Product comparison · 2 cpus

Lenovo Intel Xeon E5645 vs Lenovo Intel Xeon L5638

Key differences

Processor model
- Intel Xeon E5645:E5645
- Intel Xeon L5638:L5638
Processor base frequency
- Intel Xeon E5645:2.4 GHz
- Intel Xeon L5638:2 GHz
Thermal Design Power (TDP)
- Intel Xeon E5645:80 W
- Intel Xeon L5638:60 W
VID Voltage Range
- Intel Xeon E5645:0.750 - 1.350 V
- Intel Xeon L5638:1 - 1.5 V
Maximum operating temperature
- Intel Xeon E5645:76.2 °C
- Intel Xeon L5638:85 °C

Differences highlightedShow differences only

Comparison of Intel Xeon E5645, Intel Xeon L5638
22 specifications	A Lenovo Intel Xeon E5645 View product	B Lenovo Intel Xeon L5638 View product
Processor4 differ
Processor family	Intel® Xeon® 5000 Sequence	Intel® Xeon® 5000 Sequence
Processor modelDiffers	E5645	L5638
Processor base frequencyDiffers	2.4 GHz	2 GHz
Processor cores	6	6
Processor socket	Socket B (LGA 1366)	Socket B (LGA 1366)
Processor lithography	32 nm	32 nm
Component for	Server/workstation	Server/workstation
Processor threads	12	12
System bus rate	5.86 GT/s	5.86 GT/s
Processor operating modes	64-bit	64-bit
Processor cacheKnown for one	12 MB	Unknown — not stated by the source
Processor cache typeKnown for one	L3	Unknown — not stated by the source
Processor front side bus	1333 MHz	1333 MHz
Thermal Design Power (TDP)Differs	80 W	60 W
VID Voltage RangeDiffers	0.750 - 1.350 V	1 - 1.5 V
SteppingKnown for one	B1	Unknown — not stated by the source
CPU multiplier (bus/core ratio)Known for one	18	Unknown — not stated by the source
Processor codeKnown for one	SLBWZ	Unknown — not stated by the source
Processor boost frequencyKnown for one	Unknown — not stated by the source	2.4 GHz
Featuresidentical
Market segment	Server	Server
BandwidthKnown for one	32768 MB/s	Unknown — not stated by the source
Operational conditions1 differ
Maximum operating temperatureDiffers	76.2 °C	85 °C

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.