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AMD
Operating mode
Use this to bias workload recommendations toward responsiveness, background autonomy, lighter serving, or multi-GPU scale-out.
Current mode
Balanced
Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.
The RX 6600 XT 8GB is an entry-level RDNA 2 card from AMD's 2021 lineup. Its 8 GB of GDDR6 VRAM is enough for 7B models at Q4 quantization, but it lacks official ROCm support — RDNA 2 is not on AMD's official ROCm support list. AI inference is possible via Vulkan-based backends in llama.cpp, but performance and compatibility are inconsistent compared to NVIDIA cards in the same price bracket.
Beyond LLMs
What AI tasks this GPU can handle — from text generation to image and video creation.
| Capability | Status | Representative Model | Detail |
|---|---|---|---|
| LLM Chat (7B) | Runs natively | Llama 3.1 8B Q4 | — |
| LLM Coding (30B) | Won’t fit | Qwen 3 30B Q4 | — |
| LLM Large (70B) |
Architecture
RDNA 2 is AMD's second-generation RDNA architecture, built on TSMC 7nm. It introduced hardware ray tracing and Infinity Cache for improved bandwidth efficiency. Powers the RX 6000 series and is also used in gaming consoles.
AI Relevance
Limited official ROCm support for consumer RDNA 2 cards — most AI runtimes require workarounds. Can run smaller models via llama.cpp with Vulkan or HIP backends, but performance is well behind NVIDIA equivalents.
Chat
SQwen 3.5 4B matches Chat and keeps a practical fit profile. It is a recent-generation family, which helps on current local SOTA workloads. It fits natively with comfortable headroom. Context coverage stays within the requested workload envelope. Known distribution channels: huggingface, ollama, lm-studio.
Coding
ACodestral Mamba 7B is a specialized fit for Coding. It sits in the middle of the current generation mix. It fits natively with comfortable headroom. Context coverage stays within the requested workload envelope. Known distribution channels: huggingface, ollama.
Agentic Coding
AJust out of reach
High-quality models that need a bit more memory
Image & Video Generation
21 of 52 models can generate images or video on your RX 6600 XT 8GB
| Model | Max Resolution | Gen Time | Grade |
|---|---|---|---|
| SD TurboImage | 512×512 | ~3s | S |
| Stable Diffusion 1.5Image | 512×768 | ~5.9s | S |
| Realistic Vision v5.1Image | 512×768 | ~5.9s | S |
| DreamShaper 8Image | 512×768 | ~5.9s | S |
| LCM DreamShaper v7 |
Upgrade paths
See what you unlock with more powerful hardware
Upgrade options
Unlocks 33 additional models that do not fit on the current setup.
Lifts average decode speed across fitting models by about 120%.
~$699 MSRP
Unlocks 37 additional models that do not fit on the current setup.
Lifts average decode speed across fitting models by about 60%.
~$449 MSRP
Unlocks 74 additional models that do not fit on the current setup.
~$329 MSRP
Unlocks 155 additional models that do not fit on the current setup.
Lifts average decode speed across fitting models by about 448%.
~$8,000 MSRP
Compare with similar
| Won’t fit |
| Llama 3.1 70B Q4 |
| — |
| Image Gen (SDXL) | Runs with sequential offload | SDXL 1.0 FP16 | ~~1m 3s per image |
| Image Gen (Flux) | Won't fit | Flux.1 Dev FP16 | ~~1m 47s per image |
| Image Gen (SD 3.5) | Won't fit | SD 3.5 Large FP16 | ~~2m 11s per image |
| Video Short (25f) | Won't fit | LTX Video 2B | ~~20.6s/frame |
| Video Long (100f) | Won't fit | Wan Video 14B | ~~1m 1s/frame |
Gemma 4 E2B is a specialized fit for Agentic Coding. It is a recent-generation family, which helps on current local SOTA workloads. It fits natively with comfortable headroom. Context coverage stays within the requested workload envelope. Known distribution channels: huggingface, ollama, lm-studio.
Reasoning
ACodestral Mamba 7B is viable for Reasoning, but is not the most specialized choice. It sits in the middle of the current generation mix. It fits natively with comfortable headroom. Context coverage stays within the requested workload envelope. Known distribution channels: huggingface, ollama.
