Ryzen 5 PRO 8645HS vs Ryzen Threadripper 3990X

Primary details

Comparing Ryzen Threadripper 3990X and Ryzen 5 PRO 8645HS processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	28	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	12.87	no data
Market segment	Desktop processor	Server
Series	AMD Ryzen Threadripper	no data
Architecture codename	Matisse (2019−2020)	Hawk Point
Release date	25 November 2019 (4 years ago)	16 April 2024 (less than a year ago)
Launch price (MSRP)	$3,999	no data
Current price	$3550 (0.9x MSRP)	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen Threadripper 3990X and Ryzen 5 PRO 8645HS 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	64 (Tetrahexaconta-Core)	6 (Hexa-Core)
Threads	128	12
Base clock speed	2.9 GHz	4.3 GHz
Boost clock speed	4.3 GHz	5 GHz
L1 cache	4 MB	64 KB (per core)
L2 cache	32 MB	1 MB (per core)
L3 cache	256 MB	16 MB (shared)
Chip lithography	7 nm, 12 nm	4 nm
Die size	74 mm2	178 mm2
Maximum case temperature (TCase)	95 °C	no data
Number of transistors	38740 Million	25,000 million
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	Yes	No

Compatibility

Information on Ryzen Threadripper 3990X and Ryzen 5 PRO 8645HS 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	TR4	FP7
Power consumption (TDP)	280 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen Threadripper 3990X and Ryzen 5 PRO 8645HS. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen Threadripper 3990X and Ryzen 5 PRO 8645HS are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen Threadripper 3990X and Ryzen 5 PRO 8645HS. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5
Maximum memory size	256 GB	no data
Max memory channels	4	no data
Maximum memory bandwidth	102.403 GB/s	no data
ECC memory support	+	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

-

AMD Radeon 760M

Peripherals

Specifications and connection of peripherals supported by Ryzen Threadripper 3990X and Ryzen 5 PRO 8645HS.

PCIe version	4.0	4.0
PCI Express lanes	no data	20

Pros & cons summary

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Recency	25 November 2019	16 April 2024
Physical cores	64	6
Threads	128	12
Chip lithography	7 nm	4 nm
Power consumption (TDP)	280 Watt	45 Watt

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