AMD Radeon RX 7900 XT
AMD Radeon RX 7900 XT
The RX 7900 XT sits between the 7800 XT and 7900 XTX in AMD's RDNA 3 lineup, offering 20 GB of GDDR6 memory at 800 GB/s for around $700. It's one of the best VRAM-per-dollar GPUs on the market - more VRAM than an RTX 4090 for roughly half the price. The tradeoff is slightly lower ROCm performance and narrower 320-bit bus vs the XTX's 384-bit.
Quick verdict
The 7900 XT offers exceptional VRAM value. 20 GB for $700 is perfect for Qwen3-30B at Q5_K_M or Mistral Small 3 at Q8_0. For Linux users comfortable with ROCm, it's arguably better value than any NVIDIA card at this price.
Spec breakdown
- VRAM: 20 GB GDDR6
- Memory bandwidth: 800 GB/s (20 Gbps, 320-bit bus)
- TDP: 315 W
- Stream processors: 5,376
- AI accelerators: 168 (RDNA 3)
Real-world AI inference
| Model | Tokens/sec | Source |
|---|---|---|
| Qwen3-30B Q4_K_M | ~13 tok/s | ROCm community |
| Mistral Small 3 Q5_K_M | ~28 tok/s | Community |
| Llama 3.3 70B Q3_K_M | ~6 tok/s | ROCm offload |
Honest alternatives
- RX 7900 XTX (~$850): 4 GB more VRAM, $150 more
- RTX 4070 Ti Super (~$750): 16 GB, NVIDIA software advantage
- Used RTX 3090 (~$700): 24 GB, similar performance
Frequently asked
Quick answers to common questions
How much VRAM does the AMD Radeon RX 7900 XT have?
The AMD Radeon RX 7900 XT has 20 GB of VRAM with 800 GB/s memory bandwidth. MSRP was $899.
What local AI models can run on the AMD Radeon RX 7900 XT?
The AMD Radeon RX 7900 XT with 20 GB VRAM can run many models depending on quantization. Models up to ~30B params may fit at Q4_K_M. Use our VRAM calculator to check specific models.
Is the AMD Radeon RX 7900 XT good for local AI inference?
AMD Radeon RX 7900 XT is best for llm-inference, gaming, content-creation. With ample VRAM it handles most open models well.
Where can I buy the AMD Radeon RX 7900 XT?
Check our buy links above for the best current prices on Amazon, Newegg, and B&H. Prices vary by retailer and availability.
How does the AMD Radeon RX 7900 XT compare to other GPUs?
AMD Radeon RX 7900 XT has 20 GB VRAM and 800 GB/s bandwidth. It is a mid-to-high-range card capable of running most 7B–30B models. Browse our hardware directory for side-by-side comparisons.
Is the AMD Radeon RX 7900 XT worth buying right now?
The current price is $699 vs the MSRP of $899. The price has dropped below MSRP, making it a good time to buy.
What power supply do I need for the AMD Radeon RX 7900 XT?
The AMD Radeon RX 7900 XT has a TDP of 315W. This requires a high-wattage PSU (850W+ recommended). Always check the manufacturer's recommendations for your specific build.
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