Athlon II X3 400e vs Pentium G645

Primary details

Comparing Pentium G645 and Athlon II X3 400e processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2533	2581
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.06	0.07
Market segment	Desktop processor	Desktop processor
Power efficiency	1.31	1.75
Architecture codename	Sandy Bridge (2011−2013)	Rana (2009−2011)
Release date	2 September 2012 (12 years ago)	20 October 2009 (15 years ago)
Launch price (MSRP)	$80	$107

Cost-effectiveness evaluation

Performance per price, higher is better.

Athlon II X3 400e has 17% better value for money than Pentium G645.

Detailed specifications

Pentium G645 and Athlon II X3 400e 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)	3 (Tri-Core)
Threads	2	3
Base clock speed	2.9 GHz	2.2 GHz
Boost clock speed	2.9 GHz	2.2 GHz
Bus rate	5 GT/s	no data
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	131 mm2	169 mm2
Maximum core temperature	69 °C	no data
Number of transistors	504 million	300 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Pentium G645 and Athlon II X3 400e 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	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium G645 and Athlon II X3 400e. 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	+	-
AVX	+	-
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
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Pentium G645 and Athlon II X3 400e 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 Pentium G645 and Athlon II X3 400e 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 Pentium G645 and Athlon II X3 400e. 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	17 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics for 2nd Generation Intel Processors	On certain motherboards (Chipset feature)
Graphics max frequency	1.1 GHz	no data

Graphics interfaces

Available interfaces and connections of Pentium G645 and Athlon II X3 400e integrated GPUs.

Number of displays supported

2

no data

Peripherals

Specifications and connection of peripherals supported by Pentium G645 and Athlon II X3 400e.

PCIe version

2.0

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.

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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	0.90	0.83
Recency	2 September 2012	20 October 2009
Physical cores	2	3
Threads	2	3
Chip lithography	32 nm	45 nm
Power consumption (TDP)	65 Watt	45 Watt

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Should you still have questions on choice between Pentium G645 and Athlon II X3 400e, ask them in Comments section, and we shall answer.

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