Core X
Developer	Intel
Manufacturer	Intel
Type	Microprocessors
Introduction	May 30, 2017 (announced)
Architecture	High-performance, high core count x86 desktop processors
µarch	Skylake, Kaby Lake
Word size	64 bit 8 octets 16 nibbles
Process	14 nm 0.014 μm 1.4e-5 mm
Technology	CMOS
Clock	3,300 MHz-4,300 MHz
Package	FCLGA-2066
Socket	Socket R
Succession
←
Core i7 Extreme Edition

Core X is a family of high-performance and high core count 64-bit x86 microprocessors introduced by Intel in mid-2017.

Overview

The Core X family was announced during Computex 2017. Core X is effectively a successor to the Core i7 Extreme Edition family which used to feature Intel's flagship model from each architecture. The Core X family has expanded into a series of models ranging from 6 to 18 cores.

Members

Skylake

See also: Skylake µarch and Skylake X core

Skylake-based Core X processors were introduced at Computex 2017. Those processors incorporate a large number of changes over their Broadwell counterparts which brings along a performance increase in addition to other improvements. Those processors are also the first to incorporate the new AVX-512 extension. All models have the following common features:

• TDP: 140, 165 W
• Mem: Up to 128 GiB of quad-channel DDR4-2666
• I/O: x28 or x44 PCIe Gen 3
• ISA: Everything up to AVX-512 (SMM, FPU, NX, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, AVX, FMA3, AVX2, and AVX-512)
• Tech: Turbo Boost 2.0, Turbo Max 3.0, VT-x, VT-d, and SpeedStep

	List of Skylake-based Core X Processors
	Main processor										Memory	I/O	Features
Model	Price	Launched	Cores	Threads	L2$	L3$	TDP	Frequency	Turbo	TBMT	Memory Type	Max PCIe	Turbo Max
i7-7800X	$ 389.00 € 350.10 £ 315.09 ¥ 40,195.37	26 June 2017	6	12	6 MiB 6,144 KiB 6,291,456 B 0.00586 GiB	8.25 MiB 8,448 KiB 8,650,752 B 0.00806 GiB	140 W 140,000 mW 0.188 hp 0.14 kW	3.5 GHz 3,500 MHz 3,500,000 kHz	4 GHz 4,000 MHz 4,000,000 kHz		DDR4-2400		✘
i7-7820X	$ 599.00 € 539.10 £ 485.19 ¥ 61,894.67	26 June 2017	8	16	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	11 MiB 11,264 KiB 11,534,336 B 0.0107 GiB	140 W 140,000 mW 0.188 hp 0.14 kW	3.6 GHz 3,600 MHz 3,600,000 kHz	4.3 GHz 4,300 MHz 4,300,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz	DDR4-2666		✔
i9-7900X	$ 999.00 € 899.10 £ 809.19 ¥ 103,226.67	26 June 2017	10	20	10 MiB 10,240 KiB 10,485,760 B 0.00977 GiB	13.75 MiB 14,080 KiB 14,417,920 B 0.0134 GiB	140 W 140,000 mW 0.188 hp 0.14 kW	3.3 GHz 3,300 MHz 3,300,000 kHz	4.3 GHz 4,300 MHz 4,300,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz	DDR4-2666		✔
i9-7920X	$ 1,199.00 € 1,079.10 £ 971.19 ¥ 123,892.67	28 August 2017	12	24	12 MiB 12,288 KiB 12,582,912 B 0.0117 GiB	16.5 MiB 16,896 KiB 17,301,504 B 0.0161 GiB	140 W 140,000 mW 0.188 hp 0.14 kW	2.9 GHz 2,900 MHz 2,900,000 kHz	4.3 GHz 4,300 MHz 4,300,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	DDR4-2666		✔
i9-7940X	$ 1,399.00 € 1,259.10 £ 1,133.19 ¥ 144,558.67	25 September 2017	14	28	14 MiB 14,336 KiB 14,680,064 B 0.0137 GiB	19.25 MiB 19,712 KiB 20,185,088 B 0.0188 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	3.1 GHz 3,100 MHz 3,100,000 kHz	4.3 GHz 4,300 MHz 4,300,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	DDR4-2666		✔
i9-7960X	$ 1,699.00 € 1,529.10 £ 1,376.19 ¥ 175,557.67	25 September 2017	16	32	16 MiB 16,384 KiB 16,777,216 B 0.0156 GiB	22 MiB 22,528 KiB 23,068,672 B 0.0215 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	2.8 GHz 2,800 MHz 2,800,000 kHz	4.2 GHz 4,200 MHz 4,200,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	DDR4-2666		✔
i9-7980XE	$ 1,999.00 € 1,799.10 £ 1,619.19 ¥ 206,556.67	25 September 2017	18	36	18 MiB 18,432 KiB 18,874,368 B 0.0176 GiB	24.75 MiB 25,344 KiB 25,952,256 B 0.0242 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	2.6 GHz 2,600 MHz 2,600,000 kHz	4.2 GHz 4,200 MHz 4,200,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	DDR4-2666		✔
Count: 7

Kaby Lake

See also: Kaby Lake µarch and Kaby Lake X core

Kaby Lake-based Core X processors were introduced at Computex 2017 at the same time as the Skylake models. Despite that, those processors are far more similar to the high-end Core i7 (Kaby Lake S core) contemporaries in terms of features and capabilities vs the Skylake Core X variants. Likewise, they do not incorporate some of the more significant features such as a high core count, the cache hierarchy, and AVX-512. Additionally, those processors only support dual-channel memory.

