GCN Insider | RAM on!

Trends & technologies that affect the way government does IT

DDR2 memory modules

If you're a system administrator, we bet you have a box of old Random Access Memory modules. Well, make some room for 184-pin DDR modules as well. Just as the original Double Data Rate memory replaced the standard SDRAM chips, so too will DDR2 modules replace DDRs.


Although DDR2 has been out for a while, it is no longer aimed at early adopters. 'DDR2 is now becoming the mainstream [dynamic] RAM,' said Craig Stice, product marketing manager for memory manufacturer Micron Technology Inc. of Boise, Idaho. A quick check on CDW-G's Web site finds that Crucial 256MB DDR modules cost (at press time) $42.88 each, while a Crucial 256MB DDR2 module runs just $46.87.


The new DDR2 modules have 240 pins, making them incompatible with first-generation DDRs. New computers have already started coming with DDR2 rather than DDR slots.
DDR2s can come in modules as large as 2GB, raising the possibility of installing 8GB or even 16GB of RAM per machine. Intel Corp. has already added support for DDR2 in most of its chipsets and Advanced Micro Devices Inc. will incorporate DDR2 throughout its REV F Opteron platform being introduced this fall, the Sunnyvale, Calif.-based company said.


'We're essentially fetching twice as much data per clock cycle,' Stice said. DDR2 also ups the data rate to as much as 667 MHz from DDR's 400 MHz, while actually cutting voltage requirements.


About the Authors


Joab Jackson is the senior technology editor for Government Computer News.

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