Ryzen 9 5900X vs Pentium Gold 6405U

Primary details

Comparing Pentium Gold 6405U and Ryzen 9 5900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2026	200
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	31.04
Market segment	Laptop	Desktop processor
Series	Intel Comet Lake	AMD Ryzen 9
Power efficiency	10.94	22.20
Architecture codename	Comet Lake-U (2019−2020)	Vermeer (Zen3) (2020−2022)
Release date	31 October 2019 (5 years ago)	8 October 2020 (4 years ago)
Launch price (MSRP)	$161	$549

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium Gold 6405U and Ryzen 9 5900X 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)	12 (Dodeca-Core)
Threads	4	24
Base clock speed	2.4 GHz	3.7 GHz
Boost clock speed	2.4 GHz	4.8 GHz
Bus rate	4 GT/s	no data
Multiplier	no data	37
L1 cache	256 KB	768 KB
L2 cache	1 MB	6 MB
L3 cache	2 MB	64 MB
Chip lithography	14 nm	7 nm, 12 nm
Die size	no data	2x 74 mm2(CCD) + 125 mm2 (IOD)
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	no data	95 °C
Number of transistors	no data	0 Million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	-	+

Compatibility

Information on Pentium Gold 6405U and Ryzen 9 5900X 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	FCBGA1528	AM4
Power consumption (TDP)	15 Watt	105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium Gold 6405U and Ryzen 9 5900X. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2
AES-NI	+	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	no data
Speed Shift	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Flex Memory Access	+	no data
Precision Boost 2	no data	+

Security technologies

Pentium Gold 6405U and Ryzen 9 5900X technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data
Secure Key	+	no data
Identity Protection	+	-
SGX	Yes with Intel® ME	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium Gold 6405U and Ryzen 9 5900X are enumerated here.

AMD-V	+	+
VT-d	+	no data
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium Gold 6405U and Ryzen 9 5900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR4-3200
Maximum memory size	64 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	37.5 GB/s	51.196 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® UHD Graphics for 10th Gen Intel® Processors	-
Max video memory	32 GB	-
Quick Sync Video	+	-
Clear Video	+	-
Clear Video HD	+	-
Graphics max frequency	950 MHz	-

Graphics interfaces

Available interfaces and connections of Pentium Gold 6405U and Ryzen 9 5900X integrated GPUs.

Number of displays supported	3	-
eDP	+	-
DisplayPort	+	-
HDMI	+	-
DVI	+	-

Graphics image quality

Maximum display resolutions supported by Pentium Gold 6405U and Ryzen 9 5900X integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	-
Max resolution over HDMI 1.4	4096x2304@24Hz	-
Max resolution over eDP	4096x2304@60Hz	-
Max resolution over DisplayPort	4096x2304@60Hz	-

Graphics API support

APIs supported by Pentium Gold 6405U and Ryzen 9 5900X integrated GPUs, sometimes API versions are included.

DirectX	12	-
OpenGL	4.5	-

Peripherals

Specifications and connection of peripherals supported by Pentium Gold 6405U and Ryzen 9 5900X.

PCIe version	2.0	4.0
PCI Express lanes	12	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	1.80	25.56
Recency	31 October 2019	8 October 2020
Physical cores	2	12
Threads	4	24
Chip lithography	14 nm	7 nm
Power consumption (TDP)	15 Watt	105 Watt

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Should you still have questions on choice between Pentium Gold 6405U and Ryzen 9 5900X, ask them in Comments section, and we shall answer.

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