Core i7-9800X vs Core i7-6800K

Primary details

Comparing Core i7-6800K and Core i7-9800X processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	939	620
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.39	12.85
Market segment	Desktop processor	Desktop processor
Series	no data	Intel Core i7
Architecture codename	Broadwell-E (2016)	Skylake (server) (2017−2019)
Release date	31 May 2016 (8 years ago)	19 October 2018 (5 years ago)
Launch price (MSRP)	$345	$589
Current price	$195 (0.6x MSRP)	$94 (0.2x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-9800X has 279% better value for money than i7-6800K.

Detailed specifications

Core i7-6800K and Core i7-9800X 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)	8 (Octa-Core)
Threads	12	16
Base clock speed	3.4 GHz	3.8 GHz
Boost clock speed	3.8 GHz	4.5 GHz
Bus support	no data	4 × 8 GT/s
L1 cache	32 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	1 MB (per core)
L3 cache	15 MB (shared)	16.5 MB (shared)
Chip lithography	14 nm	14 nm
Maximum core temperature	67°	95 °C
Maximum case temperature (TCase)	72 °C	72 °C
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	Yes	Yes

Compatibility

Information on Core i7-6800K and Core i7-9800X 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	FCLGA2011	FCLGA2066
Power consumption (TDP)	140 Watt	165 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-6800K and Core i7-9800X. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	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	no data	+
Idle States	+	no data
Smart Response	+	no data
Turbo Boost Max 3.0	+	+
Status	Discontinued	Discontinued

Security technologies

Core i7-6800K and Core i7-9800X technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-6800K and Core i7-9800X are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-6800K and Core i7-9800X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR4-2666
Maximum memory size	128 GB	128 GB
Max memory channels	4	4
Maximum memory bandwidth	no data	85 GB/s
ECC memory support	-	-

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 i7-6800K and Core i7-9800X.

PCIe version	3.0	3.0
PCI Express lanes	28	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.

Core i7-9800X outperforms Core i7-6800K by 68% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	6.96	11.68
Recency	31 May 2016	19 October 2018
Physical cores	6	8
Threads	12	16
Cost	$345	$589
Power consumption (TDP)	140 Watt	165 Watt

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Should you still have questions on choice between Core i7-6800K and Core i7-9800X, ask them in Comments section, and we shall answer.

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