Side-by-Side Comparison
RAM
DDR2 vs. DDR5
Comparing 2 standards across 5 specifications. 5 key differences identified.
Comparing:
DDR2
DDR5
DDR2, standardized by JEDEC in September 2003, doubled DDR's internal prefetch to 4 bits and dropped operating voltage to 1.8V. Its 240-pin DIMM introduced a new pin count, but its 200-pin SO-DIMM confusingly matches DDR1's pin count -- the two are still incompatible via a different notch position.
DDR5, released by JEDEC in July 2020, splits each memory module into two independent 32-bit subchannels instead of DDR4's single 64-bit channel, and moves voltage regulation onto the module itself via an on-board PMIC rather than relying on the motherboard. Standard data rates start at 4000 MT/s, well above DDR4's ceiling.
Specification Comparison Table
5 Parameters| Parameter / Spec | ||
|---|---|---|
|
JEDEC Standard
|
September 2003 | July 2020 |
|
DIMM Pins
|
240 | 288 (same count as DDR4 -- incompatible via on-module PMIC and different signaling) |
|
SO-DIMM Pins
|
200 (same count as DDR1, different notch position -- not compatible) | 262 |
|
Nominal Operating Voltage
|
1.8 V | 1.1 V |
|
Data Rate Range
|
400–1066 (DDR2-400 to DDR2-1066) MT/s | 4000–6400 (PC5-32000 to PC5-51200) MT/s |