AMD Ryzen™ 9 3950X - Extreme Performance for Gamers, Creators & Streamers!

AMD Ryzen Logo The AMD Ryzen 9 3950X from AMD’s Matisse family of processors comes with 16 CPU cores based on the "Zen 2" architecture. After "Zen" and "Zen+", we come to the third generation of Zen microarchitecture which uses AMD’s advanced 7 Nanometer process in addition to offering impressive increases in clock frequency and sought-after features. When paired with an AMD X570 chipset, the Ryzen 9 3950X supports the PCI-Express 4.0 standard, which is twice as fast as its predecessors. All Ryzen 3000-series processors use the well-established AM4 platform, and these retain extensive backwards compatibility with older chipsetsund.

The AMD Ryzen 9 3950X at a Glance:

AMD Ryzen 9

  • 16 "Zen 2" Cores with a 105 Watt Thermal Design Power (TDP)
  • 32 Threads thanks to Simultaneous Multithreading (SMT)
  • Very high single- and multi-threaded performance
  • Base Clock of 3.5 GHz & 4.7 GHz Turbo with Precision Boost 2
  • Ultra-fast PCI-Express 4.0 interface (only with AMD X570)
  • Auto-overclocking with Precision Boost Overdrive (only with AMD X570)
  • Unlocked multiplier for manual overclocking (unlocked CPU)
  • Larger memory cache: 8 MB L2 & 64 MB L3
  • Highly efficient, non-planar 7 Nanometer FinFET transistors
  • AVX2 Instruction Set Extensions for complex vector calculations
  • Two AES Units for fast, reliable data encryption
  • Compatible with the AMD AM4 processor socket
  • Native support for DDR4-RAM rated for 3200 MHz (Dual-Channel)
  • Boxed version without CPU cooler!

The AMD Ryzen 9 3950X 16-Core CPU with 4.7 GHz Precision Boost 2

AMD Ryzen 7 Box The AMD Ryzen 9 3950X possesses 16 physical CPU cores which, thanks to Simultaneous Multithreading (SMT), are each capable of processing two threads simultaneously, meaning that the total number of cores available for use can be doubled to make for a total of 32. The 16 core flagship model functions at a high clock frequency of 3.5 GHz per core, with Precision Boost 2 allowing the processor to adjust to the use case scenario in real-time while remaining within the 105 Watt Thermal Design Power (TDP) at up to a Turbo of 4.7 GHz.

The silicon of the CPU cores uses the advanced 7nm FinFET process complete with stacked transistors (also known as 3D transistors) lithographed with Extreme Ultraviolet technology (EUV). The space on the processor that is gained by the node shrink allows the integration of a total of 8 MB level 2 cache and a full 64 MB level 3 Cache, both of which are particularly important for games. The I/O chiplet in the CPU package, which is responsible for the data lines, is produced using 12nm FinFET manufacturing and provides 24 PCIe lanes, four of which are reserved for the connection to the motherboard chipset and for connecting NVMe SSDs. This leaves 16 lanes for communication with graphics cards, while additional PCIe lanes are provided for additional storage devices, expansion cards and peripherals depending on the motherboard chipset.

PCI-Express 4.0 with the AMD X570 Chipset

AMD Ryzen 7 Box In combination with an AMD X570-based high-end chipset, the AMD Ryzen 9 3950X supports PCI-Express 4.0. PCIe 4.0 retains backwards compatibility with all kinds of expansion cards from earlier generations however. Data transfer speeds on a per-lane basis are doubled in PCIe 4.0 when compared to the older PCIe 3.0 standard, meaning that an NVMe SSD drive connected via PCIe 4.0 lanes will be capable of theoretical Read/Write speeds of up to 7.8 GB/s.

The AM4 platform also brings with it newer connectors such as USB 3.1 Gen 2 complete with Type-A- and/or Type-C connectors and high data transfer rates of up to 10 Gbit/s. The integrated memory controller on the CPU will support fast and energy-efficient DDR4-RAM operating in Dual-Channel Mode with or without ECC error correction at a native frequency of 3200 MHz, although significantly higher speeds will also be achievable via overclocking.

Automatic Overclocking via Precision Boost Overdrive

Precision Boost Overdrive Overclocking on AMD Zen 2 is a breeze, thanks to the fact that the CPU takes full control of the process itself: The AMD Ryzen 9 3950X is equipped with auto-OC features like Precision Boost Overdrive, which increases the frequency by up to 200 MHz over and above the max factory default boost clocks, in so far as an AMD X570 motherboard is used and sufficient cooling is provided.

High-end motherboards with the AMD X570 chipset provides, as a rule, a greater number of VRMs, meaning that the Ryzen 9-series processor enjoys a smooth and stable supply of power, meaning that the full previously untapped reserves on motherboards can be utilised. The processor uses temperature measurements to maintain independent control over its clock frequencies.

Unlocked CPU: Manual Overclocking Thanks to an Unlocked Multiplier

Furthermore, all AMD Ryzen CPUs come "unlocked" by default and – as was the case in the "Black Editions" and "K" variants of days gone by – overclockers will enjoy having full control over the clock frequencies in the BIOS or UEFI as well (e.g. via AMD Ryzen Master), although this requires both an OC-capable motherboards such as the AMD X570 and being paired with additional cooling.

Notes: For PCI-Express 4.0 and Precision Boost Overdrive to function, an AM4 motherboard utilising the AMD X570 chipset is necessary. Older 300- and 400-series chipsets will require a BIOS/UEFI update to operate this processor.

Technical Details:

  • Type:
    AMD Ryzen 9 3950X
    Zen 2 / Matisse
    Node: 7 nm FinFET (CPU), 12 nm LP (I/O-Chiplet)
  • CPU Cores: 16 / 32 (physical / virtual)
  • CPU Frequency:
    Base Clock: 3.5 GHz
    Boost Clock: max. 4.7 GHz (Precision Boost 2)
    Precision Boost Overdrive: +200 MHz Auto-OC (only with AMD X570 chipset)
  • Level 2 Cache: 8 MB (16x 512 kB)
  • Level 3 Cache: 64 MB (4x 16 MB)
  • Chipset Interface: PCI-Express 4.0 (only with AMD X570 chipset)
  • Integrated PCI-Express Lanes: x24 (x16 for GPU + x4 for SSD + x4 for chipset)
  • Memory:
    Memory Controller: Internal
    Memory Channels: 2
    Memory Standard: DDR4 (ECC & non-ECC)
    Native memory frequency: 3200 MHz (without OC)
  • TDP: 105 Watt
  • Socket Compatibility: AM4
  • Features & Instruction Set Extensions:
    PCI-Express 4.0 (only with AMD X570 chipset)
    Precision Boost 2 (Precision Boost Overdrive with AMD X570)
    SMT (Simultaneous Multithreading)
    X86-64 (64-Bit-Prozessor AMD64)
    AMD-V (Compute Virtualisation)
    VT-Vi (I/O MMU Virtualisation)
    2x AES Units (encryption)
    AVX & AVX2 (Advanced Vector Extensions)
    NX-Bit (Virus Protection) & EVP (Expanded Virus Protection)
    Turbo Core 3.0
    Unlocked Multipler

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