We proceed with the series of articles devoted to the low level analysis of the most important characteristics of memory modules using the RightMark Memory Analyzer test package. The object of our next analysis is a couple of colored Kingmax DDR-466 modules of the high-performance hardcore series with stylish original design.

Manufacturer Information

Module manufacturer: Kingmax Inc.
Chip manufacturer: Kingmax Inc.
Web site of the module manufacturer: http://www.kingmax.com/product/color.htm
Web site of the chip manufacturer: N/A

Module Appearance

Photo of the memory module

Photo of the memory chip

Part Numbering System of Modules and Chips

Module Part Number Expansion

Data sheet on Kingmax DDR-466 does not contain information about the expansion of some part numbers of the modules. The documentation provides only brief technical characteristics pertaining to some part numbers. The characteristics of the module under review are provided below.

SPD module chip data

Description of the SPD general standard:
JEDEC Standard No. 21-C, 4.1.2 - SERIAL PRESENCE DETECT STANDARD, General Standard

Description of the SPD specific standard for DDR:
JEDEC Standard No. 21-C, 4.1.2.4 – Appendix D, Rev. 1.0: SPD’s for DDR SDRAM

SPD chip contents look not quite standard. Supported CAS# Latency values – 3.0 and 3.0. The first value (CL X = 3.0) corresponds to the non-standard cycle time – 4.3 ns (nevertheless, it matches the value claimed in Kingmax specification), that is the module operates at about 233 MHz (DDR-466). Timing scheme for this case can be expressed as 3.0-4.2-4.2-9.3, in reality (taking into account that t_RCD, t_RP and t_RAS cannot take non-integral values) – 3.0-4-4-9 (which again matches the values provided above in the part number expansion). The second value of CAS# latency (CL X-0.5 = 2.5) corresponds to the standard (for DDR-400) cycle time of 5.0 ns. Timing scheme in the second case is written as 2.5-3.6-3.6-8 (in reality – 2.5-4-4-8).

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