Athlon II X4 651K vs Xeon E5-2640 v4

Primary details

Comparing Xeon E5-2640 v4 and Athlon II X4 651K 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	Desktop processor
Series	Intel Xeon E5	no data
Power efficiency	8.29	no data
Architecture codename	Broadwell (2015−2019)	Llano (2011−2012)
Release date	20 June 2016 (8 years ago)	14 November 2011 (13 years ago)
Launch price (MSRP)	$939	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2640 v4 and Athlon II X4 651K 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)	4 (Quad-Core)
Threads	20	4
Base clock speed	2.4 GHz	3 GHz
Boost clock speed	3.4 GHz	3 GHz
Bus type	QPI	no data
Bus rate	2 × 8 GT/s	no data
Multiplier	24	no data
L1 cache	no data	128 KB (per core)
L2 cache	2.5 MB	1 MB (per core)
L3 cache	25 MB	0 KB
Chip lithography	14 nm	32 nm
Die size	246.24 mm2	228 mm2
Maximum core temperature	76 °C	no data
Number of transistors	3200 Million	1,178 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-2640 v4 and Athlon II X4 651K 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)	1
Socket	FCLGA2011	FM1
Power consumption (TDP)	90 Watt	100 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2640 v4 and Athlon II X4 651K. You'll probably need this information if you require some particular technology.

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

Security technologies

Xeon E5-2640 v4 and Athlon II X4 651K technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2640 v4 and Athlon II X4 651K are enumerated here.

AMD-V	-	+
VT-d	+	no data
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2640 v4 and Athlon II X4 651K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866, DDR4-2133	DDR3
Maximum memory size	1.5 TB	no data
Max memory channels	4	no data
Maximum memory bandwidth	68.3 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2640 v4 and Athlon II X4 651K.

PCIe version	3.0	no data
PCI Express lanes	40	no data

Pros & cons summary

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Recency	20 June 2016	14 November 2011
Physical cores	10	4
Threads	20	4
Chip lithography	14 nm	32 nm
Power consumption (TDP)	90 Watt	100 Watt

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