Xeon E5649 vs E3-1246 v3

Primary details

Comparing Xeon E3-1246 v3 and Xeon E5649 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1293	1510
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	1.56
Market segment	Server	Server
Power efficiency	5.17	4.24
Architecture codename	no data	Westmere-EP (2010−2011)
Release date	1 April 2014 (10 years ago)	14 February 2011 (13 years ago)
Launch price (MSRP)	no data	$45

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E3-1246 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	4 (Quad-Core)	6 (Hexa-Core)
Threads	8	12
Base clock speed	3.5 GHz	2.53 GHz
Boost clock speed	3.9 GHz	2.93 GHz
Bus rate	5 GT/s	no data
L1 cache	no data	64 KB (per core)
L2 cache	no data	256 KB (per core)
L3 cache	8 MB Intel® Smart Cache	12288 KB (shared)
Chip lithography	22 nm	32 nm
Die size	no data	239 mm2
Maximum core temperature	no data	76 °C
Number of transistors	no data	1,170 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E3-1246 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	1	2
Socket	FCLGA1150	FCLGA1366
Power consumption (TDP)	84 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1246 v3 and Xeon E5649. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.2
AES-NI	+	+
Enhanced SpeedStep (EIST)	+	+
My WiFi	-	no data
Turbo Boost Technology	2.0	1.0
Hyper-Threading Technology	+	+
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	-
Flex Memory Access	+	no data
SIPP	+	-
Demand Based Switching	no data	+
PAE	no data	40 Bit
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Xeon E3-1246 v3 and Xeon E5649 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	no data
Identity Protection	+	-
OS Guard	+	no data
Anti-Theft	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1246 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 E3-1246 v3 and Xeon E5649. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3L-1333, DDR3L-1600	DDR3
Maximum memory size	32 GB	288 GB
Max memory channels	2	3
Maximum memory bandwidth	25.6 GB/s	32 GB/s
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Max video memory	1.7 GB	no data
Quick Sync Video	+	-
Clear Video HD	+	no data
Graphics max frequency	1.2 GHz	no data
Execution Units	20	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Xeon E3-1246 v3 and Xeon E5649 integrated GPUs.

Number of displays supported	3	no data
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
VGA	+	no data

Graphics image quality

Maximum display resolutions supported by Xeon E3-1246 v3 and Xeon E5649 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	3840x2160@60Hz	no data
Max resolution over DisplayPort	3840x2160@60Hz	no data
Max resolution over VGA	2880x1800@60Hz	no data

Graphics API support

APIs supported by Xeon E3-1246 v3 and Xeon E5649 integrated GPUs, sometimes API versions are included.

DirectX	11.2	no data
OpenGL	4.3	no data

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1246 v3 and Xeon E5649.

PCIe version	3.0	2.0
PCI Express lanes	16	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	4.59	3.58
Recency	1 April 2014	14 February 2011
Physical cores	4	6
Threads	8	12
Chip lithography	22 nm	32 nm
Power consumption (TDP)	84 Watt	80 Watt

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Should you still have questions on choice between Xeon E3-1246 v3 and Xeon E5649, ask them in Comments section, and we shall answer.

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