CPU Comparison
Intel Core i7-7820X X-series vs Intel Core i9-9980XE
A side-by-side comparison of specs, performance and value. The Intel Core i7-7820X is an 8-core, 16-thread high-end desktop processor on the X299 platform, offering quad-channel DDR4-2666, 28 PCIe 3.0 lanes, and AVX-512 support for workstation and creator workloads.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Gaming
Virtualization
Efficiency
Specialized Performance
AI / ML
- No dedicated AI acceleration hardware
- AVX-512 can help certain CPU-bound inference tasks
- Most modern AI workloads are better served by GPUs
- No dedicated AI acceleration like Intel DL Boost or AVX-512 BF16.
- AVX-512 is present, but focused on traditional HPC/rendering workloads.
- Only suitable for CPU-based AI inference or small models; GPU acceleration is preferred for serious AI work.
Content Creation
Gaming
- Capable of high-refresh gaming with a strong GPU
- Single-core boost reaches up to 4.5 GHz on favored cores
- Modern CPUs offer better gaming efficiency and higher IPC
- Strong single-threaded and light-threaded performance thanks to high turbo clocks.
- Often outperforms 1st- and 2nd-gen Threadripper in games at similar core counts.
- Modern gaming-focused CPUs (e.g., Intel 13th/14th gen, AMD Ryzen 7000) are usually faster and more efficient.
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- 8 cores and 16 threads for multi-threaded workloads
- Quad-channel DDR4 memory increases bandwidth
- 28 PCIe 3.0 lanes plus chipset lanes for expansion
- Turbo Boost Max 3.0 for higher single-core boosts
- AVX-512 support for optimized workloads
- Unlocked multiplier for overclocking
Cons
- High 140 W TDP and power consumption
- No integrated graphics
- Only 28 CPU PCIe lanes, limiting multi-GPU configurations
- Discontinued platform with limited future upgrades
- Older 14 nm process versus modern smaller nodes
Pros
- 18 cores and 36 threads for demanding multi-threaded workloads.
- 44 PCIe 3.0 lanes for multi-GPU and high-speed storage configurations.
- Quad-channel DDR4-2666 with up to 128 GB capacity and high bandwidth.
- Solder thermal interface material improves cooling and turbo behavior.
- Unlocked multiplier for overclocking on X299 motherboards.
- Strong all-round performance in both lightly and heavily threaded tasks.
Cons
- Very high street price at launch and weak value versus AMD Threadripper.
- High power consumption and heat output, requiring robust cooling and PSU.
- 14nm++ process is now outdated, with much more efficient alternatives available.
- No integrated graphics, requiring a discrete GPU.
- Discontinued platform with no upgrade path beyond LGA2066/X299.
- AVX-512 and feature set lag newer Intel and AMD architectures for some workloads.
Competitors & Alternatives
Intel Core i7-7820X X-series
- AMD Ryzen 7 1800XRival
Creator/Gaming
- AMD Ryzen 7 1700XRival
Creator/Gaming
- AMD Ryzen Threadripper 1920XRival
Workstation
- AMD Ryzen Threadripper 1950XRival
Workstation
- Intel Core i9-7900XRival
HEDT
- Intel Core i7-14700KAlt
More cores, higher efficiency, and DDR5 on a modern mainstream platform.
- AMD Ryzen 9 7900Alt
Strong multi-threaded performance with excellent efficiency.
- AMD Ryzen 9 5900XAlt
12-core AM4 option with strong gaming and creator performance.
- Intel Core i7-13700KAlt
High-performance mainstream platform with good upgrade path.
- AMD Ryzen Threadripper 2950X (used)Alt
Higher core and lane count for workstation-class workloads.
Intel Core i9-9980XE
- AMD Ryzen Threadripper 2950XRival
HEDT / Creator
- AMD Ryzen Threadripper 2990WXRival
HEDT / Workstation
- Compare head-to-headIntel Core i9-10980XERival
HEDT / Workstation
- Compare head-to-headIntel Core i9-7980XERival
HEDT / Workstation
- Intel Xeon W-3175XRival
Workstation
- AMD Ryzen 9 7950XAlt
Much more efficient, modern platform (AM5, DDR5, PCIe 5.0), and strong creator performance at a lower price point.
Far better gaming and single-threaded performance with higher efficiency on a mainstream platform, though with fewer PCIe lanes.
Compare head-to-head- AMD Ryzen Threadripper (3rd gen or later)Alt
Higher core counts, more PCIe lanes, and better multi-threaded performance for serious workstation use.
- AMD Ryzen 9 7900Alt
More balanced performance-per-watt and modern features if you don’t need extreme core counts or lots of PCIe lanes.
Our Verdict on Each
A competent eight-core HEDT chip with strong multi-threaded performance and platform expansion, though high power draw and limited PCIe lanes compared to higher-tier X299 CPUs make it a niche choice today.
Best for: Used-market upgrade for an existing X299 build with quad-channel DDR4 and a need for more cores than mainstream.
Read the full reviewA very powerful HEDT CPU with strong multi-threaded performance and excellent I/O, but high power consumption and a steep price make it hard to recommend over AMD’s Threadripper alternatives unless you specifically need Intel’s platform features.
Best for: Used or heavily discounted upgrade for an existing X299 workstation where you need maximum cores and PCIe lanes without replacing the motherboard.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i7-7820X X-series or Intel Core i9-9980XE?
Based on our editorial ratings, the Intel Core i9-9980XE comes out ahead with a score of 8.2/10. 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 i7-7820X X-series or Intel Core i9-9980XE?
For gaming, the Intel Core i9-9980XE leads with a gaming performance score of 80/100 among Intel Core i7-7820X X-series and Intel Core i9-9980XE.
Which uses less power?
The Intel Core i7-7820X X-series has the lowest rated TDP. Power draw across these chips: Intel Core i7-7820X X-series (140 W), Intel Core i9-9980XE (165 W).
Do Intel Core i7-7820X X-series and Intel Core i9-9980XE use the same socket?
No. They use different sockets (Intel Core i7-7820X X-series: LGA2066, Intel Core i9-9980XE: FCLGA2066), so each needs a compatible motherboard.
Which has more cores?
The Intel Core i9-9980XE has the most cores. Core counts: Intel Core i7-7820X X-series (8 cores), Intel Core i9-9980XE (18 cores).