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Core i7-7820X
General Info
Designer	Intel
Manufacturer	Intel
Model Number	i7-7820X
Part Number	BX80673I77820X, BXC80673I77820X, CD8067303611000
S-Spec	SR3L5
Market	Desktop
Introduction	May 30, 2017 (announced) June 26, 2017 (launched)
Release Price	$599
Shop	Amazon
General Specs
Family	Core i7
Series	i7-7000
Locked	No
Frequency	3,600 MHz
Turbo Frequency	Yes
Turbo Frequency	4,300 MHz (1 core), 4,300 MHz (2 cores)
Bus type	DMI 3.0
Bus rate	4 × 8 GT/s
Clock multiplier	36
Microarchitecture
ISA	x86-64 (x86)
Microarchitecture	Skylake (server)
Platform	Skylake
Chipset	Lewisburg
Core Name	Skylake X
Core Family	6
Core Model	85
Core Stepping	U0
Process	14 nm
Technology	CMOS
Word Size	64 bit
Cores	8
Threads	16
Max Memory	128 GiB
Multiprocessing
Max SMP	1-Way (Uniprocessor)
Electrical
TDP	140 W
Tjunction	0 °C – 99 °C
Tstorage	-25 °C – 125 °C
Packaging
Package	FCLGA-2066 (LGA)
Dimension	52.5 mm × 45 mm
Pitch	1.016 mm
Contacts	2066
Socket	Socket R4

Core i7-7820X is a 64-bit octa-core high-performance x86 desktop microprocessor introduced by Intel in mid-2017. This chip, which is based on the Skylake microarchitecture, is fabricated on Intel's enhanced 14nm+ process. The i7-7820X operates at 3.6 GHz with a TDP of 140 W and a Turbo Boost frequency of 4.3 GHz. The processor supports up to 128 GiB of quad-channel DDR4-2666 memory.

In addition to its Turbo Boost frequency, the i7-7820X has a Turbo Max frequency of 4.5 GHz.

Cache

Main article: Skylake § Cache

[Edit/Modify Cache Info]

Cache Organization Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory. The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC. Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies. Note: All units are in kibibytes and mebibytes.

L1$ 512 KiB 524,288 B 0.5 MiB L1I$ 256 KiB 262,144 B 0.25 MiB 8x32 KiB 8-way set associative   L1D$ 256 KiB 262,144 B 0.25 MiB 8x32 KiB 8-way set associative write-back L2$ 8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB     8x1 MiB 16-way set associative write-back L3$ 11 MiB 11,264 KiB 11,534,336 B 0.0107 GiB     8x1.375 MiB 11-way set associative write-back

Memory controller

[Edit/Modify Memory Info]

	Integrated Memory Controller
	Max Type DDR4-2666 Supports ECC No Channels 4 Max Bandwidth 79.47 GiB/s 81,377.28 MiB/s 85.33 GB/s 85,330.263 MB/s 0.0776 TiB/s 0.0853 TB/s Bandwidth Single 19.89 GiB/s Double 39.72 GiB/s Quad 79.47 GiB/s

Expansions

[Edit/Modify Expansions Info]

	Expansion Options
PCIe Revision: 3.0 Max Lanes: 28 Configuration: 1x16+1x8+1x4, 3x8+1x4

Graphics

This processor has no integrated graphics.

Features

[Edit/Modify Supported Features]

Supported x86 Extensions & Processor Features

MMX MMX Extension EMMX Extended MMX Extension SSE Streaming SIMD Extensions SSE2 Streaming SIMD Extensions 2 SSE3 Streaming SIMD Extensions 3 SSSE3 Supplemental SSE3 SSE4.1 Streaming SIMD Extensions 4.1 SSE4.2 Streaming SIMD Extensions 4.2 AVX Advanced Vector Extensions AVX2 Advanced Vector Extensions 2 AVX-512 Advanced Vector 512-bit (2 Units) AVX512F AVX-512 Foundation AVX512CD AVX-512 Conflict Detection AVX512BW AVX-512 Byte and Word AVX512DQ AVX-512 Doubleword and Quadword Instructions AVX512VL AVX-512 Vector Length ABM Advanced Bit Manipulation BMI1 Bit Manipulation Instruction Set 1 BMI2 Bit Manipulation Instruction Set 2 FMA3 3-Operand Fused-Multiply-Add AES AES Encryption Instructions RdRand Hardware RNG ADX Multi-Precision Add-Carry CLMUL Carry-less Multiplication Extension F16C 16-bit Floating Point Conversion x86-16 16-bit x86 x86-32 32-bit x86 x86-64 64-bit x86 Real Real Mode Protected Protected Mode SMM System Management Mode FPU Integrated x87 FPU NX No-eXecute HT Hyper-Threading TBT 2.0 Turbo Boost Technology 2.0 TBMT 3.0 Turbo Boost Max Technology 3.0 EIST Enhanced SpeedStep Technology VT-x VT-x (Virtualization) VT-d VT-d (I/O MMU virtualization) EPT Extended Page Tables (SLAT) TSX Transactional Synchronization Extensions

Frequencies

See also: Intel's CPU Frequency Behavior

[Modify Frequency Info]

Mode	Base	Turbo Frequency/Active Cores
		1	2	3	4	5	6	7	8
Normal	3,600 MHz	4,300 MHz	4,300 MHz	4,100 MHz	4,100 MHz	4,000 MHz	4,000 MHz	4,000 MHz	4,000 MHz

Overclocking

The 7820x CPU overclocks to 4.6ghz on all cores relatively easily and 4.8ghz on all cores is also pretty common overclock. 4.9 and 5.0ghz can be tricky but are not uncommon and only obtainable if sufficient cooling is achieved. Generally, 4.5Ghz is a common overclock on quality air coolers and beyond that water-cooling is needed for sustained higher overclocks.

Stock out of the box using Intel® Turbo Boost Max Technology 3.0 Frequency the CPU will overclock 2 cores to 4.5ghz.

The quad memory controller of the Skylake-X CPUs have advanced overclocking ability such as in the case of Corsair Dominator Platinum 3600mhz memory will easily overclock to 3,800mhz - 4,000mhz. At 3,800mhz total memory bandwidth is around 101GB/s Read and 107GB/s Write with Copy at 97.2GB/s.