Xeon E5649 vs E5-2670 v3

Primary details

Comparing Xeon E5-2670 v3 and Xeon E5649 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	880	1508
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.87	1.56
Market segment	Server	Server
Series	Intel Xeon E5	no data
Power efficiency	6.74	4.24
Architecture codename	Haswell-EP (2014−2015)	Westmere-EP (2010−2011)
Release date	8 September 2014 (10 years ago)	14 February 2011 (13 years ago)
Launch price (MSRP)	$1,589	$45

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E5-2670 v3 has 20% better value for money than Xeon E5649.

Detailed specifications

Xeon E5-2670 v3 and Xeon E5649 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	12 (Dodeca-Core)	6 (Hexa-Core)
Threads	24	12
Base clock speed	2.3 GHz	2.53 GHz
Boost clock speed	3.1 GHz	2.93 GHz
Bus type	QPI	no data
Bus rate	2 × 9.6 GT/s	no data
Multiplier	23	no data
L1 cache	64K (per core)	64 KB (per core)
L2 cache	256K (per core)	256 KB (per core)
L3 cache	30 MB (shared)	12288 KB (shared)
Chip lithography	22 nm	32 nm
Die size	356 mm2	239 mm2
Maximum core temperature	85 °C	76 °C
Number of transistors	2,600 million	1,170 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-2670 v3 and Xeon E5649 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	2 (Multiprocessor)	2
Socket	FCLGA2011	FCLGA1366
Power consumption (TDP)	120 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2670 v3 and Xeon E5649. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® SSE4.2
AES-NI	+	+
FMA	+	-
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	1.0
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	+	-
Flex Memory Access	-	no data
Demand Based Switching	+	+
PAE	46 Bit	40 Bit

Security technologies

Xeon E5-2670 v3 and Xeon E5649 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2670 v3 and Xeon E5649 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2670 v3 and Xeon E5649. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866, DDR4-2133	DDR3
Maximum memory size	768 GB	288 GB
Max memory channels	4	3
Maximum memory bandwidth	68 GB/s	32 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2670 v3 and Xeon E5649.

PCIe version	3.0	2.0
PCI Express lanes	40	no data

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	8.55	3.58
Recency	8 September 2014	14 February 2011
Physical cores	12	6
Threads	24	12
Chip lithography	22 nm	32 nm
Power consumption (TDP)	120 Watt	80 Watt

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Should you still have questions on choice between Xeon E5-2670 v3 and Xeon E5649, ask them in Comments section, and we shall answer.

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