Xeon E-2356G vs E5645

Primary details

Comparing Xeon E5645 and Xeon E-2356G processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1605	664
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.38	no data
Market segment	Server	Server
Power efficiency	3.76	13.79
Architecture codename	Westmere-EP (2010−2011)	Rocket Lake-E (2021)
Release date	16 March 2010 (14 years ago)	8 September 2021 (3 years ago)
Launch price (MSRP)	$294	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5645 and Xeon E-2356G 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	6 (Hexa-Core)	6 (Hexa-Core)
Threads	12	12
Base clock speed	2.4 GHz	3.2 GHz
Boost clock speed	2.67 GHz	5 GHz
Bus rate	no data	8 GT/s
L1 cache	64 KB (per core)	64K (per core)
L2 cache	256 KB (per core)	512K (per core)
L3 cache	12 MB (shared)	12 MB (shared)
Chip lithography	32 nm	14 nm
Die size	239 mm2	no data
Maximum core temperature	76 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	1,170 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Xeon E5645 and Xeon E-2356G 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	1
Socket	FCLGA1366,LGA1366	FCLGA1200
Power consumption (TDP)	80 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5645 and Xeon E-2356G. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	2.0
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	-	+
Demand Based Switching	+	no data
PAE	40 Bit	no data

Security technologies

Xeon E5645 and Xeon E-2356G technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5645 and Xeon E-2356G are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Xeon E-2356G. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-3200
Maximum memory size	288 GB	128 GB
Max memory channels	3	2
Maximum memory bandwidth	32 GB/s	no data
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel UHD Graphics P750
Max video memory	no data	64 GB
Quick Sync Video	-	+
Clear Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.3 GHz
Execution Units	no data	32
InTru 3D	no data	+

Graphics interfaces

Available interfaces and connections of Xeon E5645 and Xeon E-2356G integrated GPUs.

Number of displays supported

no data

1

Graphics image quality

Maximum display resolutions supported by Xeon E5645 and Xeon E-2356G integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096 x 2160 @60 Hz
Max resolution over eDP	no data	5120 x 3200 @ 60 Hz
Max resolution over DisplayPort	no data	5120 x 3200 @ 60 Hz

Graphics API support

APIs supported by Xeon E5645 and Xeon E-2356G integrated GPUs, sometimes API versions are included.

DirectX	no data	12.1
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Xeon E5645 and Xeon E-2356G.

PCIe version	2.0	4.0
PCI Express lanes	no data	44

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	3.18	11.66
Recency	16 March 2010	8 September 2021
Chip lithography	32 nm	14 nm

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Should you still have questions on choice between Xeon E5645 and Xeon E-2356G, ask them in Comments section, and we shall answer.

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