CPU Comparison

Intel Core i7-6900K vs Intel Core i7-6800K

A side-by-side comparison of specs, performance and value. The Intel Core i7-6900K is a formidable high-end desktop processor built on the Broadwell-E architecture, designed for extreme enthusiasts and professional content creators. Featuring eight cores and sixteen threads, it delivers massive multi-threaded processing power for the most demanding workloads. It operates at a base clock of 3.2 GHz and utilizes Intel Turbo Boost Max 3.0 to dynamically push frequencies up to 4.0 GHz on the fastest core, balancing raw parallel performance with responsive single-threaded speed. The processor leverages the LGA 2011-v3 socket, supporting quad-channel DDR4 memory for unparalleled memory bandwidth. With a full 40 PCIe 3.0 lanes, it supports expansive multi-GPU configurations and high-speed NVMe RAID arrays without bandwidth bottlenecks. Its 20 MB of L3 cache ensures efficient data handling across all eight cores. The 140-watt TDP requires robust cooling, but the payoff is exceptional performance in 3D rendering, complex video editing, and heavy virtualization scenarios, making it a true workstation powerhouse.

Top pick
Intel · Core i7
Intel Core i7-6900K
8C / 16T4 GHz140 W
8.5
Full review
Intel · Core i7
Intel Core i7-6800K
6C / 12T3.6 GHz140 W
8
Full review

The Bottom Line

Overview & Launch

Brand
Intel
Intel
Market
Desktop
High-End Desktop
Segment
High-End Desktop
Generation
Core i7 (Broadwell-E)
6th Gen HEDT (Broadwell-E)
Launched
2016
2016
Status
End-of-life
Discontinued
Codename
Broadwell-E
Broadwell-E
Series
Core i7
Core i7
Family
6th Generation
Broadwell-E (Core i7)
Predecessor
Intel Core i7-5960X
Intel Core i7-5820K
Successor
Intel Core i9-7820X
Intel Core i7-7820X

Specifications Compared

Cores & Clocks
Cores
8
6
Threads
16
12
Base Clock
3.2 GHz
3.4 GHz
Boost Clock
4 GHz
3.6 GHz
Cache & Power
L3 Cache
20 MB
15 MB
TDP
140 W
140 W
Architecture
Architecture
Broadwell-E
Broadwell-E
Process Node
14nm
14 nm
Memory
Memory Type
DDR4
DDR4
Memory Speed
2400 MT/s
DDR4-2400/2133
Memory Channels
Quad (4)
Quad (4)
Max Memory
128 GB
128 GB
Platform & I/O
Socket
Intel Socket 2011-3
LGA2011-v3
PCIe Version
Gen 3
3.0
PCIe Lanes
40
28
Integrated GPU
None
None
Unlocked
Yes
Yes

Performance Compared

Productivity

Intel Core i7-6900K85

8 cores handle heavy rendering excellently, but lack modern IPC.

Intel Core i7-6800K85

Six cores and 12 threads provide solid throughput in multi-threaded creator applications.

Gaming

Intel Core i7-6900K68

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

Intel Core i7-6800KBest78

Plays modern games well when paired with a strong GPU, though frame rates lag behind newer high-frequency CPUs.

Virtualization

Intel Core i7-6900KBest90

40 PCIe lanes and 16 threads make it perfect for VMs.

Intel Core i7-6800K86

Quad-channel memory and PCIe lanes suit lab environments with multiple VMs and storage.

Efficiency

Intel Core i7-6900K40

140W TDP is power-hungry by modern standards.

Intel Core i7-6800KBest60

140 W TDP and 14 nm place it behind newer platforms in performance per watt.

Specialized Performance

AI / ML

Intel Core i7-6900KLimited
  • No AI hardware
  • CPU inference is good due to core count
Intel Core i7-6800KBasic
  • No dedicated NPUs or matrix accelerators
  • Suitable for CPU-bound inference workloads only
  • AVX2 support helps in some compute-heavy tasks

Content Creation

Intel Core i7-6900KExcellent
Premiere ProBlenderAutoCADDaVinci Resolve
Intel Core i7-6800KVery Good
Adobe Premiere ProDaVinci ResolveBlenderCinema 4DAfter Effects7-Zip / HandBrake

Gaming

Intel Core i7-6900KGood
  • Can handle modern games with a discrete GPU
  • Lower single-core speed limits high-refresh gaming
  • Great for multi-tasking while gaming
Intel Core i7-6800KGood
  • Handles high-refresh gaming with a capable GPU
  • Turbo Boost Max 3.0 can aid lightly threaded titles
  • Modern CPUs typically deliver higher gaming efficiency

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
Virtual Machines
Excellent
Very Good
Streaming
Excellent
High-Refresh Gaming
Good
Software Development
Good
Gaming
Good

Target Audience

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

Strengths & Weaknesses

Intel Core i7-6900K

Pros

  • 8 cores / 16 threads
  • Full 40 PCIe lanes
  • Quad-channel memory
  • 20 MB L3 cache

Cons

  • High 140W TDP
  • Older 14nm process
  • Lacks integrated graphics
  • Expensive on the used market
Intel Core i7-6800K

Pros

  • Six cores and 12 threads remain viable for productivity
  • Quad-channel DDR4 provides strong memory bandwidth
  • 28 PCIe 3.0 lanes enable multi-GPU and NVMe flexibility
  • Unlocked multiplier for overclocking enthusiasts
  • Turbo Boost Max 3.0 improves lightly threaded performance

Cons

  • 140 W TDP is high by modern standards
  • No integrated graphics requires a discrete GPU
  • X99 platform is legacy with limited future CPU options
  • PCIe lane count lower than 40-lane Broadwell-E SKUs
  • Launch price higher than newer, more efficient options

Competitors & Alternatives

Intel Core i7-6900K

Intel Core i7-6800K

Our Verdict on Each

An incredible 8-core HEDT processor for its time, offering massive multi-threaded power, though modern mainstream CPUs now match or exceed it.

Best for: Upgrading an X99 system for maximum multi-core rendering.

Read the full review

A capable entry point into X99 HEDT with solid multi-threading and PCIe headroom, now best suited to budget used builds or specialized workloads rather than new gaming rigs.

Best for: Budget-conscious used HEDT build for multi-threaded workloads

Read the full review

Frequently Asked Questions

Which is better, Intel Core i7-6900K or Intel Core i7-6800K?

Based on our editorial ratings, the Intel Core i7-6900K comes out ahead with a score of 8.5/10. 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 i7-6900K or Intel Core i7-6800K?

For gaming, the Intel Core i7-6800K leads with a gaming performance score of 78/100 among Intel Core i7-6900K and Intel Core i7-6800K.

Do Intel Core i7-6900K and Intel Core i7-6800K use the same socket?

No. They use different sockets (Intel Core i7-6900K: Intel Socket 2011-3, Intel Core i7-6800K: LGA2011-v3), so each needs a compatible motherboard.

Which has more cores?

The Intel Core i7-6900K has the most cores. Core counts: Intel Core i7-6900K (8 cores), Intel Core i7-6800K (6 cores).

Which is faster in multi-core benchmarks?

The Intel Core i7-6900K posts the highest multi-core benchmark score. Multi-core results: Intel Core i7-6900K (17,000). Benchmark figures are approximate and workload-dependent.