SDRAM (Synchronous DRAM) is the common term to classify PC66, PC100 and PC133 SDRAM memory modules. SDRAMs are based on standard dynamic RAM chips, but have sophisticated features that make them considerably faster. First, SDRAM chips are fast enough to be synchronized with the CPU's clock, which eliminates wait states.
Second, the SDRAM chip is divided into two cell blocks, and data is interleaved between the two so that while a bit in one block is being accessed, the bit in the other is being prepared for access. This allows SDRAM to burst the second and subsequent, contiguous characters at a rate of 10ns, compared to 60ns for the first character.
- Speeds: PC66, PC100, PC133 - Capacities: 64MB to 1GB - Available in 168 pin DIMM and 144 pin SO-DIMMs - ECC or non-ECC, Unbuffered and Registered SDRAM Modules
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