Athlon II X4 645 vs Core i3-2105

General info

Comparing Core i3-2105 and Athlon II X4 645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	2208	2006
Place by popularity	not in top-100	not in top-100
Value for money	0.11	3.30
Market segment	Desktop processor	Desktop processor
Architecture codename	Sandy Bridge (2011−2013)	Propus (2009−2011)
Release date	22 May 2011 (12 years old)	21 September 2010 (13 years old)
Launch price (MSRP)	$145	$80
Current price	$42 (0.3x MSRP)	$29 (0.4x MSRP)

Athlon II X4 645 has 2900% better value for money than i3-2105.

Technical specs

Core i3-2105 and Athlon II X4 645 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)	4 (Quad-Core)
Threads	4	4
Base clock speed	3.1 GHz	3.1 GHz
Boost clock speed	3.1 GHz	3.1 GHz
L1 cache	64 KB (per core)	128 KB (per core)
L2 cache	256 KB (per core)	512 KB (per core)
L3 cache	3 MB (shared)	0 KB
Chip lithography	32 nm	45 nm
Die size	no data	169 mm2
Maximum core temperature	69 °C	no data
Number of transistors	no data	300 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Core i3-2105 and Athlon II X4 645 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	FCLGA1155	AM3
Power consumption (TDP)	65 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i3-2105 and Athlon II X4 645. You'll probably need this information if you require some particular technology.

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

Security technologies

Core i3-2105 and Athlon II X4 645 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data
Identity Protection	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i3-2105 and Athlon II X4 645 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 i3-2105 and Athlon II X4 645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	32 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	21 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 3000	no data
Quick Sync Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	1.1 GHz	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i3-2105 and Athlon II X4 645 integrated GPUs.

Number of displays supported

2

no data

Peripherals

Specifications and connection of peripherals supported by Core i3-2105 and Athlon II X4 645.

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.

Athlon II X4 645 outperforms Core i3-2105 by 26% based on our aggregated benchmark results.

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Advantages and disadvantages

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Performance score	1.21	1.53
Recency	22 May 2011	21 September 2010
Physical cores	2	4
Cost	$145	$80
Chip lithography	32 nm	45 nm
Power consumption (TDP)	65 Watt	95 Watt

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Should you still have questions on choice between Core i3-2105 and Athlon II X4 645, ask them in Comments section, and we shall answer.

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