Ryzen Threadripper PRO 3945WX vs i9-9900KF

Primary details

Comparing Core i9-9900KF and Ryzen Threadripper PRO 3945WX processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	686	260
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	8.49	no data
Market segment	Desktop processor	Server
Series	Intel Core i9	AMD Ryzen Threadripper
Power efficiency	11.38	7.10
Architecture codename	Coffee Lake-R (2018−2019)	Matisse (2019−2020)
Release date	8 January 2019 (5 years ago)	14 July 2020 (4 years ago)
Launch price (MSRP)	$488	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-9900KF and Ryzen Threadripper PRO 3945WX 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)	12 (Dodeca-Core)
Threads	16	24
Base clock speed	3.6 GHz	4 GHz
Boost clock speed	5 GHz	4.3 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	no data	40
L1 cache	64K (per core)	64K (per core)
L2 cache	256K (per core)	512K (per core)
L3 cache	16 MB (shared)	64 MB
Chip lithography	14 nm	7 nm, 12 nm
Die size	no data	74 mm2
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	72 °C	95 °C
Number of transistors	no data	3,800 million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	+

Compatibility

Information on Core i9-9900KF and Ryzen Threadripper PRO 3945WX 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	FCLGA1151	TR4
Power consumption (TDP)	95 Watt	280 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9900KF and Ryzen Threadripper PRO 3945WX. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	no data
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	-
Idle States	+	no data
Thermal Monitoring	+	-

Security technologies

Core i9-9900KF and Ryzen Threadripper PRO 3945WX technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9900KF and Ryzen Threadripper PRO 3945WX 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 Core i9-9900KF and Ryzen Threadripper PRO 3945WX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR4-3200
Maximum memory size	128 GB	2 TiB
Max memory channels	2	no data
Maximum memory bandwidth	42.671 GB/s	204.8 GB/s

Peripherals

Specifications and connection of peripherals supported by Core i9-9900KF and Ryzen Threadripper PRO 3945WX.

PCIe version	3.0	4.0
PCI Express lanes	16	128

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	11.48	21.12
Recency	8 January 2019	14 July 2020
Physical cores	8	12
Threads	16	24
Chip lithography	14 nm	7 nm
Power consumption (TDP)	95 Watt	280 Watt

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Should you still have questions on choice between Core i9-9900KF and Ryzen Threadripper PRO 3945WX, ask them in Comments section, and we shall answer.

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