Phenom II X3 P840 vs FX-4300

Place in the ranking	1988	2598
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.35	no data
Market segment	Desktop processor	Laptop
Series	no data	3x AMD Phenom II
Power efficiency	1.87	3.10
Architecture codename	Vishera (2012−2015)	Champlain (2010−2011)
Release date	23 October 2012 (12 years ago)	4 October 2010 (14 years ago)
Launch price (MSRP)	$122	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

FX-4300 and Phenom II X3 P840 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)	3 (Tri-Core)
Threads	4	3
Base clock speed	3.8 GHz	no data
Boost clock speed	4 GHz	1.9 GHz
Bus rate	no data	3600 MHz
L1 cache	no data	384 KB
L2 cache	4096 KB	1.5 MB
Chip lithography	32 nm	45 nm
Die size	315 mm²	no data
Maximum core temperature	71 °C	no data
Number of transistors	1,200 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-
P0 Vcore voltage	Min: 1.225 V - Max: 1.3875 V	no data

Compatibility

Information on FX-4300 and Phenom II X3 P840 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	no data
Socket	AM3+	S1
Power consumption (TDP)	95 Watt	25 Watt

Technologies and extensions

Technological solutions and additional instructions supported by FX-4300 and Phenom II X3 P840. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Virtualization, AMD64, Advanced Virus Protection, SSE(1,2,3,4a)
AES-NI	+	-
FMA	+	-
AVX	+	-
VirusProtect	-	+

Virtualization technologies

Virtual machine speed-up technologies supported by FX-4300 and Phenom II X3 P840 are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by FX-4300 and Phenom II X3 P840. 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

On certain motherboards (Chipset feature)

no data

Peripherals

Specifications and connection of peripherals supported by FX-4300 and Phenom II X3 P840.

PCIe version

n/a

no data

Gaming performance

Pros & cons summary

Performance score	1.88	0.82
Recency	23 October 2012	4 October 2010
Physical cores	4	3
Threads	4	3
Chip lithography	32 nm	45 nm
Power consumption (TDP)	95 Watt	25 Watt

FX-4300 has a 129.3% higher aggregate performance score, an age advantage of 2 years, 33.3% more physical cores and 33.3% more threads, and a 40.6% more advanced lithography process.

Phenom II X3 P840, on the other hand, has 280% lower power consumption.

The FX-4300 is our recommended choice as it beats the Phenom II X3 P840 in performance tests.

Note that FX-4300 is a desktop processor while Phenom II X3 P840 is a notebook one.

Should you still have questions on choice between FX-4300 and Phenom II X3 P840, ask them in Comments section, and we shall answer.