Xeon E5645 vs E3-1220 v5

Primary details

Comparing Xeon E3-1220 v5 and Xeon E5645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1375	1492
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.02	0.99
Market segment	Server	Server
Series	Intel Xeon E3	no data
Architecture codename	Skylake (2015−2016)	Westmere-EP (2010−2011)
Release date	19 October 2015 (8 years ago)	16 March 2010 (14 years ago)
Launch price (MSRP)	$203	$294
Current price	$91 (0.4x MSRP)	$84 (0.3x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E3-1220 v5 has 3% better value for money than Xeon E5645.

Detailed specifications

Xeon E3-1220 v5 and Xeon E5645 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	4	12
Base clock speed	3 GHz	2.4 GHz
Boost clock speed	3.5 GHz	2.67 GHz
Bus support	4 × 8 GT/s	no data
L1 cache	256 KB	64 KB (per core)
L2 cache	1 MB	256 KB (per core)
L3 cache	8 MB	12 MB (shared)
Chip lithography	14 nm	32 nm
Die size	122 mm2	239 mm2
Maximum core temperature	no data	76 °C
Number of transistors	no data	1,170 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Xeon E3-1220 v5 and Xeon E5645 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	FCLGA1151	FCLGA1366,LGA1366
Power consumption (TDP)	80 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1220 v5 and Xeon E5645. 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	+	+
AVX	+	no data
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	1.0
Hyper-Threading Technology	-	+
TSX	+	no data
Idle States	+	+
Thermal Monitoring	+	-
Demand Based Switching	no data	+
PAE	no data	40 Bit
Status	Discontinued	Discontinued

Security technologies

Xeon E3-1220 v5 and Xeon E5645 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	no data
MPX	+	no data
SGX	Yes with both Intel® SPS and Intel® ME	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1220 v5 and Xeon E5645 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1220 v5 and Xeon E5645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1866, DDR4-2133, DDR3L-1333, DDR3L-1600	DDR3
Maximum memory size	64 GB	288 GB
Max memory channels	2	3
Maximum memory bandwidth	34.1 GB/s	32 GB/s
ECC memory support	+	+

Graphics image quality

Maximum display resolutions supported by Xeon E3-1220 v5 and Xeon E5645 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	N/A	no data
Max resolution over eDP	N/A	no data
Max resolution over DisplayPort	N/A	no data
Max resolution over VGA	N/A	no data

Graphics API support

APIs supported by Xeon E3-1220 v5 and Xeon E5645 integrated GPUs, sometimes API versions are included.

DirectX	N/A	no data
OpenGL	N/A	no data

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1220 v5 and Xeon E5645.

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.

E3-1220 v5 outperforms E5645 by 15% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	3.75	3.26
Recency	19 October 2015	16 March 2010
Physical cores	4	6
Threads	4	12
Cost	$203	$294
Chip lithography	14 nm	32 nm

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Should you still have questions on choice between Xeon E3-1220 v5 and Xeon E5645, ask them in Comments section, and we shall answer.

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