Athlon II X4 638 vs Xeon E5-2640 v2

Primary details

Comparing Xeon E5-2640 v2 and Athlon II X4 638 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1142	2068
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.27	2.05
Market segment	Server	Desktop processor
Architecture codename	Ivy Bridge-EP (2013)	Llano (2011−2012)
Release date	1 September 2013 (10 years ago)	6 February 2012 (12 years ago)
Launch price (MSRP)	$728	no data
Current price	$187 (0.3x MSRP)	$27

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E5-2640 v2 has 60% better value for money than Athlon II X4 638.

Detailed specifications

Xeon E5-2640 v2 and Athlon II X4 638 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	8 (Octa-Core)	4 (Quad-Core)
Threads	16	4
Base clock speed	2 GHz	2.7 GHz
Boost clock speed	2.5 GHz	2.7 GHz
L1 cache	64 KB (per core)	128 KB (per core)
L2 cache	256 KB (per core)	1 MB (per core)
L3 cache	20 MB (shared)	0 KB
Chip lithography	22 nm	32 nm
Die size	160 mm2	228 mm2
Maximum core temperature	75 °C	no data
Number of transistors	1,400 million	1,178 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Xeon E5-2640 v2 and Athlon II X4 638 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	FM1
Power consumption (TDP)	95 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2640 v2 and Athlon II X4 638. You'll probably need this information if you require some particular technology.

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

Security technologies

Xeon E5-2640 v2 and Athlon II X4 638 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data
Secure Key	+	no data
Identity Protection	-	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2640 v2 and Athlon II X4 638 are enumerated here.

AMD-V	no data	+
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 v2 and Athlon II X4 638. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	768 GB	no data
Max memory channels	4	no data
Maximum memory bandwidth	51.2 GB/s	no data
ECC memory support	+	no data

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2640 v2 and Athlon II X4 638.

PCIe version	3.0	no data
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.

Xeon E5-2640 v2 outperforms Athlon II X4 638 by 240% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	4.93	1.45
Recency	1 September 2013	6 February 2012
Physical cores	8	4
Threads	16	4
Chip lithography	22 nm	32 nm
Power consumption (TDP)	95 Watt	65 Watt

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Should you still have questions on choice between Xeon E5-2640 v2 and Athlon II X4 638, ask them in Comments section, and we shall answer.

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