Quick Verdict
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.
Overview
Launch
2016
Status
DiscontinuedGeneration
6th Gen HEDT (Broadwell-E)
Market
High-End Desktop
The Intel Core i7-6800K is a six-core, 12-thread HEDT processor on the X99 platform, offering quad-channel DDR4, 28 PCIe 3.0 lanes, and Turbo Boost Max 3.0 for creators and enthusiasts who need more I/O than mainstream desktops.
The Core i7-6800K targets enthusiasts and creators needing more memory bandwidth and I/O than typical desktop CPUs. It pairs an unlocked six-core, 12-thread design with up to 3.8 GHz Turbo Boost Max, 28 PCIe 3.
0 lanes, and support for up to 128 GB of DDR4-2400 across four channels.
Specifications
Performance
Six cores and 12 threads provide solid throughput in multi-threaded creator applications.
Quad-channel memory and PCIe lanes suit lab environments with multiple VMs and storage.
Plays modern games well when paired with a strong GPU, though frame rates lag behind newer high-frequency CPUs.
140 W TDP and 14 nm place it behind newer platforms in performance per watt.
- •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
- •No dedicated NPUs or matrix accelerators
- •Suitable for CPU-bound inference workloads only
- •AVX2 support helps in some compute-heavy tasks
Architecture
14 nm
Process Node
Broadwell-E
Codename
6C / 12T
Core Config
15 MB
L3 Cache
140 W
TDP
Architecture Overview
Broadwell-E adapts the server-focused Broadwell-EP die to the high-end desktop, bringing architectural improvements over Haswell-E while retaining the X99 infrastructure.
CPU Design
Six physical cores with SMT (Hyper-Threading) for 12 threads; 15 MB shared L3 cache.
Memory Subsystem
Quad-channel DDR4 memory controller with official support up to DDR4-2400 and up to 128 GB capacity.
PCIe & I/O
28 PCIe 3.0 lanes directly from the CPU; additional lanes available from the X99 PCH for more devices.
Overclocking
Fully unlocked multiplier with base/boost and Turbo Boost Max 3.0 for tuning.
- 14nm process with modest IPC gains over Haswell-E
- Turbo Boost Max Technology 3.0
- Higher official memory speed support (DDR4-2400 vs 2133)
- Improved power management relative to 22nm predecessor
Key Highlights
- 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
- 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
History
Intel refreshed its high-end desktop platform in mid-2016 with Broadwell-E, bringing the 14 nm process and architectural refinements to X99 after the earlier Haswell-E generation. The i7-6800K arrived as the entry-level six-core model, priced lower than its 6850K sibling but with fewer PCIe lanes—28 versus 40—creating a clear segmentation for enthusiasts who did not need multi-GPU at full x16 speeds. Broadwell-E also introduced Turbo Boost Max Technology 3.
0, which identified the best core and pushed it higher. Over time, the platform faced strong competition from AMD’s Ryzen lineup, leading Intel to shift HEDT toward the new X299 platform with Skylake-X and subsequent generations. Broadwell-E production was eventually wound down, with Intel issuing a Product Change Notification in 2018 marking the end of orders and shipments.
Improvements over Previous Generation
- 14nm process with modest IPC gains over Haswell-E
- Turbo Boost Max Technology 3.0
- Higher official memory speed support (DDR4-2400 vs 2133)
- Improved power management relative to 22nm predecessor
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
Budget-conscious used HEDT build for multi-threaded workloads
Avoid if…
- Building a new gaming-focused PC from scratch
- Power efficiency and low heat output are priorities
- You require DDR5 or a modern upgrade path
Use Cases
Interesting Facts
Broadwell-E launched at Computex 2016 with availability set for May 30, aimed squarely at high-end desktop enthusiasts.
Intel marketed the 6800K as the most affordable way into the Broadwell-E family at $434 launch price.
Unlike pricier siblings, the 6800K is configured with 28 PCIe lanes instead of 40, segmenting the X99 stack.
Turbo Boost Max 3.0 identifies and boosts the best core to up to 3.8 GHz for single-threaded spikes.
The boxed 6800K ships without a stock cooler, assuming high-end air or liquid cooling.
People Also Ask
Is the Core i7-6800K still good for gaming in 2026?
It remains playable with a strong GPU, but modern chips offer higher frame rates and better efficiency.
How many PCIe lanes does the i7-6800K have?
It provides 28 PCIe 3.0 lanes from the CPU; additional lanes come from the X99 chipset.
Does the i7-6800K support DDR5 memory?
No, it supports DDR4 memory with quad-channel configuration.
Can the i7-6800K be overclocked?
Yes, the multiplier is unlocked for overclocking, though adequate cooling is required.
What is the Turbo Boost Max 3.0 frequency on the 6800K?
Turbo Boost Max 3.0 can push the best core to 3.8 GHz.
Is the i7-6800K compatible with X99 motherboards?
Yes, it is designed for LGA2011-v3 (X99) motherboards, often requiring a BIOS update for older boards.
Does the 6800K have integrated graphics?
No, it lacks an iGPU and requires a discrete graphics card.
What is the maximum memory capacity of the i7-6800K?
Intel lists up to 128 GB of DDR4 memory depending on the DIMMs used.
What is the TDP of the i7-6800K?
The processor is rated at 140 W TDP.
Is the i7-6800K a good choice for streaming?
It is capable for streaming when paired with a modern GPU, but newer CPUs offer better efficiency and dedicated encoders.
Frequently Asked Questions
What socket does the i7-6800K use?
It uses the LGA2011-v3 socket on X99 motherboards.
What is the base clock of the i7-6800K?
The processor base frequency is 3.40 GHz.
What is the maximum turbo frequency of the i7-6800K?
The maximum turbo frequency is 3.60 GHz; Turbo Boost Max 3.0 can reach 3.8 GHz.
How much L3 cache does the i7-6800K have?
It features 15 MB of Intel Smart Cache.
Does the i7-6800K support ECC memory?
Intel lists ECC Memory Supported as 'No' for this SKU.
What is the lithography of the i7-6800K?
It is built on a 14 nm process.
What PCIe version does the i7-6800K support?
It supports PCI Express 3.0.
Does the boxed i7-6800K include a cooler?
Intel indicates the boxed product does not include a fan or heatsink.
Is the i7-6800K discontinued?
Yes, Intel ARK lists marketing status as Discontinued.
When was the i7-6800K launched?
Intel ARK shows Q2'16; contemporaneous reporting points to availability on May 30, 2016.