CPU Comparison
Intel Core i9-10940X vs Intel Core i9-7940X
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.
- AVX-512 helps with some vector calculations
- No dedicated AI acceleration hardware
- CPU-based inference is significantly slower than modern NPUs or GPUs
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 clock speeds help push frames in CPU-bound scenarios
- Mesh architecture adds slight latency compared to ring bus designs
- Lacks the cache size and IPC of modern gaming CPUs
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
- 14 cores and 28 threads
- 44 PCIe 3.0 lanes for expansive I/O
- Quad-channel DDR4 memory support
- AVX-512 instruction support
- Unlocked multiplier for overclocking
Cons
- Runs extremely hot under heavy loads
- High power consumption for the performance delivered
- Lacks integrated graphics
- Discontinued and outdated platform
- Outpaced by modern mainstream CPUs in efficiency and IPC
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 i9-7940X
- AMD Ryzen Threadripper 1950XRival
Workstation
- AMD Ryzen Threadripper 1920XRival
Workstation
- Compare head-to-headIntel Core i9-7960XRival
High-End Desktop
- Intel Core i9-7900XRival
High-End Desktop
- Intel Core i7-7820XRival
High-End Desktop
Newer Cascade Lake-X alternative on the same platform with better value and refined behavior.
Compare head-to-head- AMD Ryzen 9 5900XAlt
Much more efficient, faster single-core, and relies on a modern AM4 platform.
- Intel Core i7-13700KAlt
Massively faster single-core and multi-core performance with modern features at a lower power draw.
Modern platform with DDR5 and PCIe 5.0, offering vastly superior efficiency.
Compare head-to-headTop-tier modern performance for any workload, leaving the 7940X far behind.
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 potent HEDT processor for its time, the i9-7940X offers strong multi-core capabilities but suffers from high heat output and is outpaced by modern mainstream chips.
Best for: Upgrading an existing LGA 2066 workstation on a tight budget.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i9-10940X or Intel Core i9-7940X?
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 i9-7940X?
For gaming, the Intel Core i9-10940X leads with a gaming performance score of 80/100 among Intel Core i9-10940X and Intel Core i9-7940X.
Do Intel Core i9-10940X and Intel Core i9-7940X use the same socket?
No. They use different sockets (Intel Core i9-10940X: FCLGA2066, Intel Core i9-7940X: LGA 2066), so each needs a compatible motherboard.