Thelio Major (thelio-major-r5-n4)

The System76 Thelio Major is a desktop with the following specifications:

Processor options
- Supports AMD Threadripper 9000 series (Zen 5) and 7000 series (Zen 4) CPUs
Motherboard
- Gigabyte TRX50 Aero D running System76 Firmware (non-open)
- AMD TRX50 Chipset
Daughterboard
- Thelio Io board running open-source firmware
  - Version 2.3
Graphics options
- Configured with up to one dedicated GPU
  - User-expandable to 2 GPUs
  - Primary GPU slot:
    - PCIe 5.0 x16
    - 3-slot height
      - 4+-slot cards fit if PCIe slot 2 is empty
  - Secondary GPU slot:
    - PCIe 5.0 x16
    - 2-slot height
      - 3-slot cards fit if PCIe slot 3 is empty
- GPU size:
  - Internal clearance: 358.00mm
  - Recommended maximum length: 348.00mm
- Tested with the following GPUs:
  - NVIDIA RTX Pro 6000 Blackwell
    - 4x DisplayPort 2.1b
    - Requires 2x750W PSU configuration
  - NVIDIA RTX Pro 5000 Blackwell
    - 4x DisplayPort 2.1b
  - NVIDIA RTX Pro 4500 Blackwell
    - 4x DisplayPort 2.1b
  - NVIDIA RTX Pro 4000 Blackwell
    - 4x DisplayPort 2.1b
  - NVIDIA RTX Pro 2000 Blackwell
    - 4x Mini DisplayPort 2.1b
  - NVIDIA RTX 6000 Ada
    - 4x DisplayPort 1.4a
  - NVIDIA RTX 5000 Ada
    - 4x DisplayPort 1.4a
  - NVIDIA RTX 4500 Ada
    - 4x DisplayPort 1.4a
  - NVIDIA RTX 4000 Ada
    - 4x DisplayPort 1.4a
  - NVIDIA GeForce RTX 5090
    - 3x DisplayPort 2.1b
    - 1x HDMI 2.1b
    - Requires 2x750W PSU configuration
  - NVIDIA GeForce RTX 5080
    - 3x DisplayPort 2.1b
    - 1x HDMI 2.1b
    - Requires 2x750W PSU configuration
  - NVIDIA GeForce RTX 4090
    - 3x DisplayPort 1.4a
    - 1x HDMI 2.1a
  - NVIDIA GeForce RTX 4080 Super
    - 3x DisplayPort 1.4a
    - 1x HDMI 2.1a
  - NVIDIA GeForce RTX 4070 Ti Super
    - 3x DisplayPort 1.4a
    - 1x HDMI 2.1a
  - NVIDIA RTX A400
    - 4x Mini DisplayPort 1.4a
  - AMD Radeon AI Pro R9700
    - 3x DisplayPort 2.1a
    - 1x HDMI 2.1b
  - AMD Radeon Pro W7900
    - 3x DisplayPort 2.1
    - 1x Mini DisplayPort 2.1
  - AMD Radeon RX 7600
    - 3x DisplayPort 2.1
    - 1x HDMI 2.1a
Expansion
- 2x PCIe 5.0 x16 (primary & secondary GPU slots)
- 1x PCIe 4.0 x16
Memory
- Up to 512GB (4x128GB) dual-channel DDR5 DIMMs @ 5600 MHz
- Tested with the following RAM modules (may ship with other tested modules):
  - Hynix HMCT04AGERA202N (128GB/stick)
  - Hynix HMCG94AGBRA181N (64GB/stick)
  - Hynix HMCG84AGBRA190N (32GB/stick)
  - Kingston KF556R28RBE2K4 (32GB/stick)
Networking
- 1x 10-Gigabit Ethernet (Marvell AQtion AQC113C)
- 1x 2.5-Gigabit Ethernet (Realtek RTL8125)
- Wireless (depending on ship date):
  - After November 2025: Wi-Fi 7 + Bluetooth 5.3 (Qualcomm QCNCM865)
  - Before November 2025: Wi-Fi 6E + Bluetooth 5.3 (Intel AX211)
Power
- C13 power cord
- PSU wattage options (depending on configuration):
  - 2x 750W PSUs
  - 1x 1000W PSU
- SFX form factor
- 80+ Gold Efficiency
- Tested with the following PSU models (may ship with other tested models):
  - 1000W:
    - Lian Li SP1000P (Black)
    - Thermaltake Toughpower Platinum (PS-STP-1000FNFAPU-1)
  - 750W:
    - Lian Li SP750G (Black)
Sound
- Back:
  - 3.5mm mic in
  - 3.5mm line out
  - Realtek ALC4080 audio chipset
- Front:
  - 3.5mm combo jack
  - Realtek ALC897 audio chipset
- Up to 2-channel audio output
- HDMI/DisplayPort audio (depending on GPU)
Storage
- 3x M.2 (PCIe NVMe Gen 5) SSDs
- 1x M.2 (PCIe NVMe Gen 4) SSD
- 4x 2.5” SATA III
USB
- Back ports:
  - 2x Thunderbolt 4
    - Top port supports DisplayPort over USB-C when using DisplayPort passthrough from dedicated GPU
    - Intel JHL8540 controller
  - 4x USB 3.2 Gen 2 (Type-A)
  - 4x USB 3.2 Gen 1 (Type-A)
- Front ports:
  - 1x USB 3.2 Gen 2 (Type-C)
  - 2x USB 3.2 Gen 1 (Type-A)
Dimensions
- 44.0cm × 25.4cm × 38.4cm