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The i-RAM is a solid-state storage device produced by Gigabyte and released in June 2005.〔(AnandTech: Gigabyte's i-RAM: Affordable Solid State Storage )〕 It has four DDR RAM DIMM slots, and a connection via a SATA port enables a PC to see the i-RAM as a hard disk drive, which can also be made bootable. The SATA interface limits available bandwidth to a maximum sustained throughput of 150 MB/s, but allows a latency of 0.1 ms. As the DRAM is a volatile memory, an integrated battery allows the contents of DRAM to be preserved for a limited amount of time after the device's power supply is interrupted. ==Features== The I-Ram has the advantages of fast transfer rate and access time, no moving parts, a lower cost than traditional solid-state drives, unlimited write cycles compared to flash memory and it doesn't slow down over time. However, it has the disadvantages of high cost compared to traditional hard drives, low capacity (4 GiB maximum), the transfer rate restricted by SATA 150 bus (1.5 Gbit/s), it is not physically compatible with all double-sided DDR RAM modules using heat spreaders due to tight spacing,〔(Gigabyte's i-RAM storage device - The Tech Report - Page 1 )〕 power loss causes data loss the battery can fail, potentially difficult to find a replacement battery, adding memory wipes data from all modules and no ECC support. The i-RAM is bottlenecked by the SATA interface, which limits bandwidth to a maximum sustained throughput of 150 MB/s. This speed limitation is offset by near instant access, with a latency of 0.1 ms. DRAM is volatile, so power loss will cause data loss. The i-RAM is installed in a PCI slot, which powers it while the PC is plugged in (using standby power if the PC is off). It has a backup battery (10 to 16 hours depending on the configuration), which operates when the PC is not connected to AC mains power. The i-RAM supports Unbuffered/Non-ECC DDR 200/266/333/400 MHz RAM modules of different capacities (up to 1 GiB), speeds, and brands for a maximum capacity of 4 GiB. Because of this, cost per GB is high, but the device offers a non-mechanical storage method with higher performance than a traditional hard drive. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「I-RAM」の詳細全文を読む スポンサード リンク
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