Product comparison · 2 cpus

HP Intel Xeon E5645 vs HP Intel Xeon L3406

39specifications compared
18differ
21identical
12known for one product only

Key differences

The HP Intel Xeon E5645 has 0.14 GHz more processor base frequency than the HP Intel Xeon L3406 (2.4 GHz vs 2.26 GHz). The HP Intel Xeon E5645 has 4 more processor cores than the HP Intel Xeon L3406 (6 vs 2). The HP Intel Xeon E5645 has 8 more processor threads than the HP Intel Xeon L3406 (12 vs 4). Only the HP Intel Xeon E5645 has embedded options available. Only the HP Intel Xeon E5645 has Intel® AES New Instructions (Intel® AES-NI).

Processor family
- Intel Xeon E5645:Intel® Xeon® 5000 Sequence
- Intel Xeon L3406:Intel® Xeon® 3000 Sequence
Processor model
- Intel Xeon E5645:E5645
- Intel Xeon L3406:L3406
Processor base frequency
- Intel Xeon E5645:2.4 GHz
- Intel Xeon L3406:2.26 GHz
Processor cores
- Intel Xeon E5645:6
- Intel Xeon L3406:2
Processor socket
- Intel Xeon E5645:Socket B (LGA 1366)
- Intel Xeon L3406:LGA 1156 (Socket H)
Processor threads
- Intel Xeon E5645:12
- Intel Xeon L3406:4
System bus rate
- Intel Xeon E5645:5.86 GT/s
- Intel Xeon L3406:2.5 GT/s
Processor boost frequency
- Intel Xeon E5645:2.67 GHz
- Intel Xeon L3406:2.53 GHz

Side by side

Differences highlightedShow differences only

Comparison of Intel Xeon E5645, Intel Xeon L3406
51 specifications	A HP Intel Xeon E5645 View product	B HP Intel Xeon L3406 View product
Processor13 differ
Processor familyDiffers	Intel® Xeon® 5000 Sequence	Intel® Xeon® 3000 Sequence
Processor modelDiffers	E5645	L3406
Processor base frequencyDiffers	2.4 GHz	2.26 GHz
Processor coresDiffers	6	2
Processor socketDiffers	Socket B (LGA 1366)	LGA 1156 (Socket H)
Processor threadsDiffers	12	4
System bus rateDiffers	5.86 GT/s	2.5 GT/s
Processor boost frequencyDiffers	2.67 GHz	2.53 GHz
Processor cacheDiffers	12 MB	4 MB
Thermal Design Power (TDP)Differs	90 W	30 W
VID Voltage RangeDiffers	0.75 - 1.35 V	0.65 - 1.4 V
Bus typeDiffers	QPI	DMI
Memory bandwidth supported by processor (max)Differs	32 GB/s	17 GB/s
SteppingKnown for one	B1	Unknown — not stated by the source
Number of QPI linksKnown for one	2	Unknown — not stated by the source
Memory2 differ
Memory clock speeds supported by processorDiffers	800,1066,1333 MHz	1066 MHz
Memory channelsDiffers	Triple-channel	Dual-channel
Features1 differ
Maximum number of PCI Express lanesKnown for one	Unknown — not stated by the source	1
PCI Express slots versionKnown for one	Unknown — not stated by the source	2.0
PCI Express configurationsKnown for one	Unknown — not stated by the source	1x16, 2x8
Number of Processing Die TransistorsKnown for one	Unknown — not stated by the source	382 M
Processing Die sizeKnown for one	Unknown — not stated by the source	81 mm²
Number of Graphics & IMC Die TransistorsKnown for one	Unknown — not stated by the source	177 M
Graphics & IMC Die SizeKnown for one	Unknown — not stated by the source	114 mm²
Embedded options availableDiffers	Yes	No
Graphics & IMC lithographyKnown for one	Unknown — not stated by the source	45 nm
Supported instruction setsKnown for one	SSE4.2	Unknown — not stated by the source
Processor special features1 differ
Intel® AES New Instructions (Intel® AES-NI)Differs	Yes	No
Intel® vPro™ Platform EligibilityKnown for one	Unknown — not stated by the source	No
Operational conditions1 differ
TcaseDiffers	76.2 °C	53.9 °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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