Athlon II X2 255 vs Athlon II X4 620e

Place in the ranking	1970	2636
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.02
Market segment	Desktop processor	Desktop processor
Power efficiency	3.84	1.08
Architecture codename	Propus (2009−2011)	Regor (2009−2013)
Release date	3 May 2011 (13 years ago)	25 January 2010 (14 years ago)
Launch price (MSRP)	no data	$60

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Athlon II X4 620e and Athlon II X2 255 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	2.6 GHz	3.1 GHz
Boost clock speed	2.6 GHz	3.1 GHz
L1 cache	128 KB (per core)	128 KB
L2 cache	512 KB (per core)	1 MB
L3 cache	0 KB	0 KB
Chip lithography	45 nm	45 nm
Die size	169 mm²	117 mm²
Number of transistors	300 million	410 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Athlon II X4 620e and Athlon II X2 255 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	AM3
Power consumption (TDP)	45 Watt	65 Watt

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 620e and Athlon II X2 255. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

Peripherals

Specifications and connection of peripherals supported by Athlon II X4 620e and Athlon II X2 255.

PCIe version

2.0

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 II X4 620e 1.90
+147%

Athlon II X2 255 0.77

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 II X4 620e 2906
+147%

Athlon II X2 255 1175

Gaming performance

Pros & cons summary

Performance score	1.90	0.77
Recency	3 May 2011	25 January 2010
Physical cores	4	2
Threads	4	2
Power consumption (TDP)	45 Watt	65 Watt

Athlon II X4 620e has a 146.8% higher aggregate performance score, an age advantage of 1 year, 100% more physical cores and 100% more threads, and 44.4% lower power consumption.

The Athlon II X4 620e is our recommended choice as it beats the Athlon II X2 255 in performance tests.

Should you still have questions on choice between Athlon II X4 620e and Athlon II X2 255, ask them in Comments section, and we shall answer.