Sempron 145 vs Athlon II X4 638

Place in the ranking	2194	3075
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	2.07	0.69
Architecture codename	Llano (2011−2012)	Sargas (2009−2011)
Release date	6 February 2012 (12 years ago)	1 September 2010 (14 years ago)
Launch price (MSRP)	no data	$95

Detailed specifications

Athlon II X4 638 and Sempron 145 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)	1 (Single-Core)
Threads	4	1
Base clock speed	2.7 GHz	2.8 GHz
Boost clock speed	2.7 GHz	2.8 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	45 nm
Die size	228 mm²	117 mm²
Number of transistors	1,178 million	234 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Athlon II X4 638 and Sempron 145 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	FM1	AM3
Power consumption (TDP)	65 Watt	45 Watt

Virtualization technologies

Virtual machine speed-up technologies supported by Athlon II X4 638 and Sempron 145 are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 638 and Sempron 145. 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 638 and Sempron 145.

PCIe version

no data

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 638 1.42
+330%

Sempron 145 0.33

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 638 2250
+334%

Sempron 145 518

Gaming performance

Pros & cons summary

Performance score	1.42	0.33
Recency	6 February 2012	1 September 2010
Physical cores	4	1
Threads	4	1
Chip lithography	32 nm	45 nm
Power consumption (TDP)	65 Watt	45 Watt

Athlon II X4 638 has a 330.3% higher aggregate performance score, an age advantage of 1 year, 300% more physical cores and 300% more threads, and a 40.6% more advanced lithography process.

Sempron 145, on the other hand, has 44.4% lower power consumption.

The Athlon II X4 638 is our recommended choice as it beats the Sempron 145 in performance tests.

Should you still have questions on choice between Athlon II X4 638 and Sempron 145, ask them in Comments section, and we shall answer.