AMD Ryzen 9 3900X

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AMD Ryzen 9 3900X
The Ryzen 9 3900X is a 12-core, 24-thread processor with a massive 64MB L3 cache. It runs at a base frequency of 3.8 GHz with a boost frequency of 4.6 GHz. If you use your PC for work, content creation, or essentially any productivity task that demands a fast CPU, the Ryzen 9 3900X delivers and the improvements in power efficiency are nothing short of amazing.
12
Cores
24
Threads
3.8 GHz
Base Clock
4.6 GHz
Boost Clock
Socket AM4
Socket
105 W
TDP
No iGPU
Graphics
$229
Price
Release date:Jul 7, 2019Price at Launch:$499
Cores:12Threads:24
Base Clock:3.8 GHzBoost Clock:4.6 GHz
Type:DesktopMultithreading:Yes
L2 Cache:6 MBL3 Cache:64 MB
Box Cooler:YesTDP:105 W
Socket:Socket AM4Memory Support:DDR4-3200
Codename:Matisse (Zen 2)Process Size:7nm
Integrated Graphics:NoNPU:No
PCIe Support:PCIe 4.0, 16 Lanes
Best CPUs 2020
Best CPUs 2020
Chosen by our editors as one of
the best products in its category
AMD Ryzen 9 9900X
A newer model is available:
AMD Ryzen 9 9900X

Performance Benchmarks

All benchmark data reflects aggregated results from dozens of tests conducted in TechSpot’s labs and compiled from our full library of CPU reviews. Single-core productivity scores are based primarily on Cinebench and Adobe Photoshop workloads. Multi-core results draw from Cinebench, Blender, Corona Benchmark, 7-Zip, Adobe Premiere Pro, and shader compilation tests. CPU gaming benchmarks are all 1080p runs (explainer) as published on TechSpot.

Single-Core Productivity

Multi-Core Productivity

Gaming Performance

Price History

AMD Ryzen 9 3900X pricing

Last 6 months
Price Date
Current $229 Nov 10, 2025
Highest* $484 Jul 1, 2025
Lowest* $229 Sep 18, 2025
Average $375
* Prices are based on listings from Newegg and other major retailers over the past 12+ months.
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Reviews and Ratings

91

Average Score

Based on 29 reviews

9.6

User Score

Based on 12,610 reviews

Reviewers Liked

  • Support for PCIe 4.0
  • Compatible with X470 motherboards
  • Incredible performance
  • Beats Intel at same price
  • 12-Cores, 24-Threads in a desktop platform!

Reviewers Didn't Like

  • Requires expensive X570 motherboards for PCIe 4.0 support
  • Gaming performance is still slower than Intel Coffee Lake at the ultra-high-end
  • Single core performance still behind
  • Higher idle power
  • No integrated graphics

Today's review will look at AMD's third-gen Ryzen processors, a sort of family overview if you will. This feature will serve as a quick and easy reference for those wanting to compare the Ryzen 3, 5, 7 and 9 series processors. It's rare that we feature...

By TechSpot on

Earlier this week we reviewed Intel's new Core i9-10900K and found that it was a strong performer, but it fell short of impressing in a world dominated by AMD's Ryzen lineup. For $500-ish it's a lot more expensive than the Ryzen 9 3900X, it's slower in...

By TechSpot on

Ryzen 5 3600 vs. Ryzen 9 3900X vs. Core i9-9900K: GPU Scaling Benchmark: If you’re looking at spending less than $700 on a graphics card, buying a Core i9-9900K or Ryzen 9 3900X, purely for gaming isn’t a great investment, you’re far better off with something like the R5 3600. In fact, purely for gaming I wouldn’t recommend either the 9900K or 3900X unless you’re dumping $1,000 on an RTX 2080 Ti.

By TechSpot on

Testing 3rd-Gen Ryzen DDR4 Memory Performance and Scaling: Ryzen doesn’t require premium memory to perform at its best and for those buying a Ryzen 5 model we’d actually strongly suggest avoiding spending money on expensive memory, just get the cheap stuff and tune it up if you’re getting a little too CPU bound.

By TechSpot on

A battle that needs no further introduction, we're pitting the new Ryzen 9 3900X head to head against the Core i9-9900K in 36 games. There's loads of results to go over and this article is solely focused on PC gaming performance. For more context on the...

By TechSpot on

Ryzen 9 3900X: Wraith Prism RGB Stock Cooler vs. 360mm AIO Liquid Cooler: If you care about value, the included box cooler really helps out. But on the other hand, if you want a beastly PC that can smash a rendering job faster than any other sub-$500 CPU and aren't tight with the budget, then sticking a more effective cooler on the 3900X certainly won’t hurt. We leave the cooler choice up to you.

By TechSpot on
90

AMD Ryzen 9 3900X and Ryzen 7 3700X Review: The 3900X was 8% slower than the 9900K on average at 1080p, so AMD’s halved the deficit to Intel in gaming. Then as we’ve found before with Ryzen, for almost anything else the 3900X buries the 9900K, while the 3700X delivers comparable performance. When it comes to power consumption the new Ryzen processors are extremely efficient.

By TechSpot on
90

The AMD Ryzen 9 3900X is one of the best processors available for demanding creative tasks, thanks to super-high multi-core performance. It’s a versatile chip, too, with gaming performance proving to be solid. However, the Intel Core i9-9900K still holds the advantage here if you’re looking for a CPU for a dedicated gaming PC.

By TrustedReviews on
90

The Ryzen 9 3900X is easily the most compelling enthusiast CPU from AMD in the past 15 years. It can do everything you need and then some, even if it's marginally slower in some...

By PC Gamer on
90

For demanding creative tasks, the AMD Ryzen 9 3900X is one of the best processors available thanks to a super-high multi-core performance. It's also a versatile chip, with gaming performance proving to be solid – although the Intel Core i9-9900K still...

By Trusted Reviews on
95

AMD has proven with the Ryzen 9 3900X that they are no longer following, and are now the industry leader for enthusiast CPU’s

By CGM on
90

Going up against a competitor as big and well known as Intel must be hugely daunting, but AMD has pulled off a surprising series of victories after starting from scratch with its first-generation Zen architecture in 2017. The company has slowly begun...

By Gadgets360 on
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