i9-9900X vs i7-3960X

Primary details

Comparing Core i7-3960X and Core i9-9900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1170	534
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.37	4.90
Market segment	Desktop processor	Desktop processor
Series	Core i7 (Desktop)	Intel Core i9
Power efficiency	3.87	7.89
Architecture codename	Sandy Bridge-E (2011−2013)	Skylake (server) (2017−2018)
Release date	14 November 2011 (13 years ago)	19 October 2018 (6 years ago)
Launch price (MSRP)	$861	$989

Cost-effectiveness evaluation

Performance per price, higher is better.

i9-9900X has 1224% better value for money than i7-3960X.

Detailed specifications

Core i7-3960X and Core i9-9900X 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	6 (Hexa-Core)	10 (Deca-Core)
Threads	12	20
Base clock speed	3.3 GHz	3.5 GHz
Boost clock speed	3.9 GHz	4.5 GHz
Bus type	no data	DMI 3.0
Bus rate	5 GT/s	4 × 8 GT/s
Multiplier	no data	35
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	1 MB (per core)
L3 cache	15 MB (shared)	19.25 MB (shared)
Chip lithography	32 nm	14 nm
Die size	435 mm2	no data
Maximum core temperature	no data	92 °C
Maximum case temperature (TCase)	67 °C	72 °C
Number of transistors	2,270 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	+	+

Compatibility

Information on Core i7-3960X and Core i9-9900X 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 (Uniprocessor)
Socket	FCLGA2011	FCLGA2066
Power consumption (TDP)	130 Watt	165 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3960X and Core i9-9900X. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	-	+
Idle States	+	no data
Thermal Monitoring	+	-
Smart Response	+	no data
Demand Based Switching	-	no data
Turbo Boost Max 3.0	no data	+

Security technologies

Core i7-3960X and Core i9-9900X technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	+
Identity Protection	+	-

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3960X and Core i9-9900X are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3960X and Core i9-9900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-2666
Maximum memory size	64 GB	128 GB
Max memory channels	4	4
Maximum memory bandwidth	51.2 GB/s	85.33 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by Core i7-3960X and Core i9-9900X.

PCIe version	2.0	3.0
PCI Express lanes	40	44

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	5.32	13.76
Recency	14 November 2011	19 October 2018
Physical cores	6	10
Threads	12	20
Chip lithography	32 nm	14 nm
Power consumption (TDP)	130 Watt	165 Watt

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Should you still have questions on choice between Core i7-3960X and Core i9-9900X, ask them in Comments section, and we shall answer.

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