GeForce RTX 4090 48GB (modded): 48GB VRAM — What Local LLMs Can It Run?
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The GeForce RTX 4090 48GB (modded) has 48GB of GDDR6X memory with 1,008 GB/s of bandwidth. No used-price data yet. At Q4 quantization it runs models up to 70B parameters at roughly 17 tokens/s.
Full GeForce RTX 4090 48GB (modded) specifications
What LLMs can the GeForce RTX 4090 48GB (modded) run?
One reference model per family (its main version)| Model | Q4_K_M | Q8_0 | FP16 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Fits | Speed t/s | Context | Fits | Speed t/s | Context | Fits | Speed t/s | Context | |
| DeepSeekDeepSeek R1 Qwen3 8B | ✓ | 121.8 | 128K | ✓ | 71.9 | 128K | ✓ | 40.3 | 128K |
| GemmaGemma 4 31B | ✓ | 31.9 | 8K | ✓ | 18.8 | 8K | ✗ | — | — |
| GLMGLM 4.7 Flash | ✓ | 148.9 | 128K | ✓ | 113.6 | 128K | Offload | 12.3 | — |
| gpt-ossgpt-oss 20B | ✓ | 139.4 | 128K | ✓ | 103.4 | 128K | ✓ | 69.1 | 128K |
| KimiKimi Linear 48B A3B | ✓ | 154.6 | 128K | Offload | 26 | — | Offload | 14.5 | — |
| LlamaLlama 3.1 8B | ✓ | 125.1 | 128K | ✓ | 73.7 | 128K | ✓ | 41.2 | 128K |
| MistralMistral 7B v0.3 | ✓ | 135.8 | 32K | ✓ | 80.6 | 32K | ✓ | 45.3 | 32K |
| QwenQwen3 8B | ✓ | 121.8 | 32K | ✓ | 71.9 | 32K | ✓ | 40.3 | 32K |
Fits when weights + KV cache + runtime overhead is at or below usable memory, single card. "Offload" on MoE models means it runs with expert weights in system RAM (only attention layers and KV cache stay in VRAM); that speed assumes 70 GB/s RAM bandwidth. The context column is the largest tier that fits.
GeForce RTX 4090 48GB (modded) used price history
Not enough history to draw a chart yet — price tracking just started.
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FAQ
How much VRAM does the GeForce RTX 4090 48GB (modded) have?
The GeForce RTX 4090 48GB (modded) has 48GB of GDDR6X memory with 1,008 GB/s of bandwidth.
Can the GeForce RTX 4090 48GB (modded) run a 70B model?
Yes. At Q4_K_M with an 8K context a 70B dense model needs about 43GB, which fits in the GeForce RTX 4090 48GB (modded)'s 48GB.
How much does a used GeForce RTX 4090 48GB (modded) cost?
No used-price data yet; it will appear here once the feed is live.