Цитата(v_mirgorodsky @ Jul 14 2007, 18:33)

Чем отличаются памяти DDR стандарта и памяти стандарта DDR2 кроме стандарта выходного напряжения и рабочей частоты?...
Судите сами:
"DDR2 SDRAM is the second generation of DDR SDRAM. It offers data rates of up to 6.4 GBytes/s,
lower power consumption, and improvements in packaging.
It achieves this higher level of performance and power consumption through faster clocks,
1.8V operation and signaling, and a simplified command set.
Код
Feature DDR Mobile DDR DDR2
Data Transfer Rate 266,333,400 MHz 200,250,266,333 MHz 400,533,667,800 MHz
Operating Voltage 2.5 V 1.8 V 1.8 V
Densities 128Mb - 1Gb 128Mb - 512Mb, (1GB) 256Mb-4Gb
Internal Banks 4 4 4 and 8
Prefetch 2 2 4
CAS Latency 2, 2.5, 3 2, 3 3, 4, 5, 6
Additive Latency no no 0, 1, 2, 3, 4, 5
READ Latency CAS Latency CAS Latency Additive Latency + CAS Latency
WRITE Latency Fixed = 1 cycle Fixed = 1 cycle READ Latency - 1 cycle
I/O width x4, x8, x16 x4, x8, x16, x32 x4, x8, x16
On-Die Termination no no Selectable
Off Chip Driver no no yes
Burst Length 2, 4, 8 2, 4, 8, 16, full page 4, 8
Burst Terminate Command yes yes no
Partial Array Self-Refresh no Full,1/2,1/4,1/8,1/16 no
Temper. Compens. Self-Refresh no supported no
Deep Power-Down no supported no
It should be noted that DDR is not compatible with a conventional SDRAM interface,
and DDR2 is not compatible with DDR. However, DDR2 is planned to be
forward-compatible with next-genetation DDR technology." См.
EMP