Product comparison · 2 cpus

HP Intel Xeon E5645, Ref vs HP Intel Xeon X5660, Ref

41specifications compared
7differ
34identical
5known for one product only

Key differences

The HP Intel Xeon X5660, Ref has 0.4 GHz more processor base frequency than the HP Intel Xeon E5645, Ref (2.8 GHz vs 2.4 GHz). The HP Intel Xeon X5660, Ref has 0.54 GT/s more system bus rate than the HP Intel Xeon E5645, Ref (6.4 GT/s vs 5.86 GT/s). The HP Intel Xeon X5660, Ref has 0.53 GHz more processor boost frequency than the HP Intel Xeon E5645, Ref (3.2 GHz vs 2.67 GHz). Only the HP Intel Xeon E5645, Ref has embedded options available. Processor model: E5645 on the HP Intel Xeon E5645, Ref, X5660 on the HP Intel Xeon X5660, Ref.

Processor model
- Intel Xeon E5645, Ref:E5645
- Intel Xeon X5660, Ref:X5660
Processor base frequency
- Intel Xeon E5645, Ref:2.4 GHz
- Intel Xeon X5660, Ref:2.8 GHz
System bus rate
- Intel Xeon E5645, Ref:5.86 GT/s
- Intel Xeon X5660, Ref:6.4 GT/s
Processor boost frequency
- Intel Xeon E5645, Ref:2.67 GHz
- Intel Xeon X5660, Ref:3.2 GHz
Thermal Design Power (TDP)
- Intel Xeon E5645, Ref:80 W
- Intel Xeon X5660, Ref:95 W
Embedded options available
- Intel Xeon E5645, Ref:Yes
- Intel Xeon X5660, Ref:No
Tcase
- Intel Xeon E5645, Ref:76.2 °C
- Intel Xeon X5660, Ref:81.3 °C

Side by side

Differences highlightedShow differences only

Comparison of Intel Xeon E5645, Ref, Intel Xeon X5660, Ref
46 specifications	A HP Intel Xeon E5645, Ref View product	B HP Intel Xeon X5660, Ref View product
Processor5 differ
Processor family	Intel® Xeon® 5000 Sequence	Intel® Xeon® 5000 Sequence
Processor modelDiffers	E5645	X5660
Processor base frequencyDiffers	2.4 GHz	2.8 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 rateDiffers	5.86 GT/s	6.4 GT/s
Processor operating modes	32-bit, 64-bit	32-bit, 64-bit
Processor boost frequencyDiffers	2.67 GHz	3.2 GHz
Processor cache	12 MB	12 MB
Processor cache type	L3	L3
Processor front side busKnown for one	Unknown — not stated by the source	1333 MHz
Thermal Design Power (TDP)Differs	80 W	95 W
VID Voltage Range	0.750 - 1.350 V	0.750 - 1.350 V
Bus type	QPI	QPI
CPU multiplier (bus/core ratio)Known for one	Unknown — not stated by the source	20
Number of QPI links	2	2
Memory bandwidth supported by processor (max)	32 GB/s	32 GB/s
SteppingKnown for one	B1	Unknown — not stated by the source
Memoryidentical
Maximum internal memory supported by processor	288 GB	288 GB
Memory types supported by processor	DDR3-SDRAM	DDR3-SDRAM
Memory clock speeds supported by processor	800,1066,1333 MHz	800,1066,1333 MHz
Memory channels	Triple-channel	Triple-channel
ECC	Yes	Yes
Graphicsidentical
On-board graphics card	No	No
Features1 differ
Execute Disable Bit	Yes	Yes
Idle States	Yes	Yes
Thermal Monitoring Technologies	No	No
Market segment	Server	Server
Embedded options availableDiffers	Yes	No
Supported instruction setsKnown for one	SSE4.2	Unknown — not stated by the source
Processor special featuresidentical
Enhanced Intel SpeedStep Technology	Yes	Yes
Intel Trusted Execution Technology	Yes	Yes
Intel® AES New Instructions (Intel® AES-NI)	Yes	Yes
Intel® Hyper Threading Technology (Intel® HT Technology)	Yes	Yes
Intel® Smart CacheKnown for one	Unknown — not stated by the source	Yes
Intel® Turbo Boost Technology	Yes	Yes
Intel Demand Based Switching	Yes	Yes
Intel VT-x with Extended Page Tables (EPT)	Yes	Yes
Intel Virtualization Technology (VT-x)	Yes	Yes
Intel Virtualization Technology for Directed I/O (VT-d)	Yes	Yes
Operational conditions1 differ
TcaseDiffers	76.2 °C	81.3 °C
Technical detailsidentical
Compliance certificates	RoHS	RoHS
Other featuresidentical
Intel® Virtualization Technology (Intel® VT)	VT-d, VT-x	VT-d, VT-x

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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