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Double Data Rate 2 Synchronous Dynamic Random-Access Memory (DDR2 SDRAM) is a double data rate (DDR) synchronous dynamic random-access memory (SDRAM) interface. It is a JEDEC standard (JESD79-2); first published in September 2003. [2] DDR2 succeeded the original DDR SDRAM specification, and was itself succeeded by DDR3 SDRAM in 2007.
DDR2 started to be effective by the end of 2004, as modules with lower latencies became available. [19] Memory manufacturers stated that it was impractical to mass produce DDR1 memory with effective transfer rates in excess of 400 MHz (i.e. 400 MT/s and 200 MHz external clock) due to internal speed limitations.
Memory clock I/O bus clock Transfer rate Theoretical bandwidth DDR-200, PC-1600 100 MHz 100 MHz 200 MT/s 1.6 GB/s DDR-400, PC-3200 200 MHz 200 MHz 400 MT/s 3.2 GB/s DDR2-800, PC2-6400 200 MHz 400 MHz 800 MT/s 6.4 GB/s DDR3-1600, PC3-12800 200 MHz 800 MHz 1600 MT/s 12.8 GB/s DDR4-2400, PC4-19200 300 MHz 1200 MHz 2400 MT/s 19.2 GB/s
Supports 400/800 MHz FSB; Supports up to 4 GB of RAM with two 64-bit DDR2-667 DIMMs; Single-chip solution (no southbridge or V-Link required) Designed towards being used with the VIA Isaiah 64-bit processor. Maximum power consumption (TDP max) of 5 watts. VIA VX800U. Similar to the VIA VX800
Memory: 4 GB maximum, 2 slots DDR2, 1.8 volt unbuffered, asymmetric or interleaved operation supported. Intel specifies that the chipset only supports 533 to 667 MHz memory clock speed is supported however HP Pre-sales telephone support has stated twice that the motherboard supports 533 to 800 MHz memory.
Update on 945PL, supports 4 GB of memory. 946GZ (Lakeport-G) A version of 946PL with GMA 3000 graphics core. P965 (Broadwater) Update on 945P, no native PATA support, improved memory controller with support for DDR2 memory up to 800 MHz and official Core 2 Duo support. G965 (BroadwaterG)