Pentium D 840 EE vs A6-6400K

Primary details

Comparing A6-6400K and Pentium D 840 EE processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2498	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Series	AMD A-Series (Desktop)	no data
Power efficiency	1.37	no data
Architecture codename	Richland (2013−2014)	Smithfield (2005)
Release date	1 June 2013 (11 years ago)	May 2005 (19 years ago)

Detailed specifications

A6-6400K and Pentium D 840 EE 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	2 (Dual-core)	2 (Dual-core)
Threads	2	4
Base clock speed	3.9 GHz	no data
Boost clock speed	4.1 GHz	3.2 GHz
L1 cache	96 KB	28 KB
L2 cache	1024 KB	2 MB
L3 cache	0 KB	0 KB
Chip lithography	32 nm	90 nm
Die size	246 mm2	206 mm2
Maximum core temperature	70 °C	no data
Maximum case temperature (TCase)	70 °C	no data
Number of transistors	1,178 million	169 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-

Compatibility

Information on A6-6400K and Pentium D 840 EE 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	1	2
Socket	FM2	775
Power consumption (TDP)	65 Watt	130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by A6-6400K and Pentium D 840 EE. You'll probably need this information if you require some particular technology.

Instruction set extensions	MMX, SSE1-4a, AES, ABM, AVX, BMI1, AMD64, VT, EVP, Turbo Core 3.0	no data
AES-NI	+	-
FMA	FMA4	-
AVX	+	-
PowerNow	+	-
PowerGating	+	-
VirusProtect	+	-
Enhanced SpeedStep (EIST)	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by A6-6400K and Pentium D 840 EE are enumerated here.

AMD-V	+	-
IOMMU 2.0	+	-

Memory specs

Types, maximum amount and channel quantity of RAM supported by A6-6400K and Pentium D 840 EE. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3-1866	DDR1, DDR2, DDR3
Max memory channels	2	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	AMD Radeon HD 8470D	no data
Number of pipelines	192	no data
Enduro	+	-
Switchable graphics	+	-
UVD	+	-
VCE	+	-

Graphics interfaces

Available interfaces and connections of A6-6400K and Pentium D 840 EE integrated GPUs.

DisplayPort	+	-
HDMI	+	-

Graphics API support

APIs supported by A6-6400K and Pentium D 840 EE integrated GPUs, sometimes API versions are included.

DirectX

DirectX® 11

no data

Peripherals

Specifications and connection of peripherals supported by A6-6400K and Pentium D 840 EE.

PCIe version

2.0

no data

Pros & cons summary

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Threads	2	4
Chip lithography	32 nm	90 nm
Power consumption (TDP)	65 Watt	130 Watt

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