i5-661 vs Xeon E5-2640 v3

Primary details

Comparing Xeon E5-2640 v3 and Core i5-661 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	977	2078
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.09
Market segment	Server	Desktop processor
Architecture codename	Haswell-EP (2014−2015)	Clarkdale (2010−2011)
Release date	8 September 2014 (10 years ago)	7 January 2010 (14 years ago)
Launch price (MSRP)	no data	$252

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2640 v3 and Core i5-661 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)	2 (Dual-core)
Threads	16	4
Base clock speed	2.6 GHz	3.33 GHz
Boost clock speed	3.4 GHz	3.6 GHz
Bus rate	8 GT/s	2.5 GT/s
L1 cache	64K (per core)	64 KB (per core)
L2 cache	256K (per core)	256 KB (per core)
L3 cache	20 MB (shared)	4 MB (shared)
Chip lithography	22 nm	32 nm
Die size	356 mm2	81 mm2
Maximum core temperature	74 °C	70 °C
Number of transistors	2,600 million	382 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E5-2640 v3 and Core i5-661 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	FCLGA1156
Power consumption (TDP)	90 Watt	87 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2640 v3 and Core i5-661. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® SSE4.2
AES-NI	+	+
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	1.0
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	+	-
Flex Memory Access	-	no data
Demand Based Switching	+	-
PAE	46 Bit	36 Bit
FDI	no data	+
Status	Discontinued	Discontinued

Security technologies

Xeon E5-2640 v3 and Core i5-661 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2640 v3 and Core i5-661 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2640 v3 and Core i5-661. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866	DDR3
Maximum memory size	768 GB	16.38 GB
Max memory channels	4	2
Maximum memory bandwidth	59 GB/s	21 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel® HD Graphics for Previous Generation Intel® Processors
Clear Video HD	no data	+

Graphics interfaces

Available interfaces and connections of Xeon E5-2640 v3 and Core i5-661 integrated GPUs.

Number of displays supported

no data

2

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2640 v3 and Core i5-661.

PCIe version	3.0	2.0
PCI Express lanes	40	16

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.

Pros & cons summary

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Performance score	7.18	1.60
Recency	8 September 2014	7 January 2010
Physical cores	8	2
Threads	16	4
Chip lithography	22 nm	32 nm
Power consumption (TDP)	90 Watt	87 Watt

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Should you still have questions on choice between Xeon E5-2640 v3 and Core i5-661, ask them in Comments section, and we shall answer.

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