Xeon Platinum 8156 vs E5645

Primary details

Comparing Xeon E5645 and Xeon Platinum 8156 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1618	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.38	no data
Market segment	Server	Server
Series	no data	Intel Xeon Platinum
Power efficiency	3.76	no data
Architecture codename	Westmere-EP (2010−2011)	Skylake (server) (2017−2018)
Release date	16 March 2010 (14 years ago)	25 April 2017 (7 years ago)
Launch price (MSRP)	$294	$7,007

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5645 and Xeon Platinum 8156 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)	4 (Quad-Core)
Threads	12	8
Base clock speed	2.4 GHz	3.6 GHz
Boost clock speed	2.67 GHz	3.7 GHz
Multiplier	no data	36
L1 cache	64 KB (per core)	256 KB
L2 cache	256 KB (per core)	4 MB
L3 cache	12 MB (shared)	16.5 MB
Chip lithography	32 nm	14 nm
Die size	239 mm2	no data
Maximum core temperature	76 °C	71 °C
Number of transistors	1,170 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Xeon E5645 and Xeon Platinum 8156 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	8 (Multiprocessor)
Socket	FCLGA1366,LGA1366	FCLGA3647
Power consumption (TDP)	80 Watt	105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5645 and Xeon Platinum 8156. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
AVX	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	1.0	2.0
Hyper-Threading Technology	+	+
TSX	-	+
Idle States	+	no data
Demand Based Switching	+	no data
PAE	40 Bit	no data
Turbo Boost Max 3.0	no data	-

Security technologies

Xeon E5645 and Xeon Platinum 8156 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5645 and Xeon Platinum 8156 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Xeon Platinum 8156. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-2666
Maximum memory size	288 GB	768 GB
Max memory channels	3	6
Maximum memory bandwidth	32 GB/s	128.001 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Xeon E5645 and Xeon Platinum 8156.

PCIe version	2.0	3.0
PCI Express lanes	no data	48

Pros & cons summary

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Recency	16 March 2010	25 April 2017
Physical cores	6	4
Threads	12	8
Chip lithography	32 nm	14 nm
Power consumption (TDP)	80 Watt	105 Watt

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