Quick Verdict
A very powerful HEDT CPU with strong multi-threaded performance and excellent I/O, but high power consumption and a steep price make it hard to recommend over AMD’s Threadripper alternatives unless you specifically need Intel’s platform features.
Overview
Launch
2018
Status
DiscontinuedGeneration
9th Gen Core X-Series (Skylake-X refresh)
Market
High-End Desktop (HEDT)
The Intel Core i9-9980XE is an 18-core, 36-thread high-end desktop processor built on the Skylake-X architecture and manufactured on Intel’s 14nm++ process. Designed for the LGA2066 platform, it offers quad-channel DDR4-2666 memory support, 44 PCIe 3.0 lanes, and aggressive turbo frequencies up to 4.5 GHz via Turbo Boost Max 3.0, making it aimed at content creators, workstation users, and enthusiasts who need massive multi-threaded performance and ample I/O. Intel markets it as a 9th-gen Core X-Series part, but under the hood it is a Skylake-X refresh rather than a new microarchitecture, with the same 18-core die as the earlier i9-7980XE but higher clocks and solder thermal interface material for improved thermals. Launched in Q4 2018 and now discontinued, it was Intel’s flagship HEDT CPU until the Cascade Lake-X i9-10980XE arrived in late 2019.
Intel’s Core i9-9980XE sits at the top of the 9th-gen Core X-Series lineup. It combines 18 cores and 36 threads with quad-channel DDR4-2666 memory and 44 PCIe 3.0 lanes, delivering strong performance for heavily threaded workloads like 3D rendering and video encoding.
It’s essentially a higher-clocked, soldered version of the earlier i9-7980XE on a refined 14nm++ node, with improved turbo behavior. However, it’s also very expensive and power-hungry compared to AMD’s 2nd-gen Threadripper, which offers more cores and better value in many scenarios. If you’re invested in the X299 platform and need maximum Intel HEDT performance, the 9980XE delivers—but check the used market for realistic pricing.
Specifications
Performance
Strong multi-threaded performance in rendering, encoding, and other heavily threaded applications, though core-for-core efficiency lags newer architectures.
Excellent for running multiple VMs thanks to 18 cores, 36 threads, quad-channel memory, and abundant PCIe lanes for storage and networking.
Still capable of high-refresh-rate gaming and often faster than Threadripper in lightly threaded titles, but newer mainstream CPUs with higher IPC and efficiency generally surpass it for pure gaming.
High power consumption and heat output under load; requires robust cooling and a quality PSU, especially when overclocked.
- •Strong single-threaded and light-threaded performance thanks to high turbo clocks.
- •Often outperforms 1st- and 2nd-gen Threadripper in games at similar core counts.
- •Modern gaming-focused CPUs (e.g., Intel 13th/14th gen, AMD Ryzen 7000) are usually faster and more efficient.
- •No dedicated AI acceleration like Intel DL Boost or AVX-512 BF16.
- •AVX-512 is present, but focused on traditional HPC/rendering workloads.
- •Only suitable for CPU-based AI inference or small models; GPU acceleration is preferred for serious AI work.
Architecture
14nm++
Process Node
Skylake-X
Codename
18C / 36T
Core Config
24.75 MB
L3 Cache
165 W
TDP
Architecture Overview
The Core i9-9980XE uses Intel’s Skylake-X microarchitecture, a server-derivative design scaled up to 18 cores for the high-end desktop. It is not a new microarchitecture but a refined version of the same 18-core die introduced with the i9-7980XE, moved to Intel’s 14nm++ process and fitted with solder thermal interface material to enable higher frequencies and better thermals. This is why Intel and reviewers often describe it as a Skylake-X refresh rather than a true new generation.
CPU Design
The CPU features 18 physical Skylake cores, each supporting Hyper-Threading for 36 threads total. The cores share 24.75 MB of inclusive L3 cache (Smart Cache), and each core has its own L2 cache. The mesh interconnect fabric linking the cores and memory controllers is optimized for server and HEDT workloads, providing scalable bandwidth across all cores, though at the cost of higher latency than some ring-bus designs in lighter desktop chips.
Memory Subsystem
The integrated memory controller supports quad-channel DDR4 at an official speed of DDR4-2666. With four channels, the 9980XE can deliver substantially more bandwidth than dual-channel mainstream desktop parts, which benefits memory-bound workloads like large dataset processing, certain rendering tasks, and multi-GPU configurations. Maximum supported capacity is 128 GB according to Intel ARK.
