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SPD is a small ROM or
EEPROM
timing and chip parameters. SPD can be used by
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Ultra DMA (or, more accurately, Ultra DMA/33) is a protocol for transferring data between a hard disk drive through the
computer's data path (or bus) to the computer's random access memory (RAM). The Ultra DMA/33 protocol transfers data in
burst mode at a rate of 33.3MB/s, twice as fast as the previous
developed as a proposed industry standard by the Quantum corporation, makes of hard disk drives, and Intel, makes of chipset
that support computer bus technology. Ultra DMA support in your computer means that it will boot (start) and open new
applications more quickly. It will help users of graphic-intensive and applications that require large amounts of access to data on
the hard disk drive. Ultra DMA uses Cyclical Redundancy Checking (CRC), offering a new level of data protection. Ultra DMA
uses the same 40-pin IDE interface cable as PIO and DMA.
16.6MB/s x2 = 33MB/s
16.6MB/s x4 = 66MB/s
16.6MB/s x6 = 100MB/s
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Compared to traditional USB 1.0/1.1 with the speed of 12Mbps, USB 2.0 has a fancy speed up to 480 Mbps that is 40 times
faster than the traditional one. Except for the speed increase, USB 2.0 supports old USB 1.0/1.1 software and peripherals,
offering impressive and even better compatibility to customers.
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device resided on the
DIMM
BIOS
to decide best timing for this DIMM or RIMM.
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or RIMM. SPD stores memory module information such as DRAM
Direct Access Memory (DMA)
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interface. Ultra DMA was
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