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CPU Comparison

Intel Core i7-6950X vs Intel Core i7-7820X X-series

A side-by-side comparison of specs, performance and value. The Intel Core i7-6950X Extreme Edition is a 10-core, 20-thread high-end desktop processor built on the 14 nm Broadwell-E architecture, featuring quad-channel DDR4 memory, 40 PCIe 3.0 lanes, and an unlocked multiplier for enthusiasts.

Intel · Core X-Series
Intel Core i7-6950X
10C / 20T3.5 GHz140 W
7.5
Full review
Intel · Core X-Series
Intel Core i7-7820X X-series
8C / 16T4.5 GHz140 W
7.5
Full review

The Bottom Line

Best for multi-core

Intel Core i7-7820X X-series

88
Score

Best for gaming

Intel Core i7-7820X X-series

78
Score

Overview & Launch

Attribute
Intel Core i7-6950XIntel
Intel Core i7-7820X X-seriesIntel
Brand
Intel
Intel
Market
High-End Desktop (HEDT)
High-End Desktop (HEDT)
Generation
6th Generation Core X-Series (Broadwell-E)
7th Gen X-Series (Skylake-X)
Launched
2016
2017
Status
Discontinued
Discontinued
Codename
Broadwell-E
Skylake-X
Series
Core X-Series
Core X-Series
Family
Broadwell-E
Skylake-X (X299 HEDT)
Predecessor
Intel Core i7-5960X
Intel Core i7-6900K
Successor
Intel Core i9-7900X (Skylake-X)
Platform discontinued; refreshed X299 and later Core X-series succeeded this lineup

Specifications Compared

Specification
Intel Core i7-6950XIntel
Intel Core i7-7820X X-seriesIntel
Cores & Clocks
Cores
10
8
Threads
20
16
Base Clock
3 GHz
3.6 GHz
Boost Clock
3.5 GHz
4.5 GHz
Cache & Power
L3 Cache
25 MB
11 MB
TDP
140 W
140 W
Architecture
Architecture
Broadwell-E
Skylake-X
Process Node
14 nm
14 nm
Memory
Memory Type
DDR4
DDR4
Memory Speed
DDR4-2400/2133
DDR4-2666
Memory Channels
Quad (4)
Quad (4)
Max Memory
128 GB
128 GB
Platform & I/O
Socket
LGA2011-v3
LGA2066
PCIe Version
3.0
3.0
PCIe Lanes
40
28
Integrated GPU
None
None
Unlocked
Yes
Yes

Performance Compared

Productivity

Intel Core i7-6950X82
Intel Core i7-7820X X-seriesBest88

Gaming

Intel Core i7-6950X70
Intel Core i7-7820X X-seriesBest78

Virtualization

Intel Core i7-6950X85
Intel Core i7-7820X X-series85

Efficiency

Intel Core i7-6950X55
Intel Core i7-7820X X-seriesBest60

Specialized Performance

AI / ML

Intel Core i7-6950XLimited
  • Lacks dedicated AI accelerators; AI workloads rely on CPU and any discrete GPU.
Intel Core i7-7820X X-seriesLimited
  • 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 i7-6950XVery Good
Adobe Premiere ProDaVinci ResolveBlenderCinema 4DAfter Effects
Intel Core i7-7820X X-seriesVery Good
Adobe Premiere ProDaVinci ResolveBlenderCinema 4DAfter Effects

Gaming

Intel Core i7-6950XGood
  • Adequate for high-refresh gaming with a strong GPU in many titles
  • Gains more from GPU upgrades than CPU upgrades in typical game workloads
  • Newer gaming-focused CPUs offer better frame pacing and lower latency
Intel Core i7-7820X X-seriesGood
  • 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

Sector
Intel Core i7-6950XIntel
Intel Core i7-7820X X-seriesIntel
Gaming
Low
Moderate
Workstations
High
High
Content Creation
High
High
Virtualization
High
High

