A8-3870K vs FX-4100

Place in the ranking	2085	2177
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	1.64	1.39
Architecture codename	Zambezi (2011−2012)	Llano (2011−2012)
Release date	12 October 2011 (13 years ago)	20 December 2011 (13 years ago)

Detailed specifications

FX-4100 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	4 (Quad-Core)	4 (Quad-Core)
Threads	4	4
Base clock speed	3.6 GHz	3 GHz
Boost clock speed	3.8 GHz	3 GHz
L1 cache	192 KB	128 KB (per core)
L2 cache	4096 KB	1 MB (per core)
L3 cache	8192 KB	0 KB
Chip lithography	32 nm	32 nm
Die size	315 mm²	228 mm²
Maximum core temperature	71 °C	no data
Number of transistors	1,200 million	1,178 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	+
P0 Vcore voltage	Min: 1.1 V - Max: 1.4125 V	no data

Compatibility

Information on FX-4100 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	AM3+	FM1
Power consumption (TDP)	95 Watt	100 Watt

Technologies and extensions

Technological solutions and additional instructions supported by FX-4100 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 FX-4100 and A8-3870K are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by FX-4100 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

no data

AMD Radeon HD 6550D

Peripherals

Specifications and connection of peripherals supported by FX-4100 and A8-3870K.

PCIe version

n/a

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.

FX-4100 1.65
+12.2%

A8-3870K 1.47

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.

FX-4100 2617
+12.4%

A8-3870K 2328