Athlon II X2 255 vs i5-540M

Primary details

Comparing Core i5-540M and Athlon II X2 255 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2377	2664
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.02
Market segment	Laptop	Desktop processor
Series	Intel Core i5	no data
Power efficiency	3.08	1.08
Architecture codename	Arrandale (2010−2011)	Regor (2009−2013)
Release date	7 January 2010 (14 years ago)	25 January 2010 (14 years ago)
Launch price (MSRP)	$257	$60

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i5-540M 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	2 (Dual-core)	2 (Dual-core)
Threads	4	2
Base clock speed	2.53 GHz	3.1 GHz
Boost clock speed	3.07 GHz	3.1 GHz
Bus type	DMI 1.0	no data
Bus rate	1 × 2.5 GT/s	no data
Multiplier	19	no data
L1 cache	64K (per core)	128 KB
L2 cache	256K (per core)	1 MB
L3 cache	3 MB (shared)	0 KB
Chip lithography	32 nm	45 nm
Die size	81+114 mm2	117 mm2
Maximum core temperature	105 °C	no data
Number of transistors	382+177 Million	410 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i5-540M 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 (Uniprocessor)	1
Socket	BGA1288,PGA988	AM3
Power consumption (TDP)	35 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-540M and Athlon II X2 255. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	no data
AES-NI	+	-
FMA	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	+	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Flex Memory Access	+	no data
PAE	36 Bit	no data
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Core i5-540M and Athlon II X2 255 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-540M and Athlon II X2 255 are enumerated here.

VT-d	+	no data
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-540M and Athlon II X2 255. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	8 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	17.051 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® HD Graphics for Previous Generation Intel® Processors	no data
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	766 MHz	no data

Graphics interfaces

Available interfaces and connections of Core i5-540M and Athlon II X2 255 integrated GPUs.

Number of displays supported

2

no data

Peripherals

Specifications and connection of peripherals supported by Core i5-540M and Athlon II X2 255.

PCIe version	2.0	2.0
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.

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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.

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Pros & cons summary

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Performance score	1.14	0.74
Threads	4	2
Chip lithography	32 nm	45 nm
Power consumption (TDP)	35 Watt	65 Watt

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Should you still have questions on choice between Core i5-540M and Athlon II X2 255, ask them in Comments section, and we shall answer.

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