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Intel Core i9-9900X

Intel · Core

Core i9-9900X

Released 2018

An unlocked 10-core Skylake-X refresh desktop processor with Hyper-Threading and four-channel DDR4 memory for LGA2066 enthusiast systems.

Model history · 6 models, 2012–2018
  1. 2012Core i7-3970XCompare
  2. 2013Core i7-4960XCompare
  3. 2014Core i7-5960XCompare
  4. 2016Core i7-6950XCompare
  5. 2017Core i9-7900XCompare
  6. 2018Core i9-9900X
Cores
10/20
Boost
4.5 GHz
L3
19.25 MB
Power
165 W
Socket
LGA2066

What reviewers say

ComputerBase found modest gains over the 7900X and limited overclocking headroom without strong cooling. Puget’s Premiere Pro 2019 tests found near-identical overall performance to the 7900X and preferred the cheaper 9900K for buyers who did not need 128 GB of memory. Both question the value of upgrading an existing ten-core Skylake-X system.

From computerbase.de, computerbase.de, computerbase.de, computerbase.de and pugetsystems.com

Specifications

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Cores and clocks

Cores
10
Threads
20
Base clock
3.5 GHz
Boost clock
4.5 GHz
L3 cache
19.25 MB
Cores
Skylake-X refresh; Hyper-Threading and an unlocked multiplier, confirmed by Intel’s exact-model launch table.
Clocks
Turbo Boost Max 3.0 up to 4.50 GHz on the preferred cores; ordinary Turbo Boost 2.0 up to 4.40 GHz. Intel’s October 2018 announcement planned November availability. Ark’s contemporary exact-model report confirms Japanese retail sale on 14 December 2018, but earlier worldwide sale was not established; year precision is retained.
Cache
19.25 MB Intel Smart Cache; L3 designation confirmed by ComputerBase’s exact-model technical table and Newegg listing.

Graphics and AI

Built-in graphics
No
Graphics
No processor graphics, explicitly confirmed by Intel’s exact-model support table.

Platform

Socket
LGA2066
Base power
165 W
Unlocked
Yes
Cooler in the box
No
Memory support
Up to 128 GB; four channels of DDR4-2666; 85 GB/s maximum published bandwidth; no ECC.
PCIe
44 CPU lanes; PCIe 3.0. The 68-lane family platform figure includes chipset lanes.
Chipsets
Intel X299; LGA2066.
Process
14 nm; Skylake-X refresh.
Cooler
Intel explicitly excludes a fan and heatsink from the boxed product. Intel’s support article confirms solder thermal interface material for this exact model; published junction limit 92°C.

Pros and cons

Pros

  • 10 cores and 20 threads
  • Four-channel memory controller
  • 44 CPU PCIe lanes

Cons

  • No integrated graphics
  • No boxed cooler
  • Requires an LGA2066 motherboard

Closest rivals

Model
CoresBoostL3PowerSocketReleased
IntelCore i9-9820X
10/204.2 GHz16.5 MB165 WLGA20662018
AMDRyzen Threadripper 2920X
12/244.3 GHz32 MB180 WsTR4Oct 2018
IntelCore i9-10900X
10/204.7 GHz19.25 MB165 WLGA20662019

Previous model: Core i9-7900X. Newer model: Core i9-10900X.

Sources

  1. intel.com/content/www/us/en/products/sku/189124/intel-core-i99900x-xseries-proc…
  2. download.intel.com/newsroom/2021/archive/2018-10-08-news-releases-intel-announc…
  3. intel.com/content/www/us/en/support/articles/000027144/processors/intel-core-pr…
  4. intel.com/content/www/us/en/support/articles/000024298/processors.html
  5. intel.com/content/www/us/en/support/articles/000037841/processors/intel-core-pr…
  6. ark-pc.co.jp/news/article/3002397
  7. newegg.com/core-i9-x-series-intel-core-i9-9900x/p/n82e16819117962
  8. computerbase.de/artikel/prozessoren/intel-skylake-x-amd-threadripper-test.65653

Photo: Newegg exact BX80673I99900X listing’s retail-box photograph; i9-9900X and LGA2066 label visible, original white background retained.

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