CPU Comparison
Intel Core i7-6800K vs Intel Core i7-6900K
A side-by-side comparison of specs, performance and value. The Intel Core i7-6800K is a high-end desktop (HEDT) processor built on the Broadwell-E architecture. Designed for enthusiasts and professionals, it features six cores and twelve threads, offering a significant multi-threaded performance leap over mainstream quad-core CPUs of its era. Operating at a base frequency of 3.4 GHz and boosting up to 3.8 GHz with Intel Turbo Boost Max 3.0, it delivers robust computing power for demanding applications. Unlike mainstream chips, it utilizes the LGA 2011-v3 socket and the X99 chipset, supporting quad-channel DDR4 memory for massive memory bandwidth. With 28 PCIe 3.0 lanes, it provides extensive expansion capabilities for multi-GPU setups and high-speed storage arrays. The 140-watt TDP reflects its workstation-class design. While it lacks integrated graphics, requiring a discrete GPU, the 6800K excels in parallel processing tasks like video editing, 3D rendering, and virtualization, making it a powerhouse for creators who need more than standard desktop platforms offer.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
6 cores handle rendering well, but lack the speed of modern architectures.
Handles multi-threaded creator workloads well, though modern CPUs with higher IPC and efficiency outpace it.
Gaming
Good for gaming, but single-core speed lags behind modern CPUs.
Capable for 1080p and 1440p gaming with a strong GPU, but newer mainstream CPUs offer higher frame rates and better responsiveness.
Virtualization
Quad-channel memory and 12 threads make it great for VMs.
Excellent for running multiple VMs thanks to 8 cores, 16 threads, and quad-channel memory.
Efficiency
140W TDP is power-hungry by modern standards.
High 140 W TDP results in higher power draw and heat versus newer generations.
Specialized Performance
AI / ML
- No AI hardware
- CPU inference is moderate due to core count
- No dedicated AI acceleration hardware; relies on CPU-based vector instructions and AVX2.
- Suitable for lightweight inference and batch tasks; deep learning training is better served by GPUs.
Content Creation
Gaming
- Can handle modern games with a discrete GPU
- Lower single-core speed limits high-refresh gaming
- Great for multi-tasking while gaming
- Quad-channel memory and high core count do not significantly improve gaming framerates over dual-channel mainstream parts.
- Turbo Boost Max 3.0 provides slightly better single-core performance on lightly-threaded titles.
- PCIe 3.0 lanes are sufficient for current GPUs, but platform age limits upgrade options.
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- 6 cores / 12 threads
- 28 PCIe lanes
- Quad-channel memory
- Unlocked for overclocking
Cons
- High 140W TDP
- Older 14nm process
- Only 28 PCIe lanes
- Lacks integrated graphics
Pros
- 8 cores and 16 threads
- 40 PCIe 3.0 lanes
- Quad-channel DDR4 memory
- Unlocked for overclocking
- Turbo Boost Max 3.0 support
- Strong multi-threaded performance for its era
Cons
- High 140 W TDP
- No integrated graphics
- X99 platform is end-of-life
- PCIe 3.0 only
- Outperformed by newer CPUs in efficiency and per-core performance
Competitors & Alternatives
Intel Core i7-6800K
- AMD Ryzen 7 1700XRival
High-End Desktop
- Compare head-to-headIntel Core i7-5820KRival
High-End Desktop
- AMD Ryzen 7 1700Rival
High-End Desktop
- Compare head-to-headIntel Core i7-7800XRival
High-End Desktop
- Compare head-to-headIntel Core i7-6850KRival
High-End Desktop
- AMD Ryzen 5 5600XAlt
Vastly superior single-core speed and efficiency.
- Intel Core i5-12400FAlt
Modern alternative that beats it in almost everything.
- AMD Ryzen 7 5700XAlt
8 cores, better IPC, lower power.
Intel Core i7-6900K
- AMD Ryzen 7 1800XRival
Creator
- AMD Ryzen 7 1700Rival
Value Creator
- AMD Threadripper 1900XRival
Workstation
- RivalCompare head-to-head
- RivalCompare head-to-head
- AMD Ryzen 9 5900Alt
Higher efficiency and modern platform support.
Better gaming and productivity performance on a modern platform.
Compare head-to-headMore cores and stronger multi-threaded performance with DDR5.
Compare head-to-headStrong multi-threading and PCIe 5.0 for newer workstations.
Compare head-to-head- AMD Ryzen 9 5950XAlt
High core count on AM4 for legacy upgrades.
Our Verdict on Each
A solid entry point into the HEDT market, offering 6 cores and 28 PCIe lanes, though aging rapidly compared to modern alternatives.
Best for: Upgrading an existing X99 system for more cores.
Read the full reviewAn enthusiast-grade HEDT chip that still delivers strong multi-core performance and massive I/O bandwidth, but its age, high power draw, and platform EOL make it a niche choice today.
Best for: Upgrading an existing X99 system with an affordable used 8-core CPU
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i7-6800K or Intel Core i7-6900K?
Based on our editorial ratings, the Intel Core i7-6800K comes out ahead with a score of 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 i7-6800K or Intel Core i7-6900K?
For gaming, the Intel Core i7-6900K leads with a gaming performance score of 76/100 among Intel Core i7-6800K and Intel Core i7-6900K.
Do Intel Core i7-6800K and Intel Core i7-6900K use the same socket?
No. They use different sockets (Intel Core i7-6800K: Intel Socket 2011-3, Intel Core i7-6900K: 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 i7-6800K (6 cores), Intel Core i7-6900K (8 cores).
Which is faster in multi-core benchmarks?
The Intel Core i7-6800K posts the highest multi-core benchmark score. Multi-core results: Intel Core i7-6800K (13,000). Benchmark figures are approximate and workload-dependent.