CPU Comparison
Intel Core i9-9820X vs Intel Core i9-9920X
A side-by-side comparison of specs, performance and value. The Intel Core i9-9820X is a 10-core, 20-thread high-end desktop processor from Intel’s 9th Gen Core X-Series (Skylake-X refresh), aimed at content creators and enthusiasts who need more PCIe lanes and quad‑channel memory than mainstream desktop platforms provide.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Gaming
Virtualization
Efficiency
Specialized Performance
AI / ML
- No dedicated AI or matrix acceleration hardware.
- Can handle CPU‑based inference and small models, but not competitive with modern NPUs or GPUs for serious AI workloads.
- 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
- Solid 60+ FPS experience in most AAA games at 1440p with a modern GPU.
- High single‑core boost helps with CPU‑bound titles and high‑refresh gaming.
- Newer mainstream and HEDT 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
- 10 cores and 20 threads for multi‑threaded workloads.
- 44 PCIe 3.0 lanes for multi‑GPU and NVMe arrays.
- Quad‑channel DDR4‑2666 up to 128 GB.
- Unlocked multiplier with granular overclocking controls.
- Turbo Boost Max 3.0 favors best cores for lightly‑threaded tasks.
- Good used‑market value for I/O‑heavy builds.
Cons
- High 165 W TDP and relatively low efficiency versus modern CPUs.
- 14 nm process shows its age in power and clock scaling.
- No integrated graphics; discrete GPU required.
- Discontinued platform with no upgrade path beyond LGA2066/X299.
- Newer mainstream and HEDT CPUs often outperform it per dollar and per watt.
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 i9-9820X
- AMD Ryzen Threadripper 1950XRival
HEDT
- AMD Ryzen Threadripper 2920XRival
HEDT
- RivalCompare head-to-head
- RivalCompare head-to-head
- AMD Ryzen 9 3900XRival
High-End Desktop
Same LGA2066 platform with 12 cores and slightly better multi‑threaded performance if you’re already on X299.
Compare head-to-head- AMD Ryzen Threadripper 2950XAlt
Much higher core count and memory bandwidth for serious workstation use, though more expensive and power‑hungry.
Better gaming and single‑thread performance on a mainstream platform, but fewer PCIe lanes and memory channels.
Compare head-to-head- Intel Core i7-14700KAlt
Modern hybrid architecture with strong gaming and creator performance, but again with fewer I/O lanes than X299.
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 10‑core HEDT processor with strong I/O and multi‑threaded performance, but outclassed in efficiency and value by newer mainstream and HEDT platforms.
Best for: Used or clearance HEDT builds where 44 PCIe lanes and quad‑channel memory are critical and platform cost is very low.
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
Do Intel Core i9-9820X 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 i9-9920X has the most cores. Core counts: Intel Core i9-9820X (10 cores), Intel Core i9-9920X (12 cores).