Product comparison · 2 memory modules

HyperX 4GB DDR3L-1866 vs Kingston Technology System Specific Memory KFJ9900ES/2G memory module

Key differences

Internal memory
- 4GB DDR3L-1866:4 GB
- System Specific Memory KFJ9900ES/2G memory module:2 GB
Memory layout (modules x size)
- 4GB DDR3L-1866:1 x 4 GB
- System Specific Memory KFJ9900ES/2G memory module:1 x 2 GB
Internal memory type
- 4GB DDR3L-1866:DDR3L
- System Specific Memory KFJ9900ES/2G memory module:DDR3
Memory form factor
- 4GB DDR3L-1866:204-pin SO-DIMM
- System Specific Memory KFJ9900ES/2G memory module:240-pin DIMM
ECC
- 4GB DDR3L-1866:No
- System Specific Memory KFJ9900ES/2G memory module:Yes
CAS latency
- 4GB DDR3L-1866:11
- System Specific Memory KFJ9900ES/2G memory module:9
Memory bus
- 4GB DDR3L-1866:64 bit
- System Specific Memory KFJ9900ES/2G memory module:72 bit
Memory voltage
- 4GB DDR3L-1866:1.35 V
- System Specific Memory KFJ9900ES/2G memory module:1.5 V

Differences highlightedShow differences only

Comparison of 4GB DDR3L-1866, KFJ9900ES/2G
26 specifications	A HyperX 4GB DDR3L-1866 View product	B Kingston Technology System Specific Memory KFJ9900ES/2G memory module Model KFJ9900ES/2G View product
Features9 differ
Internal memoryDiffers	4 GB	2 GB
Memory layout (modules x size)Differs	1 x 4 GB	1 x 2 GB
Internal memory typeDiffers	DDR3L	DDR3
Component forKnown for one	Laptop	Unknown — not stated by the source
Memory form factorDiffers	204-pin SO-DIMM	240-pin DIMM
ECCDiffers	No	Yes
CAS latencyDiffers	11	9
Memory clock speedKnown for one	1866 MHz	Unknown — not stated by the source
Memory busDiffers	64 bit	72 bit
Memory voltageDiffers	1.35 V	1.5 V
Module configurationDiffers	512M x 64	256M X 72
Row cycle timeKnown for one	44.7 ns	Unknown — not stated by the source
Refresh row cycle timeKnown for one	260 ns	Unknown — not stated by the source
Memory rankingKnown for one	Unknown — not stated by the source	1
Operational conditionsidentical
Operating temperature (T-T)Known for one	0 - 85 °C	Unknown — not stated by the source
Storage temperature (T-T)Known for one	-55 - 100 °C	Unknown — not stated by the source
Weight & dimensionsidentical
WidthKnown for one	67.6 mm	Unknown — not stated by the source
HeightKnown for one	30 mm	Unknown — not stated by the source
Other features4 differ
Bus clock rateDiffers	1866 MHz	1333 MHz
Error indicationDiffers	No	ECC
Internal memoryDiffers	4096 MB	2048 MB
Memory layoutDiffers	1 x 4096 MB	1 x 2048 MB
Chips organisationKnown for one	Unknown — not stated by the source	X8
Form factorKnown for one	Unknown — not stated by the source	240-pin DIMM

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.