Product comparison · 2 cpus

Dell Xeon E5645 vs Dell Xeon L5520

38specifications compared
15differ
23identical
10known for one product only

Key differences

Processor model
- Xeon E5645:E5645
- Xeon L5520:L5520
Processor base frequency
- Xeon E5645:2.4 GHz
- Xeon L5520:2.26 GHz
Processor cores
- Xeon E5645:6
- Xeon L5520:4
Processor lithography
- Xeon E5645:32 nm
- Xeon L5520:45 nm
Processor threads
- Xeon E5645:12
- Xeon L5520:8
Processor cache
- Xeon E5645:12 MB
- Xeon L5520:8 MB
Thermal Design Power (TDP)
- Xeon E5645:80 W
- Xeon L5520:60 W
VID Voltage Range
- Xeon E5645:0.75 - 1.35 V
- Xeon L5520:0.750 - 1.350 V

Side by side

Differences highlightedShow differences only

Comparison of Xeon E5645, Xeon L5520
48 specifications	A Dell Xeon E5645 View product	B Dell Xeon L5520 View product
Processor10 differ
Processor modelDiffers	E5645	L5520
Processor base frequencyDiffers	2.4 GHz	2.26 GHz
Processor coresDiffers	6	4
Processor lithographyDiffers	32 nm	45 nm
Processor threadsDiffers	12	8
Processor cacheDiffers	12 MB	8 MB
L3 cache speedKnown for one	Unknown — not stated by the source	2.26 GHz
Thermal Design Power (TDP)Differs	80 W	60 W
VID Voltage RangeDiffers	0.75 - 1.35 V	0.750 - 1.350 V
SteppingDiffers	B1	D0
CPU multiplier (bus/core ratio)Known for one	Unknown — not stated by the source	17
Memory bandwidth supported by processor (max)Differs	32 GB/s	25.6 GB/s
Processor boost frequencyKnown for one	2.67 GHz	Unknown — not stated by the source
Memory2 differ
Maximum internal memory supported by processorDiffers	288 GB	144 GB
Memory clock speeds supported by processorDiffers	800,1066,1333 MHz	800,1066 MHz
Features1 differ
Execute Disable BitDiffers	No	Yes
Number of Processing Die TransistorsKnown for one	Unknown — not stated by the source	731 M
Processing Die sizeKnown for one	Unknown — not stated by the source	263 mm²
Embedded options availableKnown for one	Unknown — not stated by the source	No
Physical Address Extension (PAE)Known for one	Unknown — not stated by the source	Yes
Supported instruction setsKnown for one	SSE4.2	Unknown — not stated by the source
Processor special features1 differ
Intel Trusted Execution TechnologyDiffers	Yes	No
Intel® AES New Instructions (Intel® AES-NI)Known for one	Yes	Unknown — not stated by the source
Intel® Turbo Boost TechnologyKnown for one	Yes	Unknown — not stated by the source
Operational conditions1 differ
TcaseDiffers	76.2 °C	70 °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.

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