Xeon Phi 7255 vs E5-2640 v4

Primary details

Comparing Xeon E5-2640 v4 and Xeon Phi 7255 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	955	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.76	no data
Market segment	Server	Server
Series	Intel Xeon E5	no data
Power efficiency	8.29	no data
Architecture codename	Broadwell (2015−2019)	no data
Release date	20 June 2016 (8 years ago)	1 October 2017 (7 years ago)
Launch price (MSRP)	$939	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2640 v4 and Xeon Phi 7255 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	10 (Deca-Core)	68 (Octahexaconta-Core)
Threads	20	68
Base clock speed	2.4 GHz	1.1 GHz
Boost clock speed	3.4 GHz	1.2 GHz
Bus type	QPI	no data
Bus rate	2 × 8 GT/s	no data
Multiplier	24	no data
L2 cache	2.5 MB	no data
L3 cache	25 MB	34 MB L2 Cache
Chip lithography	14 nm	14 nm
Die size	246.24 mm2	no data
Maximum core temperature	76 °C	82 °C
Number of transistors	3200 Million	no data
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	no data	0.550-1.2V

Compatibility

Information on Xeon E5-2640 v4 and Xeon Phi 7255 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)	no data
Socket	FCLGA2011	no data
Power consumption (TDP)	90 Watt	215 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2640 v4 and Xeon Phi 7255. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® AVX-512
AES-NI	+	+
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	no data
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	-	no data
Demand Based Switching	+	no data
PAE	46 Bit	no data

Security technologies

Xeon E5-2640 v4 and Xeon Phi 7255 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2640 v4 and Xeon Phi 7255 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2640 v4 and Xeon Phi 7255. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866, DDR4-2133	DDR4-2400
Maximum memory size	1.5 TB	384 GB
Max memory channels	4	6
Maximum memory bandwidth	68.3 GB/s	115.2 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2640 v4 and Xeon Phi 7255.

PCIe version	3.0	3.0
PCI Express lanes	40	36

Pros & cons summary

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Recency	20 June 2016	1 October 2017
Physical cores	10	68
Threads	20	68
Power consumption (TDP)	90 Watt	215 Watt

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Should you still have questions on choice between Xeon E5-2640 v4 and Xeon Phi 7255, ask them in Comments section, and we shall answer.

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