CPU Comparison
Intel Core i9-10940X vs Intel Core i9-9920X
A side-by-side comparison of specs, performance and value. The Intel Core i9-10940X is a 14-core, 28-thread high-end desktop processor based on the Cascade Lake-X architecture, designed for creators, workstation users, and enthusiasts who need high core counts, quad-channel memory, and extensive PCIe connectivity on the LGA2066 platform.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Gaming
Virtualization
Efficiency
Specialized Performance
AI / ML
- Intel Deep Learning Boost (AVX-512 VNNI) accelerates some CPU-based inference workloads.
- No dedicated AI hardware like modern NPUs; GPU offload is still preferred for large models.
- 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
- Strong single-core and lightly-threaded performance due to good boost clocks.
- Capable of 144+ FPS in many titles at 1080p with a modern GPU.
- Newer gaming-focused CPUs often deliver better 1% lows and efficiency.
- 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
- 14 cores and 28 threads for heavily threaded workloads
- 48 PCIe 3.0 lanes for multi-GPU and NVMe setups
- Quad-channel DDR4-2933 with up to 256 GB support
- Unlocked multiplier with strong overclocking headroom
- AVX-512 and DL Boost for vectorized and AI inference tasks
- Excellent for virtualization and multi-VM environments
Cons
- High 165 W TDP and real-world power draw under load
- Older 14 nm process less efficient than 7 nm or 10 nm competitors
- No integrated graphics; requires a discrete GPU
- Discontinued platform with no future CPU upgrades
- X299 platform is mature but showing its age compared to newer chipsets
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 i9-10940X
- AMD Ryzen 9 3950XRival
High-End Desktop / Creator
- AMD Ryzen 9 3900XRival
High-End Desktop / Creator
- AMD Ryzen Threadripper 2920XRival
HEDT / Workstation
- Compare head-to-headIntel Core i9-10980XERival
HEDT / Workstation
- Compare head-to-headIntel Core i9-9940XRival
Previous-Gen HEDT
- Intel Core i7-14700KAlt
Modern platform with better gaming and efficiency; great for mixed gaming/creator use.
- AMD Ryzen 9 7900Alt
Much more efficient with strong multi-threaded performance on a current platform.
- AMD Ryzen Threadripper 3960XAlt
Far more cores and PCIe lanes for serious workstation workloads if budget allows.
Slightly cheaper 10-core X-Series alternative if you need fewer cores but still want X299 I/O.
Compare head-to-head
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 powerful HEDT CPU with strong multi-threaded performance and excellent I/O expansion, but its high power draw and aging platform make it mainly interesting for used builds or existing X299 users.
Best for: Used workstation or creator build on X299 where you already have a motherboard or can buy one cheap.
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 i9-10940X or Intel Core i9-9920X?
Based on our editorial ratings, the Intel Core i9-10940X comes out ahead with a score of 8.4/10. 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 i9-10940X or Intel Core i9-9920X?
For gaming, the Intel Core i9-10940X leads with a gaming performance score of 80/100 among Intel Core i9-10940X and Intel Core i9-9920X.
Do Intel Core i9-10940X and Intel Core i9-9920X use the same socket?
Yes — all of these CPUs use the FCLGA2066 socket, so they share compatible motherboards.
Which has more cores?
The Intel Core i9-10940X has the most cores. Core counts: Intel Core i9-10940X (14 cores), Intel Core i9-9920X (12 cores).