Ryzen 9 9900X vs Ryzen 9 7845HX

Primary details

Comparing Ryzen 9 7845HX and Ryzen 9 9900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	158	109
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	66.85
Market segment	Laptop	Desktop processor
Power efficiency	49.19	27.10
Architecture codename	Dragon Range-HX (Zen 4) (2023−2024)	Granite Ridge (2024)
Release date	4 January 2023 (1 year ago)	15 August 2024 (less than a year ago)
Launch price (MSRP)	no data	$499

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 7845HX and Ryzen 9 9900X 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	12 (Dodeca-Core)	12 (Dodeca-Core)
Threads	24	24
Base clock speed	3 GHz	4.4 GHz
Boost clock speed	5.2 GHz	5.6 GHz
L1 cache	64K (per core)	80 KB (per core)
L2 cache	1 MB (per core)	1 MB (per core)
L3 cache	64 MB (shared)	64 MB (shared)
Chip lithography	CCD = 5 nm, I/O = 6 nm	4 nm
Die size	2x 71 mm2	2x 70.6 mm2
Maximum core temperature	100 °C	95 °C
Number of transistors	13,140 million	16,630 million
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	+

Compatibility

Information on Ryzen 9 7845HX and Ryzen 9 9900X 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	FL1	AM5
Power consumption (TDP)	55 Watt	120 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 7845HX and Ryzen 9 9900X. You'll probably need this information if you require some particular technology.

Instruction set extensions	MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME	SMT, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A
AES-NI	+	+
FMA	+	-
AVX	+	+
Precision Boost 2	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 7845HX and Ryzen 9 9900X are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7845HX and Ryzen 9 9900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR5

DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare

AMD Radeon 610M (400 - 2200 MHz)

AMD Radeon Graphics

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 7845HX and Ryzen 9 9900X.

PCIe version	5.0	5.0
PCI Express lanes	28	24

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	28.74	34.54
Integrated graphics card	2.85	1.98
Recency	4 January 2023	15 August 2024
Power consumption (TDP)	55 Watt	120 Watt

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Should you still have questions on choice between Ryzen 9 7845HX and Ryzen 9 9900X, ask them in Comments section, and we shall answer.

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