Athlon II X4 645 vs Ryzen 7 1700X

Primary details

Comparing Ryzen 7 1700X and Athlon II X4 645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	779	2155
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.54	3.30
Market segment	Desktop processor	Desktop processor
Series	AMD Ryzen 7	no data
Power efficiency	9.82	1.47
Architecture codename	Zen (2017−2020)	Propus (2009−2011)
Release date	2 March 2017 (7 years ago)	21 September 2010 (14 years ago)
Launch price (MSRP)	$399	$80

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 7 1700X has 7% better value for money than Athlon II X4 645.

Detailed specifications

Ryzen 7 1700X 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	8 (Octa-Core)	4 (Quad-Core)
Threads	16	4
Base clock speed	3.4 GHz	3.1 GHz
Boost clock speed	3.8 GHz	3.1 GHz
Bus rate	4 × 8 GT/s	no data
Multiplier	34	no data
L1 cache	768 KB	128 KB (per core)
L2 cache	4096 KB	512 KB (per core)
L3 cache	16384 KB	0 KB
Chip lithography	14 nm	45 nm
Die size	192 mm2	169 mm2
Number of transistors	4,800 million	300 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-

Compatibility

Information on Ryzen 7 1700X 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)	95 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 7 1700X 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	+	-
FMA	FMA3	-
AVX	+	-
XFR	+	-
SenseMI	+	-

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 7 1700X and Athlon II X4 645 are enumerated here.

AMD-V

+

-

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 7 1700X 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

Peripherals

Specifications and connection of peripherals supported by Ryzen 7 1700X and Athlon II X4 645.

PCIe version	n/a	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	9.86	1.48
Recency	2 March 2017	21 September 2010
Physical cores	8	4
Threads	16	4
Chip lithography	14 nm	45 nm

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Should you still have questions on choice between Ryzen 7 1700X and Athlon II X4 645, ask them in Comments section, and we shall answer.

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