RAG
AGranite 4.1 3B matches RAG and keeps a practical fit profile. It sits in the middle of the current generation mix. It fits natively with comfortable headroom. Context coverage stays within the requested workload envelope. Known distribution channels: huggingface, ollama.
| 512×768 |
| ~1.8s |
| S |
| PixArt-SigmaImage | 256×256 | ~23.7s | S |
| FramePack I2VVideo | 256×256 | ~43.6s/frame | A |
| SDXL TurboImage | 256×256 | ~7.9s | A |
| SDXL LightningImage | 256×256 | ~23.6s | B |
| Stable Diffusion XL 1.0Image | 256×256 | ~1m 3s | B |
| Playground v2.5Image | 256×256 | ~35.6s | B |
| RealVisXL v5.0Image | 256×256 | ~1m 11s | B |
| DreamShaper XLImage | 256×256 | ~1m 11s | B |
| Juggernaut XL v9Image | 256×256 | ~1m 11s | B |
| Animagine XL 3.1Image | 256×256 | ~1m 11s | B |
| Pony Diffusion V6 XLImage | 256×256 | ~1m 11s | B |
| Animagine XL 4.0Image | 256×256 | ~1m 11s | B |
| Illustrious XLImage | 256×256 | ~1m 11s | B |
| Wan Video 2.1 1.3BVideo | 256×256 | ~17.3s/frame | D |
| Stable Diffusion 3.5 MediumImage | 256×256 | ~41.5s | D |
| Flux.2 Klein 4BImage | 256×256 | ~7.1s | D |
| LTX Video 2BVideo | 256×256 | ~20.6s/frame | F |
| KolorsImage | 256×256 | ~47.5s | F |
| Stable CascadeImage | 256×256 | ~59.4s | F |
| AuraFlow v0.3Image | 256×256 | ~1m 47s | F |
| Stable Diffusion 3.5 LargeImage | 256×256 | ~2m 11s | F |
| Stable Diffusion 3.5 Large TurboImage | 256×256 | ~23.7s | F |
| CogVideoX 2BVideo | 256×256 | ~20.6s/frame | F |
| HunyuanVideoVideo | 256×256 | ~43.6s/frame | F |
| ChromaImage | 256×256 | ~23.7s | F |
| Z-Image TurboImage | 256×256 | ~24.5s | F |
| Flux.1 DevImage | 256×256 | ~1m 47s | F |
| Flux.1 SchnellImage | 256×256 | ~20.8s | F |
| LTX Video 13BVideo | 256×256 | ~43.6s/frame | F |
| Flux.1 Kontext DevImage | 256×256 | ~1m 59s | F |
| AnimateDiff v1.5.3Video | 512×768 | ~10.8s/frame | F |
| Cosmos Diffusion 7BVideo | 256×256 | ~34s/frame | F |
| CogVideoX 5BVideo | 256×256 | ~29.7s/frame | F |
| Wan2.2 TI2V 5BVideo | 256×256 | ~29.7s/frame | F |
| Flux.2 Klein 9BImage | 256×256 | ~11.9s | F |
| Flux.1 Fill DevImage | 256×256 | ~1m 41s | F |
| Mochi 1 PreviewVideo | 256×256 | ~39.2s/frame | F |
| HunyuanVideo 1.5Video | 256×256 | ~36.4s/frame | F |
| Helios 14BVideo | 256×256 | ~44.9s/frame | F |
| SkyReels V2 14BVideo | 256×256 | ~44.9s/frame | F |
| Wan Video 2.1 14BVideo | 256×256 | ~44.9s/frame | F |
| Wan Video 2.2 14BVideo | 256×256 | ~44.9s/frame | F |
| Qwen ImageImage | 256×256 | ~40s | F |
| Qwen Image EditImage | 256×256 | ~40s | F |
| Flux.2 DevImage | 256×256 | ~18m 43s | F |
| MAGI-1Video | 256×256 | ~55.7s/frame | F |
| HunyuanImage 3.0Image | 256×256 | ~1m 10s | F |
Image models estimated at 1024×1024 (28 steps, FP16). Video models estimated at 768×512 (25 frames, 30 steps, FP16). Actual performance varies with runtime and system load.
There are 4 upgrade path(s) from RX 6600 XT 8GB: RTX 3080 10GB, RX 7700 XT 12GB. Upgrading would unlock larger models and faster inference speeds.
Buying advice
Usable for local AI with limits
Can run 7 of 50 top models, mostly smaller ones. Larger models need heavy quantization or won't fit.
8.0 GB
VRAM
$379
MSRP
$47/GB
Cost per GB VRAM
Best models for this GPU
What will limit you first
This setup is broadly balanced for this model.
No major red flags
This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.
Best upgrade itinerary
Unlocks 33 additional models that do not fit on the current setup.
Want more headroom? RTX 3080 10GB (10.0 GB VRAM) is the next step up.
