Ryzen 9 3900X
The Ryzen 9 3900X is AMD’s 12-core, 24-thread processor for the AM4 platform, built on the Zen 2 architecture. Below you’ll find its full spec sheet with gaming and productivity benchmarks, plus every retailer’s current price.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
Gaming performance
CPU-bound gaming score: a 1080p rating normalized so the fastest gaming CPU we track = 100. Productivity scores are in the Benchmarks section below.
1080p Gaming
The Ryzen 9 3900X scores 42.0 on our 0–100 CPU gaming scale, tested at 1080p where the processor, not the graphics card, sets the frame rate. At 1440p and 4K the gap between CPUs shrinks as the GPU takes over.
Performance-per-dollar rank among all CPUs with live pricing
Gaming value
#76
of 150
Productivity value
—
Benchmarks
Standardized productivity scores for this chip, each compared to the fastest CPU we track and linked to its source. Multi-core tracks heavy parallel work like rendering and encoding; single-core tracks everyday responsiveness.
Multi-core
Single-core
Where to buy the Ryzen 9 3900X
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Newegg | In stock | $199.00 |  |
The Ryzen 9 3900X starts from $199.00 across 1 retailer. Prices update daily from live stock.
Complete the build
The cheapest in-stock parts that actually fit the Ryzen 9 3900X — matched on socket and power delivery using the same rules as our PC Builder, priced live.
The Ryzen 9 3900X's bundled Wraith Prism can't keep up with its sustained power draw, so an aftermarket cooler is the safer buy. This is the cheapest air cooler in stock that fits AM4 and handles its heat.
Contains affiliate links. Prices update regularly and may differ at the retailer.
Specifications
Cores & Clocks
- Cores / Threads
- 12 / 24
- P-cores
- 12
- E-cores
- 0
- Base clock
- 3.8 GHz
- Boost clock
- 4.6 GHz
- Architecture
- Zen 2
Cache & Process
- L3 cache
- 64 MB
- L2 cache
- 6 MB
- Process node
- TSMC N7
- Released
- 2019-07-07
Memory & Platform
- Socket
- AM4
- Memory channels
- 2
- Max memory
- 128 GB
- Memory support
- DDR4, 3200
- Chipsets
- "A300, X300, A320, B350, X370, B450, X470, A520, B550, X570"
- PCIe
- PCIe 4.0
- ECC support
- No
Power & Extras
- TDP
- 105W
- Max power
- 142W
- Integrated graphics
- None
- Stock cooler
- Wraith Prism
- MSRP
- $499.00
The Ryzen 9 3900X pairs 12 cores with 64 MB of L3 cache on the TSMC N7 process. Compare the Ryzen 9 3900X against the full CPU lineup on the CPU comparison table, or build a compatible system around it with the PC Builder.
How the Ryzen 9 3900X compares
Similar CPUs worth a look, based on live prices and 1080p gaming performance. Open any head-to-head for the full specs, benchmark and price breakdown.
Matches or beats the Ryzen 9 3900X in 1080p gaming and 13% cheaper ($26.00) — a clear win.
6-core · from $173.00
Ryzen 9 3900X vs Ryzen 5 9600XAbout 14% more 1080p gaming performance, for 20% more ($38.99).
4-core · from $237.99
Ryzen 9 3900X vs Core i3-12100Affiliate disclosure: Some links on this page are affiliate links — MaxMyBuild may earn a commission at no extra cost to you if you buy through them. As an Amazon Associate, MaxMyBuild earns from qualifying purchases. For Amazon, current price and availability are shown on the Amazon product page; product prices and availability are accurate as of the date and time of purchase and are subject to change. Prices shown for other retailers are approximate and may differ at checkout. “Search” links are non-affiliate and provided for convenience only.