CPU Comparison

Intel Core i7-6850K vs Intel Core i7-7820X

A side-by-side comparison of specs, performance and value. The Intel Core i7-6850K is a high-end desktop processor that occupies the middle tier of the Broadwell-E lineup. Engineered for demanding enthusiasts and professional creators, it features six cores and twelve threads, providing substantial parallel processing power. It operates at a base clock of 3.6 GHz and can boost up to 4.0 GHz using Intel Turbo Boost Max 3.0, ensuring snappy single-threaded performance when needed. Unlike the entry-level 6800K, the 6850K offers a full 40 PCIe 3.0 lanes, unlocking maximum expansion potential for quad-GPU setups or massive NVMe storage arrays. It utilizes the LGA 2011-v3 socket and supports quad-channel DDR4 memory, delivering up to 76.8 GB/s of bandwidth. With a 140-watt TDP, it is a power-hungry chip designed for robust cooling. Lacking integrated graphics, it targets users who rely on discrete GPUs, excelling in complex 3D rendering, heavy video editing, and intensive virtualization environments where PCIe lanes and memory bandwidth are critical bottlenecks.

Top pick
Intel · Core i7
Intel Core i7-6850K
6C / 12T4 GHz140 W
8.2
Full review
Intel · Core i7
Intel Core i7-7820X
8C / 16T4.5 GHz140 W
7.5
Full review

The Bottom Line

Overview & Launch

Brand
Intel
Intel
Market
Desktop
High-End Desktop (HEDT)
Segment
High-End Desktop
Generation
Core i7 (Broadwell-E)
7th Gen X-Series (Skylake-X)
Launched
2016
2017
Status
End-of-life
Discontinued
Codename
Broadwell-E
Skylake-X
Series
Core i7
Core i7
Family
6th Generation
X-Series 7th Gen (Core i7)
Predecessor
Intel Core i7-5930K
Intel Core i7-6900K
Successor
Intel Core i7-7820X
Platform discontinued; refreshed X299 and later Core X-series succeeded this lineup

Specifications Compared

Cores & Clocks
Cores
6
8
Threads
12
16
Base Clock
3.6 GHz
3.6 GHz
Boost Clock
4 GHz
4.5 GHz
Cache & Power
L3 Cache
15 MB
11 MB
TDP
140 W
140 W
Architecture
Architecture
Broadwell-E
Skylake-X
Process Node
14nm
14 nm
Memory
Memory Type
DDR4
DDR4
Memory Speed
2400 MT/s
DDR4-2666
Memory Channels
Quad (4)
Quad (4)
Max Memory
128 GB
128 GB
Platform & I/O
Socket
Intel Socket 2011-3
LGA2066
PCIe Version
Gen 3
3.0
PCIe Lanes
40
28
Integrated GPU
None
None
Unlocked
Yes
Yes

Performance Compared

Productivity

Intel Core i7-6850K78

6 cores handle heavy rendering well, but lack modern IPC.

Intel Core i7-7820XBest88

Strong multi-threaded throughput in CINEBENCH, HandBrake, and similar workloads at launch; still competent for many content creation tasks compared to modern mainstream parts.

Gaming

Intel Core i7-6850K68

Good for 60fps gaming, but single-core speed limits high-refresh performance.

Intel Core i7-7820XBest78

Delivers high frame rates in 2017-era titles and remains adequate for modern gaming, but newer gaming-focused CPUs with higher clocks and improved IPC pull ahead.

Virtualization

Intel Core i7-6850K85

40 PCIe lanes and 12 threads make it excellent for VMs.

Intel Core i7-7820X85

PCIe and memory bandwidth are helpful for multiple VMs, but core count is moderate for modern heavy virtualization needs.

Efficiency

Intel Core i7-6850K40

140W TDP is power-hungry by modern standards.

Intel Core i7-7820XBest60

High 140 W TDP and 14 nm process lead to greater power consumption versus newer 7 nm and smaller nodes.

