Athlon II X4 645 vs Xeon E5-2620 v3

Primary details

Comparing Xeon E5-2620 v3 and Athlon II X4 645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1230	2152
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	3.30
Market segment	Server	Desktop processor
Power efficiency	5.48	1.47
Architecture codename	Haswell-EP (2014−2015)	Propus (2009−2011)
Release date	8 September 2014 (10 years ago)	21 September 2010 (14 years ago)
Launch price (MSRP)	no data	$80

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2620 v3 and Athlon II X4 645 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	4
Base clock speed	2.4 GHz	3.1 GHz
Boost clock speed	3.2 GHz	3.1 GHz
Bus rate	8 GT/s	no data
L1 cache	64K (per core)	128 KB (per core)
L2 cache	256K (per core)	512 KB (per core)
L3 cache	15 MB (shared)	0 KB
Chip lithography	22 nm	45 nm
Die size	356 mm2	169 mm2
Maximum core temperature	73 °C	no data
Number of transistors	2,600 million	300 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-2620 v3 and Athlon II X4 645 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	FCLGA2011	AM3
Power consumption (TDP)	85 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2620 v3 and Athlon II X4 645. 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
Idle States	+	no data
Thermal Monitoring	+	-
Flex Memory Access	-	no data
Demand Based Switching	+	no data
PAE	46 Bit	no data

Security technologies

Xeon E5-2620 v3 and Athlon II X4 645 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 E5-2620 v3 and Athlon II X4 645 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2620 v3 and Athlon II X4 645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866	DDR3
Maximum memory size	768 GB	no data
Max memory channels	4	no data
Maximum memory bandwidth	59 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2620 v3 and Athlon II X4 645.

PCIe version	3.0	2.0
PCI Express lanes	40	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.

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Pros & cons summary

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Performance score	4.92	1.48
Recency	8 September 2014	21 September 2010
Physical cores	6	4
Threads	12	4
Chip lithography	22 nm	45 nm
Power consumption (TDP)	85 Watt	95 Watt

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Should you still have questions on choice between Xeon E5-2620 v3 and Athlon II X4 645, ask them in Comments section, and we shall answer.

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