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
Strong multi-threaded performance in Cinebench, Blender, and video encoding workloads, competing with Ryzen 9 3950X in many tests.
Very strong in multi-threaded creator applications; competitive with early 2nd-gen Threadripper and superior to mainstream 8-core parts of its era.
Gaming
Still capable of high-refresh-rate gaming at 1080p and 1440p, but modern mainstream and HEDT CPUs often deliver better minimums and efficiency.
Smooth high-refresh gameplay at 1440p in most titles, but newer mainstream CPUs often deliver better minimums and efficiency.
Virtualization
Excellent for running multiple VMs or containers thanks to high core count, quad-channel memory, and extensive PCIe connectivity.
Excellent for running multiple VMs due to high core count, quad-channel memory, and VT-d/VT-x support.
Efficiency
High power draw and heat output compared to newer 7 nm and 10 nm designs; needs robust cooling and a strong PSU.
High power draw and heat output under load; significantly less efficient than modern 12-core and 16-core CPUs from both Intel and AMD.
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).