PART NUMBER DECODER
The following information is designed to help you identify Kingston® HyperX® memory modules by specification.
GLOSSARY
Capacity
Total number of memory cells on a module expressed in Megabytes or Gigabytes.
For kits, listed capacity is the combined capacity of all modules in the kit.
CAS Latency
One of the most important latency (wait) delays (expressed in clock cycles) when data is accessed on a memory module. Once
the data read or write command and the row/column addresses are loaded, CAS Latency represents the final wait time until
the data is ready to be read or written.
DDR3
Third generation of Double Data Rate (DDR) SDRAM memory. Similar to DDR2, it is a continuing evolution of DDR memory
technology that delivers higher speeds (up to 1600MHz), lower power consumption and heat dissipation. It is an ideal
memory solution for bandwidth hungry systems equipped with dual and quad core processors and the lower power consumption
is a perfect match for both server and mobile platforms.
DDR2
Second-generation DDR memory technology. DDR2 memory modules are not backward-compatible with DDR due to lower voltage,
different pin configurations and incompatible memory chip technology.
Total Kit
A single package containing multiple memory modules: K2 = 2 modules in a kit.
Registered
A memory module containing Register chip(s) used to relay and synchronize address and control signals issued by the
motherboard's memory controller, and a Phase Locked Loop (PLL) chip used to relay the motherboard's clock signal to all
the DRAM chips.
Speed
The data rate or effective clock speed that a memory module supports.
LATENCY TIMING
The information below will help illustrate the appropriate settings when adjusting the memory timing's in the motherboard BIOS for optimum
performance. Please note that these settings may vary depending on motherboard make/model or BIOS update.
|
Abbreviation
|
Definition
|
What it does
|
|
CL
|
CAS Latency
|
Delay between activation of row and reading a row
|
|
tRCD
|
RAS to CAS
(or RAS to Column Delay)
|
Activates row
|
|
tRP/tRCP
|
Row Precharge Delay
(or RAS Precharge Delay)
|
Deactivates row
|
|
tRA/tRD/tRAS
|
Row Active Delay
(or RAS Active Delay, or time to ready)
|
Number of clock cycles and between activation/deactivation of row
|
|
CMD Rate
|
Command rate
|
Delay between chip select and command
|
Notice: All Kingston products are tested to meet our published specifications, Some systems or motherboard configurations may not
operate at the published HyperX memory speeds and timing settings. Kingston does not recommend that any user attempt to run their
computers faster than the published speed. Overclocking or modifying your system timing may result in damage to computer components.