Side-by-Side Comparison
RAM
DDR vs. DDR4
Comparing 2 standards across 5 specifications. 5 key differences identified.
Comparing:
DDR
DDR4
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.
DDR4's spec was finalized in September 2012, though it didn't reach the commercial market until 2014. It moved to a 288-pin DIMM and 260-pin SO-DIMM, dropped voltage to 1.2V, and started at a minimum of 2133 MT/s -- roughly double DDR3's starting point.
Specification Comparison Table
5 Parameters| Parameter / Spec | ||
|---|---|---|
|
JEDEC Standard
|
2000 (JESD79) | September 2012 (spec); 2014 (commercial market) |
|
DIMM Pins
|
184 | 288 |
|
SO-DIMM Pins
|
200 | 260 |
|
Nominal Operating Voltage
|
2.5 (2.6V for DDR-400) V | 1.2 V |
|
Data Rate Range
|
200–400 (DDR-200 to DDR-400) MT/s | 1600–3200 (JEDEC); commercially up to ~4800 overclocked MT/s |