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Thelio Major

Thelio Major employs workstation-class components backed by quiet, effective cooling to finalize your compute-intensive projects ahead of schedule.

  • Marathon performance
  • AMD Threadripper CPUs
  • Single or Dual GPUs
  • Up to 256GB RAM
  • Up to 88TB storage
  • Swappable accent panel
Hero thumbnail background image
System76 Thelio Major with Walnut Accent
  • Marathon performance
  • AMD Threadripper CPUs
  • Single or Dual GPUs
  • Up to 256GB RAM
  • Up to 88TB storage
  • Swappable accent panel
Desk setup with Thelio Major, external monitors, Launch keyboard, and a mouse.


Thelio Major is a high-end desktop (HEDT) designed with an all-star roster of components that breeze through intensive computing. We take this power even further by engineering the desktop to ensure it performs to its fullest potential.


Eager Processors

Productive HEDT CPUs like the AMD Threadripper 3960X want to see your project completed as quickly as possible. With up to 24 CPU cores and 48 threads, Thelio Major drastically reduces wait times when processing your final file—no matter how many “final” versions you end up making.

Countless Cores

The more GPU cores in your desktop, the faster your project can be visualized. Thelio Major offers full-core performance with up to two NVIDIA RTX A6000 GPUs so you can model, simulate, and animate your work in record time.

Compile and Render Fast

HEDT users benefit from faster processing and reliable ECC memory. If you’re frequently rendering visualizations or compiling long sequences of code, these advantages will greatly accelerate your project’s timeline.


Thelio Major is meticulously engineered to maximize performance and prevent throttling. Large-blade fans blow cool air up into the system. Meanwhile, copper pipes in the heat sink use phase-change cooling to move heat away from the CPU. Hot air is then expelled out the exhaust port. This bottom-up cooling system keeps your desktop running smoothly under high loads.


Optimized Ducted Cooling

After countless iterations testing fan placement, CPU duct size, exhaust port design, and other factors, we landed on the most optimal arrangement for effective cooling at low decibels.

Room for One More

Thelio Major leaves room for up to two large blower GPUs. Thanks to thermal engineering and a progressive fan curve, the heat generated by the graphics cards exhausts effectively without causing your system unnecessary stress.

Controlled Thermal Environment

Chassis-specific thermal engineering yields quiet and effective cooling in perfect balance. The Thelio IO board allows your operating system to monitor the temperature of your GPUs and adjust fan speeds for intensive computing. Large 140mm fans move air more effectively at a lower RPM, producing quieter acoustics. In short, Thelio Major is designed to prevent throttling and run efficiently at every level.


Thelio desktops are designed to provide easy access to your motherboard for upgrades and repairs. Slip in drives, add memory, and upgrade graphics cards at will with our open hardware design.


Side Panel Access

Unscrew the lid and access everything in the system. No obstructive wires, no loose parts.

Room (and Wires) for Upgrades

Any wires you’ll ever need are already provided inside the system. Thelio Major accommodates even the largest, most powerful GPUs on the market.

Easy Storage Expansion

The screw bay on the top bar houses enough screws to install the maximum number of 2.5” storage SSDs. Hot swappable drives slide in and out of the aluminum drive cage with ease.

Swappable accent colors

Let your alter ego shine with new swappable color accent panels on Thelio Major! Ponder with Neptune Blue, or use Martian Red to rise to the challenge. And when the day is done, new Farout Pink will help you blow off steam on Steam.



Create the best system to set yourself up for success. Customize Thelio Major to fit your needs with a wide variety of HEDT component options across the board.


  • AMD Threadripper 3 CPUs
  • ECC Memory for better data integrity
  • 1 GbE Ethernet
  • Up to 88TB of Storage
  • Fast Wi-Fi 6
  • AMD or NVIDIA graphics
  • PCIe Gen 4.0 Storage and Graphics support


New Low Price!


Rigid aluminum is cut, powder coated, and molded into a light, durable chassis. From the 3-Body Problem intake to the subtle mountainscape etch, Thelio Major adds elegance and character to your desk. Personalize it with natural or stained wood veneer options.

Detail of the machine exterior with the 3-Body Problem intake vent.
Detail of the machine exterior with intake vents at the bottom.
Storage drives inside the powder-coated aluminum cages.
Back view of the machine with ports, the UNIX Epoch exhaust vent.
Close view of the machine interior with GPUs.
Detail of the machine exterior showing the UNIX Epoch exhaust vent.

Add Ports with Launch Keyboard

  • Match your Thelio
  • Dual, high-speed USB-A and USB-C ports
  • Optimized for Pop!_OS
  • Fully configurable
  • Customizable colors and LEDs
  • Buy separately or add when configuring your Thelio
Launch Keyboard


What could you accomplish at peak efficiency? Develop a new software feature. Finalize your animated short film. Model the latest iteration of your IOT device.

Thelio Major pairs with Pop!_OS to keep you progressing at full speed, every step of the way. Auto-Tiling, Workspaces, and Keyboard Navigation accelerate your workflow with comprehensive shortcuts.

Front-facing 27 inches1440p IPS monitor displaying Pop!_OS.
Side view of the machine showing walnut accent component.
Walnut accentbirch accentred accentBlue accentpink accenttraces accent

Thelio Major


Tech Specs

Operating System

Pop!_OS 22.04 LTS or Ubuntu 22.04 LTS


AMD® 3rd Gen Ryzen™ Threadripper™ series


Up to 2× Graphics Cards

AMD® or NVIDIA® Graphics available

Video Ports

Dependent on GPU selection


Up to 256 GB Quad Channel ECC DDR4 @ 3200 MHz


Up to 88 TB, x3 M.2 NVMe and x8 2.5″ SATA drives

Rear Ports

5 x USB 3.2 Gen 2 Type-A (red), 4 x USB 2.0, 1 x USB 3.2 Gen 2 Type-C, 1 x RJ-45 LAN

Rear Audio

5 x Audio Jacks


Gigabit Ethernet w/ built-in Intel® Wireless-AC (a/b/g/n/ac/ax) with Bluetooth 5.0

Power Supply

1000W 80+ Certified (90% or greater power efficiency)


Height × Width × Depth

18.19″ × 10.32″ × 16.06″ (462 × 262 × 408mm)


thelio-major-r2 - Technical Documentation