Xeon X5647 vs E3-1265L v2

Primary details

Comparing Xeon E3-1265L v2 and Xeon X5647 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1604	1685
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.96	1.78
Market segment	Server	Server
Power efficiency	6.81	2.04
Architecture codename	Ivy Bridge (2012−2013)	Westmere-EP (2010−2011)
Release date	14 May 2012 (12 years ago)	14 February 2011 (13 years ago)
Launch price (MSRP)	$142	$175

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E3-1265L v2 has 66% better value for money than Xeon X5647.

Detailed specifications

Xeon E3-1265L v2 and Xeon X5647 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	4 (Quad-Core)	4 (Quad-Core)
Threads	8	8
Base clock speed	2.5 GHz	2.93 GHz
Boost clock speed	3.5 GHz	3.2 GHz
Bus rate	5 GT/s	no data
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	8 MB (shared)	12 MB (shared)
Chip lithography	22 nm	32 nm
Die size	160 mm2	239 mm2
Maximum core temperature	no data	80 °C
Number of transistors	1,400 million	1,170 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E3-1265L v2 and Xeon X5647 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	2
Socket	FCLGA1155	FCLGA1366,LGA1366
Power consumption (TDP)	45 Watt	130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1265L v2 and Xeon X5647. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX	Intel® SSE4.2
AES-NI	+	+
AVX	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	1.0
Hyper-Threading Technology	+	+
Idle States	+	+
Demand Based Switching	no data	+
PAE	no data	40 Bit
FDI	+	no data

Security technologies

Xeon E3-1265L v2 and Xeon X5647 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Identity Protection	+	-

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1265L v2 and Xeon X5647 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1265L v2 and Xeon X5647. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	32.77 GB	288 GB
Max memory channels	2	3
Maximum memory bandwidth	no data	25.6 GB/s
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 2500	no data
Quick Sync Video	+	-
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	1.15 GHz	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Xeon E3-1265L v2 and Xeon X5647 integrated GPUs.

Number of displays supported

3

no data

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1265L v2 and Xeon X5647.

PCIe version

3.0

2.0

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	3.24	2.80
Recency	14 May 2012	14 February 2011
Chip lithography	22 nm	32 nm
Power consumption (TDP)	45 Watt	130 Watt

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Should you still have questions on choice between Xeon E3-1265L v2 and Xeon X5647, ask them in Comments section, and we shall answer.

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