A10-7850K vs Xeon E5-2666 V3

Primary details

Comparing Xeon E5-2666 V3 and A10-7850K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	854	1851
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.25
Market segment	Server	Desktop processor
Series	no data	AMD A-Series (Desktop)
Power efficiency	6.28	2.13
Architecture codename	Haswell-EP (2014−2015)	Godaveri (2014−2016)
Release date	13 November 2014 (10 years ago)	14 January 2014 (10 years ago)
Launch price (MSRP)	no data	$173

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2666 V3 and A10-7850K 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	2.9 GHz	3.7 GHz
Boost clock speed	3.5 GHz	4 GHz
L1 cache	64K (per core)	256 KB
L2 cache	256K (per core)	4096 KB
L3 cache	25 MB (shared)	0 KB
Chip lithography	22 nm	28 nm
Die size	356 mm2	246 mm2
Maximum core temperature	no data	72 °C
Maximum case temperature (TCase)	no data	74 °C
Number of transistors	2,600 million	1,178 million
64 bit support	+	+
Windows 11 compatibility	no data	-
Unlocked multiplier	-	+

Compatibility

Information on Xeon E5-2666 V3 and A10-7850K 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	2011-3	FM2+
Power consumption (TDP)	135 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2666 V3 and A10-7850K. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	SSE1-4A, AVX, FM4A, VT
AES-NI	+	+
FMA	-	FMA4
AVX	+	+
FRTC	-	+
FreeSync	-	+
DualGraphics	-	+
TrueAudio	-	+
PowerNow	-	+
PowerGating	-	+
Out-of-band client management	-	+
VirusProtect	-	+
HSA	-	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
TSX	+	-

Security technologies

Xeon E5-2666 V3 and A10-7850K technologies aimed at improving security, for example, by protecting against hacks.

TXT

+

no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2666 V3 and A10-7850K are enumerated here.

AMD-V	-	+
VT-d	+	no data
VT-x	+	no data
IOMMU 2.0	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2666 V3 and A10-7850K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4 2133 MHz Quad-channel	DDR3-2133
Max memory channels	no data	2

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	AMD Radeon R7 Graphics
iGPU core count	no data	8
Number of pipelines	no data	512
Enduro	-	+
Switchable graphics	-	+
UVD	-	+
VCE	-	+

Graphics interfaces

Available interfaces and connections of Xeon E5-2666 V3 and A10-7850K integrated GPUs.

DisplayPort	-	+
HDMI	-	+

Graphics API support

APIs supported by Xeon E5-2666 V3 and A10-7850K integrated GPUs, sometimes API versions are included.

DirectX	no data	DirectX® 12
Vulkan	-	+

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2666 V3 and A10-7850K.

PCIe version	3.0	3.0
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	8.96	2.14
Recency	13 November 2014	14 January 2014
Physical cores	10	4
Threads	20	4
Chip lithography	22 nm	28 nm
Power consumption (TDP)	135 Watt	95 Watt

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Should you still have questions on choice between Xeon E5-2666 V3 and A10-7850K, ask them in Comments section, and we shall answer.

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