CPU Comparison
Intel Core i7-9800X vs Intel Core i9-9820X
A side-by-side comparison of specs, performance and value. The Intel Core i7-9800X is a high-end desktop (HEDT) processor launched in October 2018 as part of the 9th Generation X-Series lineup. Built on the Skylake-X microarchitecture and utilizing Intel's 14nm process, this processor is designed for enthusiasts, content creators, and professionals requiring immense multi-threaded performance. It features 8 physical cores and supports 16 threads via Hyper-Threading. Operating at a base clock of 3.8 GHz and boosting up to 4.5 GHz, it delivers strong single-core responsiveness alongside its multi-core prowess. A standout feature is its 44 PCIe 3.0 lanes, enabling massive expansion capabilities for multiple GPUs and high-speed NVMe storage arrays. It also supports quad-channel DDR4 memory, providing exceptional memory bandwidth. Unlike mainstream desktop chips, the i7-9800X lacks integrated graphics, requiring a dedicated GPU. With a 165W TDP, it demands robust cooling and power delivery. It remains a capable workstation chip for users needing extensive I/O and parallel processing power.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Excellent multi-core performance for creator applications and heavy multitasking.
Strong multi‑threaded performance in content creation workloads, though 12‑ and 14‑core X‑Series parts and newer Ryzen 9/Threadripper models pull ahead in heavily parallel tasks.
Gaming
Good gaming performance, though newer mainstream CPUs often outperform it in single-core.
Still capable for 60+ FPS in most modern titles at high settings, but newer mainstream and HEDT CPUs often deliver better minimums and efficiency.
Virtualization
44 PCIe lanes and 16 threads make it ideal for complex virtualization setups.
Excellent for running several VMs simultaneously thanks to 10 cores and quad‑channel memory, but platform is now end‑of‑life with no upgrade path beyond LGA2066.
Efficiency
165W TDP and 14nm process result in high power consumption and heat.
High 165 W TDP and 14 nm process mean significantly more power draw than modern 10‑core designs for similar or better performance.
Specialized Performance
AI / ML
- AVX-512 instructions accelerate certain AI workloads
- High core count aids CPU-based inference
- 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.
Content Creation
Gaming
- Strong frequency for gaming
- PCIe lanes allow for multiple GPUs
- Not the best choice for purely gaming due to HEDT latency
- 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.
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- 44 PCIe 3.0 lanes
- Quad-channel memory support
- Unlocked for overclocking
- Strong multi-threaded performance
Cons
- High 165W TDP
- 14nm process is inefficient
- No integrated graphics
- Expensive platform (X299)
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.
Competitors & Alternatives
Intel Core i7-9800X
- AMD Ryzen 7 2700XRival
Desktop
- AMD Threadripper 2920XRival
High-End Desktop
- Compare head-to-headIntel Core i7-7820XRival
High-End Desktop
- AMD Ryzen 9 3900XRival
Desktop
- Compare head-to-headIntel Core i9-7900XRival
High-End Desktop
10th Gen refresh with slightly better performance and thermals.
Compare head-to-head- AMD Ryzen 9 5950XAlt
Vastly superior efficiency and multi-core performance on a modern platform.
Modern mainstream CPU that outperforms it in almost every metric.
Compare head-to-head- AMD Threadripper 3960XAlt
Much higher core count for professional HEDT workloads.
Better gaming performance and efficiency at a lower price.
Compare head-to-head
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-headModern hybrid architecture with strong gaming and creator performance, but again with fewer I/O lanes than X299.
Compare head-to-head
Our Verdict on Each
A powerful HEDT processor offering excellent PCIe expansion and quad-channel memory, though its high TDP and older 14nm process make it less efficient than modern alternatives.
Best for: If you are considering the Intel Core i7-9800X today, it should strictly be viewed as a budget option for a used workstation build. Its 8 cores, 44 PCIe lanes, and quad-channel memory support make it highly capable for 3D rendering, complex virtualization, and heavy multitasking. However, the 165W TDP means you will need a robust power supply and high-end cooling solution. Avoid this processor if your primary goal is gaming, as mainstream CPUs offer better single-core performance and efficiency at a lower price point. It is best suited for creators who need massive PCIe expansion on a budget and are comfortable building on a refurbished X299 platform. For new builds, modern platforms offer significantly better performance per watt.
Read the full reviewA 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 reviewFrequently Asked Questions
Which is faster for gaming, Intel Core i7-9800X or Intel Core i9-9820X?
For gaming, the Intel Core i7-9800X leads with a gaming performance score of 80/100 among Intel Core i7-9800X and Intel Core i9-9820X.
Do Intel Core i7-9800X and Intel Core i9-9820X use the same socket?
No. They use different sockets (Intel Core i7-9800X: Intel Socket 2066, Intel Core i9-9820X: FCLGA2066), so each needs a compatible motherboard.
Which has more cores?
The Intel Core i9-9820X has the most cores. Core counts: Intel Core i7-9800X (8 cores), Intel Core i9-9820X (10 cores).