Dual-GPU AI workstation for 70B models
ArsenalPC MES2X Dual RTX 5090 AI Workstation
ArsenalPC · Verified 2026-07-23
From $11,999
Dual RTX 5090 with 64GB combined VRAM and 256GB RAM. Best-value dual-GPU AI workstation for 70B-class models.
Main limitation: No NVLink; high power draw; liquid cooling maintenance
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Key Specifications
| Specification | Value |
|---|---|
| Form Factor | Mid-tower |
| GPU | NVIDIA GeForce RTX 5090 |
| GPU Count | 2 |
| VRAM per GPU | 32 |
| Total Accelerator Memory | 64 |
| Memory Architecture | dedicated VRAM (GDDR7) |
| GPU Memory Type | GDDR7 |
| System RAM | 256 |
| RAM Type | DDR5 |
| CPU | AMD Ryzen 9 9950X3D |
| CPU Cores | 16 |
| Primary Storage | 8192 |
| Storage Type | NVMe SSD (2x4TB RAID) |
| NVLink Support | No |
| Power Supply | 1600 |
| Cooling | liquid cooling |
| OS | Windows 11 Pro |
| Linux Support | Yes |
| Windows Support | Yes |
| WSL Support | Yes |
| CUDA Support | Yes |
| Metal Support | No |
| Warranty | 3 |
| Onsite Support | No |
| Release Year | 2025 |
What Models Can It Run?
Calculated estimates using weight-only memory analysis at Q4 (4-bit) quantization. Actual requirements vary by framework, context length, and runtime overhead. See methodology.
| Model | Params | Required VRAM (Q4) | Fits in 64GB? |
|---|---|---|---|
| Llama 3.1 8B | 8B | 5.52 GB | ✓ Yes |
| Llama 3.1 70B | 70B | 37.14 GB | ✓ Yes |
| Llama 3.2 1B | 1B | 2 GB | ✓ Yes |
| Llama 3.2 3B | 3B | 3.01 GB | ✓ Yes |
| Qwen 2.5 7B | 7B | 5.01 GB | ✓ Yes |
| Qwen 2.5 14B | 14B | 8.53 GB | ✓ Yes |
| Qwen 2.5 32B | 32B | 18.06 GB | ✓ Yes |
| Qwen 2.5 72B | 72B | 38.14 GB | ✓ Yes |
| Mistral 7B | 7B | 5.01 GB | ✓ Yes |
| Mixtral 8x7B | 46.7B | 25.44 GB | ✓ Yes |
| DeepSeek R1 7B | 7B | 5.01 GB | ✓ Yes |
| DeepSeek R1 32B | 32B | 18.06 GB | ✓ Yes |
| DeepSeek R1 70B | 70B | 37.14 GB | ✓ Yes |
| Phi-3 Medium 14B | 14B | 8.53 GB | ✓ Yes |
| Gemma 2 9B | 9B | 6.02 GB | ✓ Yes |
| Gemma 2 27B | 27B | 15.05 GB | ✓ Yes |
| Stable Diffusion XL | 6.6B | 4.81 GB | ✓ Yes |
| Flux.1 Dev | 12B | 7.52 GB | ✓ Yes |
| Flux.1 Schnell | 12B | 7.52 GB | ✓ Yes |
Max model size: 70B class models (~121B params at Q4). These are calculated estimates, not measured results.
Pros & Cons
Pros
- ✓ Good accelerator memory (64GB)
- ✓ Linux support
- ✓ Windows support
- ✓ 3-year warranty
Cons
- ✗ No NVLink support (multi-GPU limited to PCIe P2P)
- ✗ No NVLink; high power draw; liquid cooling maintenance
Compare with Other Workstations
Apple Mac Studio M2 Ultra (192GB)
Apple Mac Studio M2 Ultra (64GB)
BIZON G3000 G2 (1x RTX 5090)
BIZON G3000 G2 (4x RTX 5090)
BOXX APEXX 8R (1x RTX PRO 6000 Blackwell)
Custom Dual RTX 4090 Training Workstation
Custom RTX 5090 AI Workstation (Value Build)
Dell Precision 7960 Tower (1x RTX 6000 Ada)
Sources & Verification
Primary source: ArsenalPC MES2X Product Page
Verification date: 2026-07-23
Data quality: Vendor specification — from manufacturer datasheet. No hands-on testing was performed.