• TDP: 112 W
• Mem: Up to 64 GiB of dual-channel DDR-2666 memory
• I/O: x16 PCIe Gen 3
• ISA: Everything up to AVX2 (SMM, FPU, NX, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, AVX, FMA3, AVX2)
• Tech: Turbo Boost 2.0, Turbo Max 3.0, VT-x, VT-d, and SpeedStep

	List of Kaby Lake-based Core X Processors
	Main processor									Features
Model	Price	Launched	Cores	Threads	L2$	L3$	Frequency	Turbo	TDP	HT
i5-7640X	$ 242.00 € 217.80 £ 196.02 ¥ 25,005.86	26 June 2017	4	4	1 MiB 1,024 KiB 1,048,576 B 9.765625e-4 GiB	6 MiB 6,144 KiB 6,291,456 B 0.00586 GiB	4 GHz 4,000 MHz 4,000,000 kHz	4.2 GHz 4,200 MHz 4,200,000 kHz	112 W 112,000 mW 0.15 hp 0.112 kW	✘
i7-7740X	$ 339.00 € 305.10 £ 274.59 ¥ 35,028.87	26 June 2017	4	8	1 MiB 1,024 KiB 1,048,576 B 9.765625e-4 GiB	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	4.3 GHz 4,300 MHz 4,300,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz	112 W 112,000 mW 0.15 hp 0.112 kW	✔
Count: 2

Skylake Refresh

See also: Skylake X Refresh

In late 2018 Intel refreshed the entire Skylake X lineup. In addition to the higher clock frequencies achieved as a result of utilizing their mature 14 nm process, those processors also makes use of solder thermal interface material instead of a paste, increasing the thermal conductivity and improving the available overclocking headroom. The refreshed lineup got rid of the hexa-core part and eliminates the PCIe lanes-based segmentation, providing x44 PCIe lanes on all models. Additionally, all models under 12 cores come with a larger L3 cache. Most of the low All models have the following common features:

• TDP: 165 W
• Mem: Up to 128 GiB of quad-channel DDR4-2666
• I/O: x44 PCIe Gen 3
• ISA: Everything up to AVX-512 (SMM, FPU, NX, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, AVX, FMA3, AVX2, and AVX-512)
• Tech: Turbo Boost 2.0, Turbo Max 3.0, VT-x, VT-d, and SpeedStep

	List of Skylake Refresh-based Core X Processors
Model	Price	Launched	Cores	Threads	L2$	L3$	TDP	Frequency	Turbo	TBMT
i7-9800X	$ 589.00 € 530.10 £ 477.09 ¥ 60,861.37	November 2018	8	16	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	16.5 MiB 16,896 KiB 17,301,504 B 0.0161 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	3.8 GHz 3,800 MHz 3,800,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz
i9-9820X	$ 898.00 € 808.20 £ 727.38 ¥ 92,790.34	November 2018	10	20	10 MiB 10,240 KiB 10,485,760 B 0.00977 GiB	16.5 MiB 16,896 KiB 17,301,504 B 0.0161 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	3.3 GHz 3,300 MHz 3,300,000 kHz	4.1 GHz 4,100 MHz 4,100,000 kHz	4.2 GHz 4,200 MHz 4,200,000 kHz
i9-9900X	$ 989.00 € 890.10 £ 801.09 ¥ 102,193.37	November 2018	10	20	10 MiB 10,240 KiB 10,485,760 B 0.00977 GiB	19.25 MiB 19,712 KiB 20,185,088 B 0.0188 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	3.5 GHz 3,500 MHz 3,500,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz
i9-9920X	$ 1,189.00 € 1,070.10 £ 963.09 ¥ 122,859.37	November 2018	12	24	12 MiB 12,288 KiB 12,582,912 B 0.0117 GiB	19.25 MiB 19,712 KiB 20,185,088 B 0.0188 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	3.5 GHz 3,500 MHz 3,500,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz
i9-9940X	$ 1,387.00 € 1,248.30 £ 1,123.47 ¥ 143,318.71	November 2018	14	28	14 MiB 14,336 KiB 14,680,064 B 0.0137 GiB	19.25 MiB 19,712 KiB 20,185,088 B 0.0188 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	3.3 GHz 3,300 MHz 3,300,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz
i9-9960X	$ 1,684.00 € 1,515.60 £ 1,364.04 ¥ 174,007.72	November 2018	16	32	16 MiB 16,384 KiB 16,777,216 B 0.0156 GiB	22 MiB 22,528 KiB 23,068,672 B 0.0215 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	3.1 GHz 3,100 MHz 3,100,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz
i9-9980XE	$ 1,979.00 € 1,781.10 £ 1,602.99 ¥ 204,490.07	November 2018	18	36	18 MiB 18,432 KiB 18,874,368 B 0.0176 GiB	24.75 MiB 25,344 KiB 25,952,256 B 0.0242 GiB	165 W 165,000 mW 0.221 hp 0.165 kW	3 GHz 3,000 MHz 3,000,000 kHz	4.4 GHz 4,400 MHz 4,400,000 kHz	4.5 GHz 4,500 MHz 4,500,000 kHz
i9-9990XE		3 January 2019	14	28	14 MiB 14,336 KiB 14,680,064 B 0.0137 GiB	19.25 MiB 19,712 KiB 20,185,088 B 0.0188 GiB	255 W 255,000 mW 0.342 hp 0.255 kW	4 GHz 4,000 MHz 4,000,000 kHz	5 GHz 5,000 MHz 5,000,000 kHz
Count: 8

See also

• AMD Ryzen 7
• Intel Core i7EE