Compute platform
AMD Ryzen 7 7700
ASRock B650E PG Riptide WiFi
96 GB system RAM
Performancemixeddesktop
Used RTX 3090 24 GB tower
High bandwidth and 24 GB VRAM make a used 3090 a strong price/performance step for 24–32B Q4 models at moderate context.
Complete system estimate
Price band$1,450–$1,900Checked 2026-08-18
Accelerator memory24 GB1× NVIDIA GeForce RTX 3090 24 GB
Typical / peak410 / 570 W
Circuit15 AUS electrical assumption
Compatibility-checked bill of materials
| Category | Part | Qty | Estimate | Source record |
|---|---|---|---|---|
| accelerator | Used RTX 3090 24 GB | 1 | $780 | nvidia-geforce-compare used-market-observation |
| cpu | AMD Ryzen 7 7700 | 1 | $250 | amd-cpu-specs |
| motherboard | ASRock B650E PG Riptide WiFi | 1 | $190 | asrock-motherboards |
| memory | 96 GB DDR5 (2x48 GB) | 1 | $240 | asrock-motherboards |
| storage | 2 TB PCIe 4.0 NVMe SSD | 1 | $110 | asrock-motherboards |
| psu | Corsair RM1000x 1000 W | 1 | $170 | corsair-psu |
| case | Fractal Meshify 2 | 1 | $135 | fractal-cases |
| cooling | Noctua NH-D15 | 1 | $110 | amd-cpu-specs |
| networking | Integrated 2.5 GbE and Wi-Fi 6E | 1 | $0 | asrock-motherboards |
Template checks: 1000 W PSU; 3/5 declared slots; 313 mm GPU against 467 mm clearance. Board-partner dimensions must still be confirmed before purchase.
What you are buying
Storage & network
2 TB storage
2.5 GbE + Wi-Fi 6E
Thermals
Fractal Meshify 2
Noctua NH-D15
Expected noise: moderate
Tradeoffs and upgrade path
- Used-card risk, 350 W heat, and no warranty certainty.
- Thirty-two-billion-parameter dense models lose long-context headroom at full GPU residency.
Upgrade path: Add system RAM for offload or move the GPU into a dual-slot Threadripper platform; mixing arbitrary cards is not supported by this template.
Provenance
NVIDIA GeForce GPU specifications
Durable memory, power, and architecture specifications; board-partner dimensions vary.
AMD Ryzen processor specifications
CPU platform and product-family source; exact street prices remain estimates.
ASRock motherboard product catalog
Compatibility reference for motherboard form factor and expansion slots.
Corsair power supplies
PSU capacity and connector-family reference.
Fractal Design cases
Chassis clearance and cooling-layout reference.
llama.cpp CUDA performance discussion
Community-submitted primary benchmark outputs; useful only as comparable evidence with environment caveats.
eBay sold-listing search for used workstation GPUs
Used-price bands are deliberately wide; condition, warranty, cooler, and seller history materially affect value.