PCIe & I/O
The processor exposes 44 PCIe 3.0 lanes directly from the CPU, intended for multiple graphics cards, NVMe SSDs, and high-speed peripherals. This is fewer than AMD’s 2nd-gen Threadripper (60 lanes), but still significantly more than mainstream desktop CPUs, making the 9980XE attractive for I/O-heavy workstations.
Overclocking
Like other Core X-Series Extreme Edition chips, the 9980XE features an unlocked multiplier, allowing enthusiasts to manually increase clock speeds. Combined with the solder thermal interface material, this can yield higher all-core overclocks compared to the i9-7980XE, though results vary depending on silicon quality and cooling. Reviewers found limited headroom beyond the stock turbo frequencies, with most chips maxing out around 4.2–4.4 GHz all-core under sustained loads.
- Higher base clock (3.0 GHz vs 2.6 GHz) and slightly higher turbo (4.4 GHz vs 4.2 GHz all-core, 4.5 GHz vs 4.4 GHz TB3.0).
- Move to 14nm++ process and solder thermal interface material for better thermals and sustained boost.
- Generally better performance at stock settings, especially in multi-threaded workloads, without increasing TDP.
Key Highlights
- 18 cores and 36 threads for demanding multi-threaded workloads.
- 44 PCIe 3.0 lanes for multi-GPU and high-speed storage configurations.
- Quad-channel DDR4-2666 with up to 128 GB capacity and high bandwidth.
- Solder thermal interface material improves cooling and turbo behavior.
- Unlocked multiplier for overclocking on X299 motherboards.
- Strong all-round performance in both lightly and heavily threaded tasks.
- Very high street price at launch and weak value versus AMD Threadripper.
- High power consumption and heat output, requiring robust cooling and PSU.
- 14nm++ process is now outdated, with much more efficient alternatives available.
- No integrated graphics, requiring a discrete GPU.
- Discontinued platform with no upgrade path beyond LGA2066/X299.
- AVX-512 and feature set lag newer Intel and AMD architectures for some workloads.
History
The Core i9-9980XE arrived in late 2018 as Intel’s response to AMD’s second-generation Ryzen Threadripper processors, which pushed HEDT core counts up to 32 with the Threadripper 2990WX. Intel’s initial 18-core Skylake-X flagship, the i9-7980XE, had launched just a year earlier at around $2,000, but AMD’s aggressive pricing and core-count advances forced Intel to refresh the lineup. Rather than a new microarchitecture, Intel delivered a Skylake-X refresh: the same 18-core die but on a refined 14nm++ process and with solder thermal interface material, enabling higher base and turbo clocks.
Reviews at the time praised the performance gains over the 7980XE and the improved thermals from STIM, but criticized the high price, which kept the 9980XE difficult to recommend over the 16-core Threadripper 2950X in terms of value. Intel positioned the 9980XE as a 9th-gen Core X-Series part, but under the hood it remained Skylake-X, and the platform would see one more refresh with the Cascade Lake-X i9-10980XE in late 2019 before Intel shifted focus back to mainstream desktop and server platforms.
Improvements over Previous Generation
- Higher base clock (3.0 GHz vs 2.6 GHz) and slightly higher turbo (4.4 GHz vs 4.2 GHz all-core, 4.5 GHz vs 4.4 GHz TB3.0).
- Move to 14nm++ process and solder thermal interface material for better thermals and sustained boost.
- Generally better performance at stock settings, especially in multi-threaded workloads, without increasing TDP.
Alternatives & Competitors
Should You Buy It?
Not Recommended for the right buyer
Used or heavily discounted upgrade for an existing X299 workstation where you need maximum cores and PCIe lanes without replacing the motherboard.
Avoid if…
- Building a new system from scratch in 2026 or later.
- Prioritizing power efficiency and thermals.
- Wanting a modern platform with DDR5, PCIe 5.0, or a long upgrade path.
Use Cases
Interesting Facts
The i9-9980XE is essentially a higher-clocked, soldered version of the i9-7980XE on the same 18-core Skylake-X die.
Intel and reviewers classify it as a 9th-gen Core X-Series part, but it uses the same Skylake-X architecture as the 7th-gen Core X-Series, not the newer Coffee Lake design.
It was Intel’s first HEDT CPU to ship with solder thermal interface material (STIM) instead of thermal paste under the IHS.
At launch, Intel’s recommended customer price was around $1,979, putting it well above most Threadripper 2950X configs on a price-per-core basis.
Despite being a 2018 HEDT flagship, its 44 PCIe lanes are still more than many mainstream 2026 desktop CPUs offer.
