and/or the module height may vary from what is described
here. However, in no configuration will the module height exceed 1.200" (30.48mm).
A B
5.25 ± 0.005
5.171
(131.350)
(133.350 ± 0.13)
(30.48)
1.2
5.077
(128.950)
0.393
(10.00)
0.100 Min
(2.50 Min)
(19.80)
0.78
(17.80)
0.7
R (2.00)
0.0787
(3.00)
0.118
(2.30 Min)
A B
0.157 Max
0.050 ± 0.0039
(1.270 ± 0.10)
(3.99 Max)
(4.00)
(0.157)
Figure 1: KVR400S4R3AK2/1G 184-Pin DIMM
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