NVIDIA
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 RTX A4500 offers 20 GB of ECC GDDR6 at 640 GB/s bandwidth in NVIDIA's Ampere professional lineup, filling the gap between the 16 GB A4000 and 24 GB A5000. Its 20 GB capacity is unusual and particularly useful for models that exceed 16 GB at FP16 but do not need a full 24 GB. At $2,000 MSRP it is priced as a professional middle tier, suited for teams running 13B–20B models at FP16 or 30B models with light quantization in certified workstation environments.
Beyond LLMs
What AI tasks this GPU can handle — from text generation to image and video creation.
| Capability | Status | Representative Model |
|---|---|---|
| LLM Chat (7B) | Runs natively | Llama 3.1 8B Q4 |
| LLM Coding (30B) | Needs offload | Qwen 3 30B Q4 |
| LLM Large (70B) | Won’t fit | Llama 3.1 70B Q4 |
| Image Gen (SDXL) | Runs natively | SDXL 1.0 FP16 |
| Image Gen (Flux) | Very constrained | Flux.1 Dev FP16 |
| Image Gen (SD 3.5) | Tight fit | SD 3.5 Large FP16 |
| Video Short (25f) | Runs natively | LTX Video 2B |
| Video Long (100f) | Won't fit | Wan Video 14B |
Architecture
Ampere is NVIDIA's second-generation RTX architecture, built on Samsung's 8nm process. It introduced 3rd-generation Tensor Cores with support for sparsity-accelerated INT8 operations and improved FP16 throughput over Turing.
AI Relevance
Sparsity-aware Tensor Cores can effectively double throughput for structured sparse workloads. However, the lack of FP8 support means quantized inference is less efficient than Ada Lovelace or Blackwell.
购买建议
适合本地 AI
可处理 50 个顶级模型中的 21 个。中小型模型运行流畅。
20.0 GB
VRAM
$2,000
建议零售价
$100/GB
每 GB VRAM 成本
最适合此 GPU 的模型
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 17 additional models that do not fit on the current setup.
想要更多余量？ MacBook Pro M1 Max 32GB (32.0 GB unified memory) 是下一步升级选择。
Chat
SThis model is a direct match for chat. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, ollama, lm-studio.
Coding
SThis model is a direct match for coding. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, ollama, lm-studio.
Agentic Coding
SThis model is still usable for agentic-coding, but it is not the most specialized pick. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, ollama, lm-studio.
Reasoning
SThis model is a direct match for reasoning. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, ollama, lm-studio.
RAG
AThis model is a direct match for rag. It sits in the middle of the current model mix. It fits natively with comfortable headroom. Known channels: huggingface, ollama.
Qwen 3 14B
Phi-4-reasoning-plus 14BQwen 3.5 9BQwen 3 8B
GPT-OSS 20B
Magistral Small 2507Devstral Small 2 24B InstructQwen 3.6 27BMinistral 3 14BDevstral Small 1.1Qwen 3.5 4BNemotron Nano 8BQwen3-Coder 30B A3B InstructPhi-4 Mini Reasoning 4BQwen3-VL 30B A3B InstructQwen 3 30B A3BQwen 3.5 27B
Jina Embeddings v3
Gemma 4 26B A4B
BGE M3Nemotron 3 Nano 30BQwen 3.5 397B A17BDevstral 2 123B Instruct
Kimi K2.5Kimi K2.6
DeepSeek V4 ProQwen 3.5 122B A10BQwen 3.6 35B A3BDeepSeek V4 FlashQwen 3.5 35B A3BQwen 3 32BMistral Small 4 119B
Command A 111BQwen 2.5 VL 72BGPT-OSS 120BQwen3-Coder-Next
GLM-5.1Pixtral Large 124BGLM-5DeepSeek V3.2Qwen 3 235B A22BQwen3-Coder 480B A35B InstructNemotron Cascade 2 30B A3BGemma 4 31BLeanstral 119B A6BDeepSeek Coder V2 236BDeepSeek R1 671BDeepSeek V3.1 671B
EXAONE 4.0 32B触手可及
高质量模型，只需稍多一点内存
Image & Video Generation
39 of 52 models can generate images or video on your RTX A4500 20GB
| Model | Max Resolution | Gen Time | Grade |
|---|---|---|---|
| SD TurboImage | 512×512 | 800ms | S |
| Stable Diffusion 1.5Image | 512×768 | ~1.7s | S |
| Realistic Vision v5.1Image | 512×768 | ~1.7s | S |
| DreamShaper 8Image | 512×768 | ~1.7s | S |
| LCM DreamShaper v7Image | 512×768 | 500ms | S |
| PixArt-SigmaImage | 1024×1024 | ~6.8s | S |
| FramePack I2VVideo | 256×256 | ~12.5s/frame | S |
| SDXL TurboImage | 512×512 | 800ms | S |
| SDXL LightningImage | 1024×1024 | ~2.5s | S |
| Stable Diffusion XL 1.0Image | 1024×1024 | ~6.8s | S |
| Playground v2.5Image | 1024×1024 | ~10.2s | S |
| RealVisXL v5.0Image | 1024×1024 | ~7.6s | S |
| DreamShaper XLImage | 1024×1024 | ~7.6s | S |
| Juggernaut XL v9Image | 1024×1024 | ~7.6s | S |
| Animagine XL 3.1Image | 1024×1024 | ~7.6s | S |
| Pony Diffusion V6 XLImage | 1024×1024 | ~7.6s | S |
| Animagine XL 4.0Image | 1024×1024 | ~7.6s | S |
| Illustrious XLImage | 1024×1024 | ~7.6s | S |
| Wan Video 2.1 1.3BVideo | 256×256 | ~5s/frame | S |
