CPU Comparison
Intel Core i7-6850K vs Intel Core i9-9820X
A side-by-side comparison of specs, performance and value. The Intel Core i7-6850K is a six-core, 12-thread high-end desktop processor on the X99 platform, featuring 40 PCI Express 3.0 lanes, quad-channel DDR4-2400 memory support, and an unlocked multiplier.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Gaming
Virtualization
Efficiency
Specialized Performance
AI / ML
- No dedicated AI acceleration hardware; runs only CPU-based inference.
- AVX2 support helps with some vectorized compute workloads.
- No dedicated AI or matrix acceleration hardware.
- Can handle CPU‑based inference and small models, but not competitive with modern NPUs or GPUs for serious AI workloads.
Content Creation
Gaming
- Base and turbo clocks are sufficient for high-refresh gaming with a capable GPU.
- PCIe 3.0 x16 remains viable for current graphics cards.
- Gaming performance is limited by older IPC and DDR4-2400 compared to newer platforms.
- Solid 60+ FPS experience in most AAA games at 1440p with a modern GPU.
- High single‑core boost helps with CPU‑bound titles and high‑refresh gaming.
- Newer mainstream and HEDT CPUs often deliver better 1% lows and efficiency.
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Six cores and 12 threads
- 40 PCIe 3.0 lanes
- Quad-channel DDR4-2400
- Unlocked multiplier with Turbo Boost Max 3.0
- Strong I/O expansion for multi-GPU/NVMe
- VT-x and VT-d support for virtualization
Cons
- No integrated graphics
- High 140 W TDP
- Discontinued platform with limited future upgrade path
- Lower memory speed limit (DDR4-2400)
- Not on official Windows 11 supported processor list
Pros
- 10 cores and 20 threads for multi‑threaded workloads.
- 44 PCIe 3.0 lanes for multi‑GPU and NVMe arrays.
- Quad‑channel DDR4‑2666 up to 128 GB.
- Unlocked multiplier with granular overclocking controls.
- Turbo Boost Max 3.0 favors best cores for lightly‑threaded tasks.
- Good used‑market value for I/O‑heavy builds.
Cons
- High 165 W TDP and relatively low efficiency versus modern CPUs.
- 14 nm process shows its age in power and clock scaling.
- No integrated graphics; discrete GPU required.
- Discontinued platform with no upgrade path beyond LGA2066/X299.
- Newer mainstream and HEDT CPUs often outperform it per dollar and per watt.
Competitors & Alternatives
Intel Core i7-6850K
- AMD Ryzen 7 1800XRival
Creator
- AMD Ryzen 5 1600XRival
Mainstream
- Intel Core i7-7700KRival
Gaming
- Compare head-to-headIntel Core i7-5820KRival
Workstation
- RivalCompare head-to-head
Much faster gaming and creator performance on a newer platform with upgrade options.
Compare head-to-head- AMD Ryzen 9 5900XAlt
Significantly higher multi-core performance and efficiency on AM4.
- AMD Ryzen 7 5800XAlt
Strong single and multi-threaded performance for gaming and productivity.
- Intel Core i7-14700KAlt
Modern high-performance option with DDR5 and PCIe 5.0 support.
Intel Core i9-9820X
- AMD Ryzen Threadripper 1950XRival
HEDT
- AMD Ryzen Threadripper 2920XRival
HEDT
- RivalCompare head-to-head
- RivalCompare head-to-head
- AMD Ryzen 9 3900XRival
High-End Desktop
Same LGA2066 platform with 12 cores and slightly better multi‑threaded performance if you’re already on X299.
Compare head-to-head- AMD Ryzen Threadripper 2950XAlt
Much higher core count and memory bandwidth for serious workstation use, though more expensive and power‑hungry.
Better gaming and single‑thread performance on a mainstream platform, but fewer PCIe lanes and memory channels.
Compare head-to-head- Intel Core i7-14700KAlt
Modern hybrid architecture with strong gaming and creator performance, but again with fewer I/O lanes than X299.
Our Verdict on Each
A capable HEDT chip with strong multi-threaded performance and plentiful I/O for its time, but high power draw and a discontinued platform make it relevant mainly as a budget used upgrade.
Best for: Upgrade for existing X99/LGA2011-v3 systems seeking more cores or PCIe lanes at low cost.
Read the full reviewA capable 10‑core HEDT processor with strong I/O and multi‑threaded performance, but outclassed in efficiency and value by newer mainstream and HEDT platforms.
Best for: Used or clearance HEDT builds where 44 PCIe lanes and quad‑channel memory are critical and platform cost is very low.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i7-6850K or Intel Core i9-9820X?
Based on our editorial ratings, the Intel Core i9-9820X 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 i7-6850K or Intel Core i9-9820X?
For gaming, the Intel Core i9-9820X leads with a gaming performance score of 78/100 among Intel Core i7-6850K and Intel Core i9-9820X.
Which uses less power?
The Intel Core i7-6850K has the lowest rated TDP. Power draw across these chips: Intel Core i7-6850K (140 W), Intel Core i9-9820X (165 W).
Do Intel Core i7-6850K and Intel Core i9-9820X use the same socket?
No. They use different sockets (Intel Core i7-6850K: LGA2011-v3, Intel Core i9-9820X: FCLGA2066), so each needs a compatible motherboard.
Which has more cores?
The Intel Core i9-9820X has the most cores. Core counts: Intel Core i7-6850K (6 cores), Intel Core i9-9820X (10 cores).