CPU Comparison

Intel Core i7-6850K vs Intel Core i7-7800X

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 i7-7800X
6C / 12T4 GHz140 W
7
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 Core X-Series
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 i7-6850K
Successor
Intel Core i7-7820X
Intel Core i7-9800X

Specifications Compared

Cores & Clocks
Cores
6
6
Threads
12
12
Base Clock
3.6 GHz
3.5 GHz
Boost Clock
4 GHz
4 GHz
Cache & Power
L3 Cache
15 MB
8.25 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
DDR4-2400
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
PCIe 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 i7-7800XBest79

Handles multi-threaded productivity tasks reasonably well, though newer platforms overtake it in performance-per-watt.

Gaming

Intel Core i7-6850K68

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

Intel Core i7-7800XBest76

Adequate for 1080p and 1440p with a strong GPU, but modern gaming CPUs deliver higher frame rates and better efficiency.

Virtualization

Intel Core i7-6850KBest85

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

Intel Core i7-7800X83

Quad-channel memory and 12 threads suit multiple VMs and developer workloads.

Efficiency

Intel Core i7-6850K40

140W TDP is power-hungry by modern standards.

Intel Core i7-7800XBest60

High power draw relative to performance makes it less efficient than current-generation chips.

Specialized Performance

AI / ML

Intel Core i7-6850KLimited
  • No AI hardware
  • CPU inference is moderate due to core count
Intel Core i7-7800XLimited
  • AVX-512 accelerates some inference workloads on CPU
  • No dedicated NPU or matrix engines
  • Suitable only for light or experimental AI workloads

Content Creation

Intel Core i7-6850KExcellent
Premiere ProBlenderAutoCADDaVinci Resolve
Intel Core i7-7800XVery 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 i7-7800XGood
  • Supports high-refresh gaming with capable GPUs
  • Lacks the single-thread uplift of newer architectures
  • Requires discrete graphics

Industry Impact

Gaming
Moderate
Low
Workstations
High
Medium
Content Creation
High
Medium
Virtualization
High
Medium

Best CPU by Use Case

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

Target Audience

Gamers
Targeted
Targeted
Content Creators
Targeted
Targeted
Developers
Targeted
Targeted
Workstation Users
Targeted
Targeted
Streamers
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 i7-7800X

Pros

  • Quad-channel DDR4 memory
  • Unlocked for overclocking
  • AVX-512 support
  • 12 threads for multi-threaded workloads
  • 28 PCIe 3.0 lanes from CPU

Cons

  • No integrated graphics
  • Higher power consumption relative to modern CPUs
  • Only 28 PCIe lanes vs higher-tier X-series SKUs
  • Discontinued platform with limited upgrade path
  • Memory officially limited to DDR4-2400

Competitors & Alternatives

Intel Core i7-6850K

Intel Core i7-7800X

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

The i7-7800X offers quad-channel memory and decent multi-core performance for its era, but higher power draw and limited PCIe lanes make it a niche choice today versus modern mainstream platforms.

Best for: Budget upgrade on existing X299 platform with DDR4 investment

Read the full review

Frequently Asked Questions

Which is better, Intel Core i7-6850K or Intel Core i7-7800X?

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 i7-7800X?

For gaming, the Intel Core i7-7800X leads with a gaming performance score of 76/100 among Intel Core i7-6850K and Intel Core i7-7800X.

Do Intel Core i7-6850K and Intel Core i7-7800X use the same socket?

No. They use different sockets (Intel Core i7-6850K: Intel Socket 2011-3, Intel Core i7-7800X: LGA2066), so each needs a compatible motherboard.

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.