Athlon 64 X2 4400+ vs Athlon X4 840

Place in the ranking	1890	2980
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Series	4x Athlon	2x Athlon 64 (Desktop)
Power efficiency	3.04	0.61
Architecture codename	Kaveri (2014−2015)	Windsor (2006−2007)
Release date	August 2014 (10 years ago)	no data

Detailed specifications

Athlon X4 840 and Athlon 64 X2 (Desktop) 4400+ 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	3.1 GHz	no data
Boost clock speed	3.8 GHz	2.2 GHz
Bus rate	no data	1000 MHz
L1 cache	256K	256K
L2 cache	4 MB	512K
L3 cache	no data	0 KB
Chip lithography	28 nm	90 nm
Die size	245 mm²	220 mm²
Maximum case temperature (TCase)	72 °C	no data
Number of transistors	2,411 million	233 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-

Compatibility

Information on Athlon X4 840 and Athlon 64 X2 (Desktop) 4400+ 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	Socket FM2+	939
Power consumption (TDP)	65 watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Athlon X4 840 and Athlon 64 X2 (Desktop) 4400+. 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 Athlon X4 840 and Athlon 64 X2 (Desktop) 4400+ are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon X4 840 and Athlon 64 X2 (Desktop) 4400+. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

no data

Peripherals

Specifications and connection of peripherals supported by Athlon X4 840 and Athlon 64 X2 (Desktop) 4400+.

PCIe version	3.0	no data
PCI Express lanes	16	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 840 2.09
+398%

Athlon 64 X2 4400+ 0.42

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 840 3318
+392%

Athlon 64 X2 4400+ 675

Gaming performance

Pros & cons summary

Performance score	2.09	0.42
Physical cores	4	2
Threads	4	2
Chip lithography	28 nm	90 nm

Athlon X4 840 has a 397.6% higher aggregate performance score, 100% more physical cores and 100% more threads, and a 221.4% more advanced lithography process.

The Athlon X4 840 is our recommended choice as it beats the Athlon 64 X2 4400+ in performance tests.

Should you still have questions on choice between Athlon X4 840 and Athlon 64 X2 4400+, ask them in Comments section, and we shall answer.