Compute platform
AMD Ryzen Threadripper 7960X
ASUS Pro WS TRX50-SAGE WiFi
256 GB system RAM
Multi-agentmixeddesktop
Dual used RTX 3090 agent workstation
Two independent 24 GB GPUs are useful for concurrent agents or supported tensor parallelism, with enough PCIe lanes and spacing to avoid a consumer-board trap.
Complete system estimate
Price band$4,900–$5,800Checked 2026-08-18
Accelerator memory48 GB2× NVIDIA GeForce RTX 3090 24 GB
Typical / peak790 / 1050 W
Circuit20 AUS electrical assumption
Compatibility-checked bill of materials
| Category | Part | Qty | Estimate | Source record |
|---|---|---|---|---|
| accelerator | Used RTX 3090 24 GB blower or 3-slot | 2 | $3,120 | nvidia-geforce-compare used-market-observation |
| cpu | AMD Ryzen Threadripper 7960X | 1 | $1,100 | amd-threadripper-specs |
| motherboard | ASUS Pro WS TRX50-SAGE WiFi | 1 | $850 | asus-workstations |
| memory | 256 GB DDR5 ECC RDIMM | 1 | $650 | asus-workstations |
| storage | 4 TB PCIe 4.0 NVMe SSD | 1 | $240 | asus-workstations |
| psu | Corsair AX1600i 1600 W | 1 | $480 | corsair-psu |
| case | Fractal Define 7 XL | 1 | $220 | fractal-cases |
| cooling | Noctua NH-U14S TR5-SP6 | 1 | $130 | amd-threadripper-specs |
| networking | 10 GbE PCIe adapter | 1 | $100 | asus-workstations |
Template checks: 1600 W PSU; 6/7 declared slots; 313 mm GPU against 549 mm clearance. Board-partner dimensions must still be confirmed before purchase.
What you are buying
Storage & network
4 TB storage
10 GbE + Wi-Fi 7
Thermals
Fractal Define 7 XL
Noctua NH-U14S TR5-SP6
Expected noise: loud
Tradeoffs and upgrade path
- VRAM does not automatically pool; the runtime and model must support tensor parallelism.
- Used GPUs, high heat, noise, and a dedicated 20 A circuit are operational burdens.
Upgrade path: Replace both cards as a matched pair; the chassis, lanes, RAM, and PSU are already sized for two professional dual-slot GPUs.
Provenance
NVIDIA GeForce GPU specifications
Durable memory, power, and architecture specifications; board-partner dimensions vary.
AMD Ryzen Threadripper PRO processors
Primary platform source for high-lane-count multi-GPU workstation builds.
ASUS Pro WS workstation motherboards
Compatibility reference for multi-GPU workstation layouts.
Corsair power supplies
PSU capacity and connector-family reference.
Fractal Design cases
Chassis clearance and cooling-layout reference.
eBay sold-listing search for used workstation GPUs
Used-price bands are deliberately wide; condition, warranty, cooler, and seller history materially affect value.