A8-3870K vs A4-4000

Place in the ranking	2703	2175
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	1.05	1.39
Architecture codename	Richland (2013−2014)	Llano (2011−2012)
Release date	1 June 2013 (11 years ago)	20 December 2011 (13 years ago)

Detailed specifications

A4-4000 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 GHz	3 GHz
Boost clock speed	3.2 GHz	3 GHz
L1 cache	128 KB (per core)	128 KB (per core)
L2 cache	1 MB (per core)	1 MB (per core)
L3 cache	0 KB	0 KB
Chip lithography	32 nm	32 nm
Die size	246 mm²	228 mm²
Maximum case temperature (TCase)	70 °C	no data
Number of transistors	1,178 million	1,178 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	-	+

Compatibility

Information on A4-4000 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	FM2	FM1
Power consumption (TDP)	65 Watt	100 Watt

Virtualization technologies

Virtual machine speed-up technologies supported by A4-4000 and A8-3870K are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by A4-4000 and A8-3870K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare

AMD Radeon HD 7480D

AMD Radeon HD 6550D

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.

A4-4000 0.72

A8-3870K 1.47
+104%

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.

A4-4000 1146

A8-3870K 2328
+103%

Gaming performance

Pros & cons summary

Performance score	0.72	1.47
Integrated graphics card	0.72	1.04
Recency	1 June 2013	20 December 2011
Physical cores	2	4
Threads	2	4
Power consumption (TDP)	65 Watt	100 Watt

A4-4000 has an age advantage of 1 year, and 53.8% lower power consumption.

A8-3870K, on the other hand, has a 104.2% higher aggregate performance score, 44.4% faster integrated GPU, and 100% more physical cores and 100% more threads.

The A8-3870K is our recommended choice as it beats the A4-4000 in performance tests.

Should you still have questions on choice between A4-4000 and A8-3870K, ask them in Comments section, and we shall answer.