Intel Core i9-9980XE: What Real Users Think on Reddit

Name: Intel Core i9-9980XE
Brand: Intel

Mar 2026

Last Analyzed

4/10

Overall Rating

Positive Reviews

Negative Reviews

Summary

The Intel Core i9-9980XE is a Skylake-X HEDT processor that Reddit treats as a cautionary tale in Intel's lineup — an 18-core chip that launched at $2,000 and consistently lost the value argument to AMD Threadripper. Sentiment is mostly negative, with users pointing to its extreme price, lack of ECC support, and security vulnerability mitigations that actually made its successor perform worse. It finds a niche in workloads requiring AVX-512 and quad-channel memory bandwidth, and second-hand units have become more reasonable as the market moved on to Sapphire Rapids HEDT. Most Redditors view it as a product that only made sense if Intel gave it to you for free.

Pros

18 cores and 36 threads with AVX-512 support — useful for inference workloads, scientific computing, and heavy multithreaded tasks that specifically benefit from AVX-512
Quad-channel DDR4 memory with up to 128GB capacity gives it an edge in memory-bandwidth-heavy applications like video editing and large dataset processing
44 PCIe 3.0 lanes enable multi-GPU and multi-NVMe setups without bandwidth bottlenecks, making it viable for complex workstation builds
Overclocking headroom exists — users report stable clocks around 4.5–4.6GHz with adequate cooling, though it requires custom loop setups
Mesh interconnect architecture (essentially a 'baby Xeon') means it handles high core-count workloads more gracefully than mainstream consumer chips
Second-hand pricing has dropped significantly as users upgrade to Sapphire Rapids HEDT, making it accessible for budget workstation or homelab builds

Cons

No ECC memory support despite a $2,000 launch price — a glaring omission that competitors like AMD Threadripper 2950X included at a lower price point
Security vulnerability mitigations (Spectre, Meltdown, MDS) degraded real-world performance noticeably, and hardware fixes in the successor chip (10980XE) introduced their own performance penalties
Value proposition demolished by AMD — the Ryzen 9 3900X matched or exceeded it in most workloads at a fraction of the cost, and Threadripper 3000 series made it irrelevant for HEDT use cases
Overclocking ceiling is relatively low — hitting 4.5GHz all-core requires aggressive cooling and the chip doesn't scale nearly as well as older Skylake-X parts under extreme cooling
High TDP and power draw make it expensive to run long-term, and thermal management requires a 360mm AIO at minimum for sustained workloads
Still expensive on the used market for what it offers — some listings exceed €800, which is hard to justify when Zen 4 Threadripper and Sapphire Rapids HEDT exist

The AVX-512 Tax: Who Actually Needs This Chip?

Reddit's consensus is clear: unless your workload specifically demands AVX-512 and quad-channel memory, the 9980XE is hard to justify. Users building ML inference rigs and scientific compute nodes keep finding reasons to pick it up second-hand, but general-purpose buyers are almost universally redirected elsewhere.

A $2,000 CPU With No ECC Support

Redditors repeatedly called out one of the 9980XE's most baffling omissions — no ECC memory support, despite costing twice what AMD's Threadripper offered with ECC included. The chip carries Xeon-level pricing with consumer-grade memory reliability, a trade-off that frustrated even Intel loyalists.

Security Patches Broke Its Own Successor

One of the more discussed quirks in these threads: the 10980XE, designed to fix the 9980XE's security vulnerabilities in hardware, ended up performing worse in multithreaded workloads because of those very mitigations. This made the 9980XE the higher-performing chip by accident — a strange legacy for a product Reddit already considered a misstep.

User Reviews (41 of 178 analyzed)

146

ChronoBodir/intel23d agonegative

Hardware fixes in-silicon for security flaws on intel cpus. The fixes that are in the 10980XE impacts HT to a degree, making its multithreading slightly worse than the previous 9980XE. Also, 10980XE is really a refreshed variant of the same 7980XE sold from 2 years ago with extra new instructions and hardware fixes to protect against its security flaws.