CPU Comparison

Intel Core i7-6850K vs Intel Core i7-990X

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.

Intel · Core i7
Intel Core i7-6850K
6C / 12T4 GHz140 W
8.2
Full review
Top pick
Intel · Core i7 Extreme Edition
Intel Core i7-990X
6C / 12T3.73 GHz130 W
8.8
Full review

The Bottom Line

Overview & Launch

Brand
Intel
Intel
Market
Desktop
Desktop
Segment
High-End Desktop
High-End Desktop
Generation
Core i7 (Broadwell-E)
1st Generation (Westmere)
Launched
2016
2011
Status
End-of-life
End-of-life
Codename
Broadwell-E
Gulftown
Series
Core i7
Core i7 Extreme Edition
Family
6th Generation
Gulftown
Predecessor
Intel Core i7-5930K
Core i7-980X Extreme Edition
Successor
Intel Core i7-7820X
Core i7-3960X Extreme Edition

Specifications Compared

Cores & Clocks
Cores
6
6
Threads
12
12
Base Clock
3.6 GHz
3.46 GHz
Boost Clock
4 GHz
3.73 GHz
Cache & Power
L3 Cache
15 MB
12 MB
TDP
140 W
130 W
Architecture
Architecture
Broadwell-E
Westmere (Gulftown)
Process Node
14nm
32nm
Memory
Memory Type
DDR4
DDR3
Memory Speed
2400 MT/s
DDR3-1066
Memory Channels
Quad (4)
Triple (3)
Max Memory
128 GB
24 GB
Platform & I/O
Socket
Intel Socket 2011-3
LGA 1366
PCIe Version
Gen 3
PCIe 2.0
PCIe Lanes
40
36
Integrated GPU
None
None
Unlocked
Yes
Yes

Performance Compared

Productivity

Intel Core i7-6850KBest78

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

Intel Core i7-990X38

Capable for basic legacy tasks, but severely outpaced by modern hardware.

Gaming

Intel Core i7-6850KBest68

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

Intel Core i7-990X42

Slightly better than the 980X due to clocks, but still bottlenecks modern games.

Virtualization

Intel Core i7-6850KBest85

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

Intel Core i7-990X52

12 threads are still somewhat useful for basic VM labs.

Efficiency

Intel Core i7-6850KBest40

140W TDP is power-hungry by modern standards.

Intel Core i7-990X15

130W TDP remains highly inefficient compared to modern nodes.

Specialized Performance

AI / ML

Intel Core i7-6850KLimited
  • No AI hardware
  • CPU inference is moderate due to core count
Intel Core i7-990XNone
  • No modern AI acceleration
  • Too slow for modern inference

Content Creation

Intel Core i7-6850KExcellent
Premiere ProBlenderAutoCADDaVinci Resolve
Intel Core i7-990XModerate (Legacy)
Legacy Adobe Suite3ds MaxMayaHandbrake

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 i7-990XPoor (Modern)
  • Low IPC
  • Lacks AVX2
  • Bottlenecks modern GPUs

Industry Impact

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

Best CPU by Use Case

4K Video Editing
Excellent
3D Rendering
Excellent
Multi-GPU Compute
Excellent
Virtual Machines
Excellent
High-Refresh Gaming
Fair
Retro Gaming
Good
Legacy 3D Rendering
Excellent
Video Transcoding
Excellent
Virtualization
Good
Modern Gaming
Poor

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 i7-990X

Pros

  • Highest clock speeds for LGA 1366
  • Unlocked multiplier
  • 6 cores and 12 threads
  • 12MB L3 cache
  • Excellent legacy multi-threaded performance

Cons

  • Very expensive on the used market
  • Obsolete platform
  • High power consumption
  • No integrated graphics
  • Lacks modern instruction sets like AVX2

Competitors & Alternatives

Intel Core i7-6850K

Intel Core i7-990X

  • Compare head-to-head
  • AMD FX-8150

    Desktop

    Rival
  • Intel Xeon X5690

    Workstation

    Rival
  • AMD Phenom II X6 1100T

    Desktop

    Rival
  • Intel Core i7-2600K

    Desktop

    Rival
  • Intel Xeon X5675
    Alt

    A much cheaper server equivalent that can be overclocked on X58.

  • Intel Core i5-12400F
    Alt

    A modern budget CPU that obliterates it in every metric.

  • AMD Ryzen 5 5600
    Alt

    A modern 6-core CPU with vastly superior efficiency and IPC.

  • Intel Core i7-3930K
    Alt

    The direct successor platform offering better upgrade paths.

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 fastest processor of its generation. A collector's dream today, but practically obsolete for modern workloads.

Best for: Keeping an existing X58 system alive as long as possible.

Read the full review

Frequently Asked Questions

Which is better, Intel Core i7-6850K or Intel Core i7-990X?

Based on our editorial ratings, the Intel Core i7-990X comes out ahead with a score of 8.8/10. 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 i7-990X?

For gaming, the Intel Core i7-6850K leads with a gaming performance score of 68/100 among Intel Core i7-6850K and Intel Core i7-990X.

Which uses less power?

The Intel Core i7-990X has the lowest rated TDP. Power draw across these chips: Intel Core i7-6850K (140 W), Intel Core i7-990X (130 W).

Do Intel Core i7-6850K and Intel Core i7-990X use the same socket?

No. They use different sockets (Intel Core i7-6850K: Intel Socket 2011-3, Intel Core i7-990X: LGA 1366), 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), Intel Core i7-990X (0). Benchmark figures are approximate and workload-dependent.