Product comparison · 2 memory modules

Lenovo 128MB DDR SDRAM UDIMM vs Lenovo 256MB SDRAM SODIMM UPG

Key differences

Memory form factor
- 128MB DDR SDRAM UDIMM:184-pin DIMM
- 256MB SDRAM SODIMM UPG:144-pin SO-DIMM
Memory clock speed
- 128MB DDR SDRAM UDIMM:266 MHz
- 256MB SDRAM SODIMM UPG:100 MHz
Operating temperature (T-T)
- 128MB DDR SDRAM UDIMM:0 - 65 °C
- 256MB SDRAM SODIMM UPG:10 - 35 °C
Operating relative humidity (H-H)
- 128MB DDR SDRAM UDIMM:10 - 90%
- 256MB SDRAM SODIMM UPG:10 - 80%
Width
- 128MB DDR SDRAM UDIMM:133.4 mm
- 256MB SDRAM SODIMM UPG:67.6 mm
Depth
- 128MB DDR SDRAM UDIMM:35.7 mm
- 256MB SDRAM SODIMM UPG:25.4 mm
Height
- 128MB DDR SDRAM UDIMM:3.8 mm
- 256MB SDRAM SODIMM UPG:4 mm

Differences highlightedShow differences only

Comparison of 128MB DDR SDRAM UDIMM, 256MB SDRAM SODIMM UPG
14 specifications	A Lenovo 128MB DDR SDRAM UDIMM View product	B Lenovo 256MB SDRAM SODIMM UPG View product
Features2 differ
Internal memory typeKnown for one	DDR	Unknown — not stated by the source
Memory form factorDiffers	184-pin DIMM	144-pin SO-DIMM
ECC	Yes	Yes
CAS latencyKnown for one	2.5	Unknown — not stated by the source
Memory clock speedDiffers	266 MHz	100 MHz
Internal memoryKnown for one	Unknown — not stated by the source	0.25 GB
Lead platingKnown for one	Unknown — not stated by the source	Gold
Operational conditions2 differ
Operating temperature (T-T)Differs	0 - 65 °C	10 - 35 °C
Operating relative humidity (H-H)Differs	10 - 90%	10 - 80%
Weight & dimensions3 differ
WidthDiffers	133.4 mm	67.6 mm
DepthDiffers	35.7 mm	25.4 mm
HeightDiffers	3.8 mm	4 mm
Other featuresidentical
Supported data transfer ratesKnown for one	Up to 2,100 MBps	Unknown — not stated by the source
Special featuresKnown for one	Unknown — not stated by the source	Authenticity Seal, Tamper evident carton seal

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.