A6-6420K vs i9-7900X

Primary details

Comparing Core i9-7900X and A6-6420K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	558	2457
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.90	no data
Market segment	Desktop processor	Desktop processor
Series	Core i9 (Desktop)	no data
Power efficiency	8.96	1.44
Architecture codename	Skylake (server) (2017−2019)	Richland (2013−2014)
Release date	30 May 2017 (7 years ago)	January 2014 (10 years ago)
Launch price (MSRP)	$999	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-7900X and A6-6420K 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	10 (Deca-Core)	2 (Dual-core)
Threads	20	2
Base clock speed	3.3 GHz	4 GHz
Boost clock speed	4.5 GHz	4.2 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	33	no data
L1 cache	640 KB	96 KB
L2 cache	10 MB	1024 KB
L3 cache	13.75 MB	no data
Chip lithography	14 nm	32 nm
Die size	no data	246 mm2
Maximum core temperature	95 °C	70 °C
Maximum case temperature (TCase)	72 °C	70 °C
Number of transistors	no data	1,303 million
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	+

Compatibility

Information on Core i9-7900X and A6-6420K 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	Socket R4	FM2
Power consumption (TDP)	140 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7900X and A6-6420K. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	no data
AES-NI	+	+
FMA	-	+
AVX	+	+
PowerNow	-	+
PowerGating	-	+
VirusProtect	-	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	-
Turbo Boost Max 3.0	+	no data

Security technologies

Core i9-7900X and A6-6420K technologies aimed at improving security, for example, by protecting against hacks.

EDB

+

no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7900X and A6-6420K are enumerated here.

AMD-V	+	+
VT-d	+	no data
VT-x	+	no data
IOMMU 2.0	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7900X and A6-6420K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR3-1866
Maximum memory size	128 GB	no data
Max memory channels	4	2
Maximum memory bandwidth	85.33 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	N/A	AMD Radeon HD 8470D
Number of pipelines	no data	192
Enduro	-	+
Switchable graphics	-	+
UVD	-	+

Graphics interfaces

Available interfaces and connections of Core i9-7900X and A6-6420K integrated GPUs.

DisplayPort	-	+
HDMI	-	+

Graphics API support

APIs supported by Core i9-7900X and A6-6420K integrated GPUs, sometimes API versions are included.

DirectX

no data

DirectX® 11

Peripherals

Specifications and connection of peripherals supported by Core i9-7900X and A6-6420K.

PCIe version	3.0	2.0
PCI Express lanes	44	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	13.76	1.03
Physical cores	10	2
Threads	20	2
Chip lithography	14 nm	32 nm
Power consumption (TDP)	140 Watt	65 Watt

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Should you still have questions on choice between Core i9-7900X and A6-6420K, ask them in Comments section, and we shall answer.

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