Specialized Performance

AI / ML

Intel Core i7-6850KLimited
  • No AI hardware
  • CPU inference is moderate due to core count
Intel Core i7-7820XLimited
  • No dedicated AI acceleration hardware
  • AVX-512 can help certain CPU-bound inference tasks
  • Most modern AI workloads are better served by GPUs

Content Creation

Intel Core i7-6850KExcellent
Premiere ProBlenderAutoCADDaVinci Resolve
Intel Core i7-7820XVery Good
Adobe Premiere ProDaVinci ResolveBlenderCinema 4DAfter Effects

Gaming

Intel Core i7-6850KGood
  • Can handle modern games with a discrete GPU
  • Lower single-core speed limits high-refresh gaming
  • Great for multi-tasking while gaming
Intel Core i7-7820XGood
  • Capable of high-refresh gaming with a strong GPU
  • Single-core boost reaches up to 4.5 GHz on favored cores
  • Modern CPUs offer better gaming efficiency and higher IPC

Industry Impact

Gaming
Moderate
Moderate
Workstations
High
High
Content Creation
High
High
Virtualization
High
High

Best CPU by Use Case

4K Video Editing
Excellent
Very Good
3D Rendering
Excellent
Very Good
Multi-GPU Compute
Excellent
Virtual Machines
Excellent
High-Refresh Gaming
Fair
Software Compilation
Very Good
Virtualization
Good
Gaming
Good

Target Audience

Gamers
Targeted
Targeted
Content Creators
Targeted
Targeted
Developers
Targeted
Targeted
Workstation Users
Targeted
Targeted
Streamers
Targeted
Targeted
Office / Productivity
Students

Strengths & Weaknesses

Intel Core i7-6850K

Pros

  • 6 cores / 12 threads
  • Full 40 PCIe lanes
  • Quad-channel memory
  • Unlocked for overclocking

Cons

  • High 140W TDP
  • Older 14nm process
  • Lacks integrated graphics
  • Expensive on the used market
Intel Core i7-7820X

Pros

  • 8 cores and 16 threads for multi-threaded workloads
  • Quad-channel DDR4 memory increases bandwidth
  • 28 PCIe 3.0 lanes plus chipset lanes for expansion
  • Turbo Boost Max 3.0 for higher single-core boosts
  • AVX-512 support for optimized workloads
  • Unlocked multiplier for overclocking

Cons

  • High 140 W TDP and power consumption
  • No integrated graphics
  • Only 28 CPU PCIe lanes, limiting multi-GPU configurations
  • Discontinued platform with limited future upgrades
  • Older 14 nm process versus modern smaller nodes

Competitors & Alternatives

Intel Core i7-6850K

Intel Core i7-7820X

  • AMD Ryzen 7 1800X

    Creator/Gaming

    Rival
  • AMD Ryzen 7 1700X

    Creator/Gaming

    Rival
  • AMD Ryzen Threadripper 1920X

    Workstation

    Rival
  • AMD Ryzen Threadripper 1950X

    Workstation

    Rival
  • Compare head-to-head
  • More cores, higher efficiency, and DDR5 on a modern mainstream platform.

    Compare head-to-head
  • AMD Ryzen 9 7900
    Alt

    Strong multi-threaded performance with excellent efficiency.

  • AMD Ryzen 9 5900X
    Alt

    12-core AM4 option with strong gaming and creator performance.

  • High-performance mainstream platform with good upgrade path.

    Compare head-to-head
  • AMD Ryzen Threadripper 2950X (used)
    Alt

    Higher core and lane count for workstation-class workloads.

Our Verdict on Each

An excellent HEDT chip for its time, offering 40 PCIe lanes and strong multi-core performance, though outclassed by modern hardware.

Best for: Upgrading an X99 system for maximum PCIe expansion.

Read the full review

A competent eight-core HEDT chip with strong multi-threaded performance and platform expansion, though high power draw and limited PCIe lanes compared to higher-tier X299 CPUs make it a niche choice today.

Best for: Used-market upgrade for an existing X299 build with quad-channel DDR4 and a need for more cores than mainstream.

Read the full review

Frequently Asked Questions

Which is better, Intel Core i7-6850K or Intel Core i7-7820X?

Based on our editorial ratings, the Intel Core i7-6850K comes out ahead with a score of 8.2/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.

Which is faster for gaming, Intel Core i7-6850K or Intel Core i7-7820X?

For gaming, the Intel Core i7-7820X leads with a gaming performance score of 78/100 among Intel Core i7-6850K and Intel Core i7-7820X.

Do Intel Core i7-6850K and Intel Core i7-7820X use the same socket?

No. They use different sockets (Intel Core i7-6850K: Intel Socket 2011-3, Intel Core i7-7820X: LGA2066), so each needs a compatible motherboard.

Which has more cores?

The Intel Core i7-7820X has the most cores. Core counts: Intel Core i7-6850K (6 cores), Intel Core i7-7820X (8 cores).

Which is faster in multi-core benchmarks?

The Intel Core i7-6850K posts the highest multi-core benchmark score. Multi-core results: Intel Core i7-6850K (13,500). Benchmark figures are approximate and workload-dependent.