DDR1 Legacy
Compare 1 DDR1 Legacy parts from manufacturers including Kingston, with live price tracking and alerts.
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Filter in catalog →Frequently asked questions
What is PC2100 and DDR-266?
PC2100 is a memory specification meaning 2100 MB/s bandwidth at 266MHz clock speed. DDR-266 refers to the 266MHz operating frequency of this DDR1 module.
Will Kingston DDR-266 work in modern computers?
No. DDR1 is physically and electrically incompatible with DDR2, DDR3, DDR4, and DDR5 slots. It only works in systems designed for DDR1 from 2001-2004.
What motherboards support this memory?
Kingston DDR-266 supports Intel Pentium 4 (Socket 423/478), AMD Athlon XP (Socket 462), and equivalent chipset boards like Intel 845/865 and AMD nForce.
Is this a single 512MB module or two modules?
This is a kit with two 256MB DIMM modules that combine for 512MB total. Both modules may be installed in separate slots for dual-channel operation if supported.
Can I buy Kingston DDR-266 new?
No. Kingston discontinued DDR1 production in the mid-2000s. Only used and vintage modules are available through secondary markets and vintage computer sellers.
What voltage does DDR1 PC2100 require?
Kingston DDR-266 operates at 2.5V standard DDR1 voltage, different from later DDR generations.