64GB (2x32GB) DDR4 3200MHz (PC 26500) SO-DIMM Dual channel
Product Info
64GB (2x32GB) DDR4 3200MHz (PC 26500) SO-DIMM Dual channel
DDR4 is the newest iteration in DRAM, loaded with new features that improve
reliability, speed, power, and stacking capabilities for the enterprise,
micro-server, ultrathin, tablet markets, automotive and embedded
markets—industrial, consumer and connected home applications. With data rates
reaching 2400 Mb/s, DDR4 increases performance up to 50% over DDR3. DDR4 also
delivers a 20% reduction in voltage over DDR3—however, when DDR4’s additional
power-saving features are taken into account, total overall power savings versus
DDR3 can be as much as 35%. With DDR3 reaching its limits in a world that demands higher performance and
increased bandwidth, a new generation of DDR SDRAM has arrived. DDR4 delivers
higher performance, higher DIMM capacities, improved data integrity and lower
power consumption.
Achieving more than 2Gbps per pin and consuming less power than DDR3L (DDR3 Low
Voltage), DDR4 provides up to 50 percent increased performance and bandwidth
while decreasing the power consumption of your overall computing environment.
This represents a significant improvement over previous memory technologies and
a power savings up to 40 percent.
In addition to optimized performance and greener, low-cost computing, DDR4 also
provides cyclic redundancy checks (CRC) for improved data reliability, on-chip
parity detection for integrity verification of ‘command and address’ transfers
over a link, enhanced signal integrity and other robust RAS features.
Description
DDR3
DDR4
Advantage
Chip Densities
512Mb-8Gb
4Gb-16Gb
Larger DIMM Capacities
Data Rates
800Mb/s – 2133Mb/s
1600Mb/s – 3200Mb/s
Migration to Higher-Speed I/O
Voltage
1,5V
1,2V
Reduced Memory Power Demand
Low Voltage Standard
Yes (DDR3L at 1.35V)
Anticipated at 1.05V
Memory Power Reductions
Internal Banks
8
16
More Banks
Bank Groups (BG)
0
4
Faster Burst Accesses
VREF inputs
2 – DQs and CMD/ADDR
1 – CMD/ADDR
VREFDQ Now Internal
tCK – DLL Enabled
300MHz – 800MHz
667MHz – 1,6GHz
Higher Data Rates
tCK – DLL Disabled
10MHz – 125MHz (optional)
Undefined to 125MHz
DLL-off now fully supported
Read Latency
AL + CL
AL + CL
Expanded Values
Write Latency
AL + CWL
AL + CWL
Expanded Values
DQ Driver (ALT)
40 Ù
48 Ù
Optimal for PtP Applications
DQ Bus
SSTL15
POD12
Less I/O Noise and Power
RTT Values (in Ù)
120, 60, 40, 30, 20
240, 120, 80, 60, 48, 40, 34
Support for Higher Data Rates
RTT Not Allowed
READ Bursts
Disables during Read Bursts
Ease-of-Use
ODT Modes
Nominal, Dynamic
Nominal, Dynamic, Park
Add’l Control Mode; OTF Value Change
ODT Control
ODT Signaling Required
ODT Signaling NOT Required
Ease of ODT Control; Allows Non-ODT Routing, PtP Apps
Multi-Purpose Register
Four Registers – 1 Defined, 3 RFU
Four Registers – 3 Defined, 1 RFU
Provides Additional Specialty Readout
DIMM Types
RDIMM, LRDIMM, UDIMM, SODIMM
RDIMM, LRDIMM, UDIMM, SODIMM
DIMM Pins
240 (R, LR, U); 204 (SODIMM)
288 (R, LR, U); 260 (SODIMM)
RAS
ECC
CRC, Parity, Addressability, GDM
More RAS features; improved data integrity