A8-3870K vs A6-9400

Place in the ranking	2034	2157
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	2.50	1.39
Architecture codename	Bristol Ridge (2016−2019)	Llano (2011−2012)
Release date	16 March 2019 (5 years ago)	20 December 2011 (12 years ago)

Detailed specifications

A6-9400 and A8-3870K 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)	4 (Quad-Core)
Threads	2	4
Base clock speed	3.4 GHz	3 GHz
Boost clock speed	3.7 GHz	3 GHz
L1 cache	160K	128 KB (per core)
L2 cache	1 MB (shared)	1 MB (per core)
L3 cache	no data	0 KB
Chip lithography	28 nm	32 nm
Die size	250 mm²	228 mm²
Number of transistors	3,100 million	1,178 million
64 bit support	+	+
Windows 11 compatibility	no data	-
Unlocked multiplier	-	+

Compatibility

Information on A6-9400 and A8-3870K 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	AM4	FM1
Power consumption (TDP)	65 Watt	100 Watt

Technologies and extensions

Technological solutions and additional instructions supported by A6-9400 and A8-3870K. You'll probably need this information if you require some particular technology.

AES-NI	+	-
FMA	+	-
AVX	+	-

Virtualization technologies

Virtual machine speed-up technologies supported by A6-9400 and A8-3870K are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by A6-9400 and A8-3870K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR4-2400

DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

Radeon R5

AMD Radeon HD 6550D

Peripherals

Specifications and connection of peripherals supported by A6-9400 and A8-3870K.

PCIe version	3.0	no data
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.

A6-9400 1.78
+17.1%

A8-3870K 1.52

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.

A6-9400 2717
+16.7%

A8-3870K 2328

Gaming performance

Pros & cons summary

Performance score	1.78	1.52
Recency	16 March 2019	20 December 2011
Physical cores	2	4
Threads	2	4
Chip lithography	28 nm	32 nm
Power consumption (TDP)	65 Watt	100 Watt

A6-9400 has a 17.1% higher aggregate performance score, an age advantage of 7 years, a 14.3% more advanced lithography process, and 53.8% lower power consumption.

A8-3870K, on the other hand, has 100% more physical cores and 100% more threads.

The A6-9400 is our recommended choice as it beats the A8-3870K in performance tests.

Should you still have questions on choice between A6-9400 and A8-3870K, ask them in Comments section, and we shall answer.