Athlon II X4 645 vs Ryzen 5 1400

Primary details

Comparing Ryzen 5 1400 and Athlon II X4 645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1227	2146
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.78	3.30
Market segment	Desktop processor	Desktop processor
Series	AMD Ryzen 5	no data
Power efficiency	7.11	1.47
Architecture codename	Zen (2017−2020)	Propus (2009−2011)
Release date	16 March 2017 (7 years ago)	21 September 2010 (14 years ago)
Launch price (MSRP)	$169	$80

Cost-effectiveness evaluation

Performance per price, higher is better.

Athlon II X4 645 has 19% better value for money than Ryzen 5 1400.

Detailed specifications

Ryzen 5 1400 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	4 (Quad-Core)	4 (Quad-Core)
Threads	8	4
Base clock speed	3.2 GHz	3.1 GHz
Boost clock speed	3.2 GHz	3.1 GHz
Bus rate	4 × 8 GT/s	no data
Multiplier	32	no data
L1 cache	384 KB	128 KB (per core)
L2 cache	2 MB	512 KB (per core)
L3 cache	8 MB (shared)	0 KB
Chip lithography	14 nm	45 nm
Die size	213 mm2	169 mm2
Number of transistors	4800 Million	300 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-

Compatibility

Information on Ryzen 5 1400 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 (Uniprocessor)	1
Socket	AM4	AM3
Power consumption (TDP)	65 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 5 1400 and Athlon II X4 645. You'll probably need this information if you require some particular technology.

Instruction set extensions	XFR, FMA3, SSE 4.2, AVX2, SMT	no data
AES-NI	+	-
AVX	+	-

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 5 1400 and Athlon II X4 645 are enumerated here.

AMD-V

+

-

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 5 1400 and Athlon II X4 645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR3
Maximum memory size	64 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	42.671 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Ryzen 5 1400 and Athlon II X4 645.

PCIe version	3.0	2.0
PCI Express lanes	20	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	5.07	1.53
Recency	16 March 2017	21 September 2010
Threads	8	4
Chip lithography	14 nm	45 nm
Power consumption (TDP)	65 Watt	95 Watt

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Should you still have questions on choice between Ryzen 5 1400 and Athlon II X4 645, ask them in Comments section, and we shall answer.

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