Best CPU by Use Case

Use Case
Intel Core i7-6950XIntel
Intel Core i7-7820X X-seriesIntel
4K Video Editing
Very Good
Very Good
3D Rendering
Very Good
Very Good
Software Compilation
Very Good
Very Good
Virtual Machines
Excellent
—
Gaming
Good
Good
Virtualization
—
Good

Target Audience

Audience
Intel Core i7-6950XIntel
Intel Core i7-7820X X-seriesIntel
Gamers
—
Targeted
Content Creators
Targeted
Targeted
Developers
Targeted
Targeted
Workstation Users
Targeted
Targeted
Streamers
Targeted
Targeted
Office / Productivity
—
—
Students
—
—

Strengths & Weaknesses

Intel Core i7-6950X

Pros

  • 10 cores and 20 threads
  • 40 PCIe 3.0 lanes for flexible expansion
  • Quad-channel DDR4 memory support
  • Fully unlocked multiplier for overclocking
  • Turbo Boost Max 3.0 for improved single-thread performance
  • Strong virtualization support (VT-x, VT-d)
  • Mature X99 platform with many motherboard options

Cons

  • High launch price and poor value versus newer options
  • No integrated graphics (requires discrete GPU)
  • High power consumption at 140W TDP
  • Older platform with no upgrade path beyond Broadwell-E
  • Discontinued with limited availability and no warranty
Intel Core i7-7820X X-series

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 i7-6950X

  • AMD Ryzen Threadripper 1950X

    Workstation

    Rival
  • AMD Ryzen 9 3950X

    Creator

    Rival
  • Intel Core i9-7900X

    HEDT

    Rival
  • Intel Core i9-9820X

    HEDT

    Rival
    Compare head-to-head
  • AMD Ryzen Threadripper 2950X

    Workstation

    Rival
  • Intel Core i7-14700K
    Alt

    Much higher performance and efficiency on a modern platform.

  • AMD Ryzen 9 7950X
    Alt

    More cores, far better efficiency, and DDR5 support.

  • AMD Ryzen 9 5900X
    Alt

    Strong multi-threaded performance and lower power than older HEDT options.

  • Intel Core i7-13700K
    Alt

    Balanced performance for mixed gaming and productivity workloads.

  • Intel Core i9-10900K
    Alt

    Mainstream platform with good core count and no HEDT complexity.

    Compare head-to-head

Intel Core i7-7820X X-series

  • 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
  • Intel Core i9-7900X

    HEDT

    Rival
  • Intel Core i7-14700K
    Alt

    More cores, higher efficiency, and DDR5 on a modern mainstream platform.

  • 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.

  • Intel Core i7-13700K
    Alt

    High-performance mainstream platform with good upgrade path.

  • AMD Ryzen Threadripper 2950X (used)
    Alt

    Higher core and lane count for workstation-class workloads.

Our Verdict on Each

Intel Core i7-6950XSituational

A multi-threaded powerhouse for its time, the i7-6950X brought 10 cores to desktop HEDT but commanded a steep price and has since been eclipsed in performance and efficiency by newer platforms.

Best for: Used-market X99 upgrade for creators on a tight budget

Read the full review
Intel Core i7-7820X X-seriesRecommended

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 faster for gaming, Intel Core i7-6950X or Intel Core i7-7820X X-series?

For gaming, the Intel Core i7-7820X X-series leads with a gaming performance score of 78/100 among Intel Core i7-6950X and Intel Core i7-7820X X-series.

Do Intel Core i7-6950X and Intel Core i7-7820X X-series use the same socket?

No. They use different sockets (Intel Core i7-6950X: LGA2011-v3, Intel Core i7-7820X X-series: LGA2066), so each needs a compatible motherboard.

Which has more cores?

The Intel Core i7-6950X has the most cores. Core counts: Intel Core i7-6950X (10 cores), Intel Core i7-7820X X-series (8 cores).