| Stable Diffusion 3.5 MediumImage | 1024×1024 | ~11.9s | S |
| Flux.2 Klein 4BImage | 1024×1024 | ~2s | S |
| LTX Video 2BVideo | 512×512 | ~17.7s/frame | S |
| KolorsImage | 1024×1024 | ~13.6s | S |
| Stable CascadeImage | 1024×1024 | ~17s | S |
| AuraFlow v0.3Image | 1536×1536 | ~30.6s | A |
| Stable Diffusion 3.5 LargeImage | 1024×1024 | ~37.4s | A |
| Stable Diffusion 3.5 Large TurboImage | 1024×1024 | ~6.8s | A |
| CogVideoX 2BVideo | 256×256 | ~17.7s/frame | B |
| HunyuanVideoVideo | 256×256 | ~12.5s/frame | B |
| ChromaImage | 256×256 | ~6.8s | B |
| Z-Image TurboImage | 256×256 | ~14s | B |
| Flux.1 DevImage | 256×256 | ~30.6s | D |
| Flux.1 SchnellImage | 256×256 | ~5.9s | D |
| LTX Video 13BVideo | 256×256 | ~12.5s/frame | D |
| Flux.1 Kontext DevImage | 256×256 | ~34s | D |
| AnimateDiff v1.5.3Video | 512×768 | ~3.1s/frame | D |
| Cosmos Diffusion 7BVideo | 256×256 | ~18.8s/frame | D |
| CogVideoX 5BVideo | 256×256 | ~17.9s/frame | D |
| Wan2.2 TI2V 5BVideo | 256×256 | ~17.9s/frame | D |
| Flux.2 Klein 9BImage | 256×256 | ~3.4s | F |
| Flux.1 Fill DevImage | 256×256 | ~28.9s | F |
| Mochi 1 PreviewVideo | 256×256 | ~11.2s/frame | F |
| HunyuanVideo 1.5Video | 256×256 | ~10.4s/frame | F |
| Helios 14BVideo | 256×256 | ~12.9s/frame | F |
| SkyReels V2 14BVideo | 256×256 | ~12.9s/frame | F |
| Wan Video 2.1 14BVideo | 256×256 | ~12.9s/frame | F |
| Wan Video 2.2 14BVideo | 256×256 | ~12.9s/frame | F |
| Qwen ImageImage | 256×256 | ~11.4s | F |
| Qwen Image EditImage | 256×256 | ~11.4s | F |
| Flux.2 DevImage | 256×256 | ~5m 22s | F |
| MAGI-1Video | 256×256 | ~16s/frame | F |
| HunyuanImage 3.0Image | 256×256 | ~20.2s | 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.
Upgrade paths
See what you unlock with more powerful hardware
升级选项
Unlocks 17 additional models that do not fit on the current setup.
~$2,499 MSRP
Intel Arc Pro B60 24GB最佳性价比Unlocks 22 additional models that do not fit on the current setup.
~$599 MSRP
RTX 3090 Ti 24GBNVIDIA 升级Unlocks 22 additional models that do not fit on the current setup.
~$1,999 MSRP
Unlocks 67 additional models that do not fit on the current setup.
Lifts average decode speed across fitting models by about 135%.
~$8,000 MSRP
RTX A4500 20GB (20 GB VRAM) can run these top models: Qwen 3 14B (score: 96/100), Phi-4-reasoning-plus 14B (score: 95/100), Qwen 3.5 9B (score: 95/100). See the full compatibility list above.
RTX A4500 20GB has 20 GB of VRAM available for AI model inference. This determines which models and quantization levels you can run locally.
Yes, RTX A4500 20GB is excellent for running LLMs locally with top compatibility scores above 80/100.
For coding on RTX A4500 20GB, we recommend Qwen 3.5 9B. It achieves 97.7 tokens per second with 85K context window. This model is a direct match for coding. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, ollama, lm-studio.
There are 4 upgrade path(s) from RTX A4500 20GB: MacBook Pro M1 Max 32GB, Intel Arc Pro B60 24GB. Upgrading would unlock larger models and faster inference speeds.
RTX A4500 20GB can run Flux.1 Dev with sequential offloading or at a lower precision (FP8/NF4). The Schnell variant is faster and fits more easily. For best results, use ComfyUI with model offloading enabled.
RTX A4500 20GB (20 GB VRAM) can handle various AI generation tasks beyond LLMs. For image generation, SDXL and Stable Diffusion 3.5 run well. For video, LTX Video 2.3 can generate short clips. Check the AI Capability Matrix above for detailed compatibility.
RTX A4500 20GB is good for AI image generation. It handles SDXL and SD 3.5 well, and can run Flux with some optimization. 20 GB of usable memory is sufficient for most image generation workflows at standard resolutions.
Qwen 3.5 27B needs ~16.5 GB at Q4_K_M, which is tight for RTX A4500 20GB with 20 GB. You can run the 9B variant at Q8 (9.6 GB) for excellent quality, or try the 35B-A3B MoE variant at Q4 if it fits your context needs.
With 20 GB on RTX A4500 20GB, use Q8_0 for 8B models (best quality), Q4_K_M for 14B models (good balance), and Q4_K_M with limited context for larger models. Avoid going below Q4 — quality drops sharply at Q2-Q3.
RTX A4500 20GB has enough memory for many local LLMs, but bandwidth still matters a lot for real speed. Once a model fits, a faster-memory GPU can feel significantly better than a slower setup with similar capacity.
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