A6-6400B vs Athlon X4 845

Place in the ranking	1786	2460
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	3.48	1.49
Architecture codename	Carrizo (2015−2018)	Richland (2013−2014)
Release date	2 February 2016 (8 years ago)	1 June 2013 (11 years ago)

Detailed specifications

Athlon X4 845 and A6-6400B 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	4 (Quad-Core)	2 (Dual-core)
Threads	4	2
Base clock speed	3.5 GHz	3.9 GHz
Boost clock speed	3.8 GHz	4.1 GHz
L1 cache	320K	96K
L2 cache	2 MB	1 MB (shared)
Chip lithography	28 nm	32 nm
Die size	250 mm²	246 mm²
Maximum case temperature (TCase)	74 °C	70 °C
Number of transistors	3,100 million	1,303 million
64 bit support	+	+
Unlocked multiplier	+	+

Compatibility

Information on Athlon X4 845 and A6-6400B 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	1
Socket	FM2+	FM2
Power consumption (TDP)	65 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Athlon X4 845 and A6-6400B. You'll probably need this information if you require some particular technology.

AES-NI	+	+
FMA	+	+
AVX	+	+
PowerNow	-	+

Virtualization technologies

Virtual machine speed-up technologies supported by Athlon X4 845 and A6-6400B are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon X4 845 and A6-6400B. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3-2133

DDR3-1866

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

AMD Radeon HD 8470D

Peripherals

Specifications and connection of peripherals supported by Athlon X4 845 and A6-6400B.

PCIe version	3.0	2.0
PCI Express lanes	8	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.

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.

Athlon X4 845 2.39
+134%

A6-6400B 1.02

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Athlon X4 845 3799
+135%

A6-6400B 1616

Gaming performance

Pros & cons summary

Performance score	2.39	1.02
Recency	2 February 2016	1 June 2013
Physical cores	4	2
Threads	4	2
Chip lithography	28 nm	32 nm

Athlon X4 845 has a 134.3% higher aggregate performance score, an age advantage of 2 years, 100% more physical cores and 100% more threads, and a 14.3% more advanced lithography process.

The Athlon X4 845 is our recommended choice as it beats the A6-6400B in performance tests.

Should you still have questions on choice between Athlon X4 845 and A6-6400B, ask them in Comments section, and we shall answer.