The 9980XE supports AVX-512, which was relatively rare on client CPUs at the time and is useful for some rendering and scientific workloads.
End of servicing updates for this CPU are scheduled for December 31, 2023, per Intel ARK.
It uses the same LGA2066 socket and X299 chipset as earlier Skylake-X HEDT CPUs, allowing BIOS upgrades on many existing boards.
Maximum official memory support is 128 GB DDR4-2666, well below what newer HEDT platforms can address.
In some games, the 9980XE could outperform 1st- and 2nd-gen Threadripper due to higher IPC and lower latency, even with fewer cores.
People Also Ask
Is the Intel Core i9-9980XE still good in 2026?
It’s still fast for multi-threaded workstation workloads if you already own an X299 motherboard, but newer CPUs are significantly more efficient and often faster, especially for gaming. It’s mainly worth considering on the used market.
Does the i9-9980XE support DDR5 memory?
No, it only supports DDR4 memory, officially up to DDR4-2666. DDR5 requires a newer platform such as Intel 12th+ gen or AMD AM5.
How many PCIe lanes does the Intel Core i9-9980XE have?
It has 44 PCIe 3.0 lanes directly from the CPU, which is more than mainstream desktop CPUs but fewer than AMD’s 2nd-gen Threadripper (60 lanes).
Is the i9-9980XE good for gaming?
It’s good but not optimal. Single-threaded performance is strong, but modern gaming-focused CPUs with higher IPC and efficiency usually perform better, especially at high refresh rates.
What is the difference between i9-7980XE and i9-9980XE?
The 9980XE has higher base and turbo clocks, moves to 14nm++ process, and uses solder thermal interface material, while the 7980XE uses 14nm+ and thermal paste. Core counts and cache are the same.
Does the i9-9980XE have integrated graphics?
No, it does not have integrated graphics. You must use a discrete GPU with this processor.
Can the i9-9980XE be overclocked?
Yes, it has an unlocked multiplier and can be overclocked on compatible X299 motherboards, though headroom is limited and thermals can be challenging.
What socket does the i9-9980XE use?
It uses the FCLGA2066 socket, commonly referred to as LGA2066, paired with the X299 chipset.
What is the TDP of the i9-9980XE?
The rated TDP is 165 watts, but actual power consumption can be significantly higher under full load, especially when overclocked.
Is the i9-9980XE better than Threadripper 2950X?
It trades blows: the 9980XE often has an edge in games and some lightly threaded apps, while the 2950X offers more cores, better value, and similar or better multi-threaded performance in many creator workloads.
Frequently Asked Questions
Does the Intel Core i9-9980XE support AVX-512?
Yes, it supports Intel AVX-512 instruction set extensions, which can accelerate certain floating-point and SIMD workloads, though not all software can use it.
What kind of cooling does the i9-9980XE need?
Given its 165W TDP and typical power draw under load, a high-end air cooler or 280–360mm AIO liquid cooler is recommended, especially if you plan to overclock.
What chipsets are compatible with the i9-9980XE?
It is designed for Intel X299 chipset motherboards using the LGA2066 socket, though BIOS updates may be required for full support on older boards.
How much memory can the i9-9980XE address?
Intel ARK lists a maximum memory size of 128 GB, using quad-channel DDR4-2666 modules.
Is the i9-9980XE good for virtualization?
Yes, with 18 cores and 36 threads, quad-channel memory, and 44 PCIe lanes, it is well-suited for running multiple virtual machines and lab environments.
Does the i9-9980XE support ECC memory?
No, Intel ARK indicates that ECC memory is not supported on this model. For ECC, you would typically look at Intel Xeon or certain AMD platforms.
What is the max turbo frequency of the i9-9980XE?
The maximum Turbo Boost 2.0 frequency is 4.4 GHz, and the Turbo Boost Max 3.0 frequency is 4.5 GHz for the best cores.
Can I use the i9-9980XE for a home server?
It can work, but it’s overkill for most home servers. Its high power draw and heat make lower-power modern platforms more attractive unless you specifically need lots of cores and PCIe lanes.
Is the i9-9980XE still under warranty from Intel?
Intel lists end of servicing updates for December 31, 2023, so new warranties are no longer available, but used chips may still be covered by retailer or seller warranties.
Should I buy an i9-9980XE or a newer mainstream CPU like the i7-14700K?
For most users, a newer mainstream CPU like the i7-14700K offers better gaming and efficiency, more modern features, and a longer upgrade path. The 9980XE is mainly interesting if you need lots of PCIe lanes and cores on an existing X299 platform.