Ryzen 5 8640U vs Mobile Sempron SI-40

Place in the ranking	3216	565
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	AMD Mobile Sempron	no data
Power efficiency	0.76	44.61
Architecture codename	Sable (2008−2009)	Hawk Point-U (Zen 4) (2023)
Release date	4 July 2008 (16 years ago)	6 December 2023 (less than a year ago)

Detailed specifications

Mobile Sempron SI-40 and Ryzen 5 8640U 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	1 (Single-Core)	6 (Hexa-Core)
Threads	1	12
Base clock speed	no data	3.5 GHz
Boost clock speed	2 GHz	4.9 GHz
Bus rate	1800 MHz	no data
L1 cache	no data	64 KB (per core)
L2 cache	512 KB	1 MB (per core)
L3 cache	no data	16 MB (shared)
Chip lithography	65 nm	4 nm
Die size	no data	178 mm²
Maximum core temperature	100 °C	100 °C
Number of transistors	no data	25,000 million
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Mobile Sempron SI-40 and Ryzen 5 8640U 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	no data	1
Socket	S1g2	FP8
Power consumption (TDP)	25 Watt	28 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Mobile Sempron SI-40 and Ryzen 5 8640U. You'll probably need this information if you require some particular technology.

Instruction set extensions	65 nm, 1.075 - 1.125V	Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3
AES-NI	-	+
AVX	-	+
Precision Boost 2	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Mobile Sempron SI-40 and Ryzen 5 8640U are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by Mobile Sempron SI-40 and Ryzen 5 8640U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

no data

DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

AMD Radeon 760M ( - 2600 MHz)

Peripherals

Specifications and connection of peripherals supported by Mobile Sempron SI-40 and Ryzen 5 8640U.

PCIe version	no data	4.0
PCI Express lanes	no data	20

Gaming performance

Pros & cons summary

Performance score	0.20	13.20
Recency	4 July 2008	6 December 2023
Physical cores	1	6
Threads	1	12
Chip lithography	65 nm	4 nm
Power consumption (TDP)	25 Watt	28 Watt

Mobile Sempron SI-40 has 12% lower power consumption.

Ryzen 5 8640U, on the other hand, has a 6500% higher aggregate performance score, an age advantage of 15 years, 500% more physical cores and 1100% more threads, and a 1525% more advanced lithography process.

The Ryzen 5 8640U is our recommended choice as it beats the Mobile Sempron SI-40 in performance tests.

Should you still have questions on choice between Mobile Sempron SI-40 and Ryzen 5 8640U, ask them in Comments section, and we shall answer.