MSI MS 6378 User Guide - Page 17
Memory - ram
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Hardware Setup Memory The mainboard provides 2 sockets for 168-pin unbuffered SDRAM DIMM (Double In-Line Memory Module) modules and supports the memory size up to 1 GB. The socket supports 256MB technology. DIMM Slots (DIMM 1~2) Introduction to SDRAM Synchronous DRAM (SDRAM) is a type of dynamic RAM memory chip that has been widely used starting in the latter part of the 1990s. 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. SDRAM provides 800 MBps or 1 GBps data transfer depending on whether the bus is 100MHz or 133MHz. 2-5