Side-by-Side Comparison
RAM
DDR vs. DDR5
Comparing 2 standards across 5 specifications. 5 key differences identified.
Comparing:
DDR
DDR5
DDR SDRAM (sometimes called DDR1), finalized by JEDEC in 2000, was the first double-data-rate memory standard -- transferring data on both the rising and falling edge of the clock signal. It used a 184-pin DIMM for desktops and a 200-pin SO-DIMM for laptops, running at 2.5V.
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
|
2000 (JESD79) | July 2020 |
|
DIMM Pins
|
184 | 288 (same count as DDR4 -- incompatible via on-module PMIC and different signaling) |
|
SO-DIMM Pins
|
200 | 262 |
|
Nominal Operating Voltage
|
2.5 (2.6V for DDR-400) V | 1.1 V |
|
Data Rate Range
|
200–400 (DDR-200 to DDR-400) MT/s | 4000–6400 (PC5-32000 to PC5-51200) MT/s |