CPU Comparison
Intel Core i9-7920X X-series vs Intel Core i9-9920X
A side-by-side comparison of specs, performance and value. The Intel Core i9-7920X is a 12-core, 24-thread high-end desktop processor built on Skylake-X with quad-channel DDR4-2666 memory, up to 44 PCIe 3.0 lanes, and no integrated graphics. Designed for X299 platforms, it targets enthusiasts, creators, and workstation users who need multi-core throughput and I/O expansion in a desktop form factor.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Gaming
Virtualization
Efficiency
Specialized Performance
AI / ML
- No dedicated AI acceleration hardware.
- Suitable for CPU-based inference or traditional machine learning preprocessing.
- Workloads heavily dependent on modern AI accelerators will run much slower.
- No dedicated AI or matrix hardware beyond AVX-512.
- Can handle CPU-based inference for small models, but is outclassed by modern NPUs and GPUs for serious AI workloads.
Content Creation
Gaming
- Sufficient for high-refresh gaming when paired with a strong GPU.
- Turbo Boost Max 3.0 can elevate single-core performance for less threaded titles.
- Modern gaming CPUs tend to offer better efficiency and higher sustained clocks.
- High single-core boost (4.4/4.5 GHz) keeps frame rates high in CPU-heavy titles.
- Quad-channel memory can help in some CPU-limited scenarios.
- Modern 6–8 core mainstream CPUs often match or beat it in gaming while using less power.
- Best paired with a high-end GPU for balanced system; GPU bottlenecks are more likely at 4K.
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- 12 cores and 24 threads
- Quad-channel DDR4-2666 memory support
- Up to 44 PCIe 3.0 lanes for expansion
- Unlocked multiplier for overclocking
- Turbo Boost Max 3.0 for lightly threaded tasks
- AVX-512 instruction support
- Strong multi-threaded performance for its time
Cons
- High power consumption under load
- No integrated graphics
- Platform (X299/LGA2066) is discontinued
- Newer platforms offer better efficiency and value
- PCIe 3.0 instead of newer generations
Pros
- 12 cores and 24 threads for heavily threaded workloads.
- 44 PCIe 3.0 lanes for multi-GPU and fast storage.
- Quad-channel DDR4-2666 with up to 128 GB official support.
- AVX-512 support for specialized vectorized workloads.
- Unlocked multiplier for overclocking on X299.
- Strong multi-threaded performance for its era.
Cons
- High 165 W TDP and real-world power draw under load.
- 14 nm Skylake-X is less efficient than modern architectures.
- No integrated graphics; discrete GPU required.
- X299 platform is discontinued with no upgrade path beyond Cascade Lake-X.
- Newer CPUs (Ryzen 9 3900X, 12th+ gen Intel) often offer better performance per watt and per dollar.
Competitors & Alternatives
Intel Core i9-7920X X-series
- AMD Ryzen Threadripper 1920XRival
Workstation
- AMD Ryzen Threadripper 1950XRival
Workstation
- AMD Ryzen 9 3900XRival
Creator
- AMD Ryzen 9 3950XRival
Creator
- Compare head-to-headIntel Core i9-10920XRival
Workstation
Cascade Lake-X refresh with improved features and clocks on X299.
Compare head-to-head- AMD Ryzen 9 5900XAlt
Stronger efficiency and gaming performance on AM4 platform.
- AMD Ryzen 9 7900Alt
Modern AM5 platform with DDR5 and PCIe 5.0 for new builds.
- AMD Threadripper 3000/4000 seriesAlt
Higher core counts and more I/O for professional workstations.
- Intel Core i7-14700KAlt
Good mainstream alternative for gaming and content creation with lower power.
Intel Core i9-9920X
- AMD Ryzen Threadripper 2920XRival
HEDT / Workstation
- AMD Ryzen 9 3900XRival
High-End Desktop
- Compare head-to-headIntel Core i9-10920XRival
HEDT / Workstation
- Intel Core i9-7900XRival
HEDT / Workstation
- Compare head-to-headIntel Core i9-9980XERival
HEDT / Workstation
- Intel Core i7-14700KAlt
Much faster for gaming and lightly threaded tasks, with far better efficiency and a modern platform.
- AMD Ryzen 9 7900Alt
Modern 12C/24T Zen 4 CPU with DDR5, PCIe 5.0, and significantly lower power draw.
Higher performance in both gaming and productivity with a newer feature set, though also high power.
Compare head-to-head
Our Verdict on Each
A capable HEDT chip with strong multi-threaded performance and ample I/O, but power-hungry by modern standards and best pursued used or for legacy X299 builds.
Best for: Upgrading or completing an existing LGA2066/X299 build at a low used price
Read the full reviewA capable HEDT CPU with excellent multi-threaded performance and expansive I/O, but high power consumption and an aging platform make it primarily interesting for used workstation builds rather than new systems.
Best for: Used workstation or HEDT build where X299, quad-channel memory, and many PCIe lanes are requirements, and a modern platform upgrade is not feasible.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i9-7920X X-series or Intel Core i9-9920X?
Based on our editorial ratings, the Intel Core i9-9920X 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 uses less power?
The Intel Core i9-7920X X-series has the lowest rated TDP. Power draw across these chips: Intel Core i9-7920X X-series (140 W), Intel Core i9-9920X (165 W).
Do Intel Core i9-7920X X-series and Intel Core i9-9920X use the same socket?
No. They use different sockets (Intel Core i9-7920X X-series: LGA2066, Intel Core i9-9920X: FCLGA2066), so each needs a compatible motherboard.