The RTX 4080 Super 16GB is the fastest Ada Lovelace consumer GPU for local AI, offering 736 GB/s GDDR6X bandwidth with 52 TFLOPS FP16 and FP8 support. The 16 GB VRAM fits 13B at FP16 and 30B at Q4, and decode speed on those models is fast — 736 GB/s is close to the RTX 3090's bandwidth but with far better compute efficiency from Ada. It's expensive, and users needing more VRAM should look at the RTX 4090 (24GB). But if 16 GB is your ceiling, this is the fastest Ada card available.
Beyond LLMs
AI Capability Matrix
What AI tasks this GPU can handle — from text generation to image and video creation.
CUDA Compute Capability 8.9 (Ada Lovelace)4th Gen Tensor Cores with FP8 support736 GB/s memory bandwidth (GDDR6X)52 TFLOPS FP16 compute16 GB GDDR6X VRAMPCIe Gen 4 x16, 320W TDP
Für KI-Workloads
Stärken
736 GB/s bandwidth makes decode on 13B–30B Q4 models among the fastest in the 16 GB class
FP8 support and strong Ada efficiency deliver excellent tokens-per-watt
52 TFLOPS FP16 processes large prompts quickly
Most compute-capable 16 GB Ada consumer GPU
Hinweise
16 GB VRAM still caps you at 30B models — the RTX 4090 24GB offers significantly more headroom
320W TDP is on the high end for consumer GPUs
Premium price — the RTX 4070 Ti Super 16GB offers similar VRAM at significantly lower cost
RTX 5080 16GB (Blackwell, more bandwidth) is now available as a competitor
Architecture
Ada Lovelace
Ada Lovelace is NVIDIA's fourth-generation RTX architecture, manufactured on TSMC's custom 4N process. It introduces 4th-generation Tensor Cores with FP8 support, 3rd-generation ray tracing cores, and the Shader Execution Reordering (SER) engine for improved workload scheduling.
AI Relevance
FP8 Tensor Core operations provide a significant uplift for quantized LLM inference compared to Ampere's FP16-only Tensor Cores. DLSS 3 Frame Generation demonstrates the architecture's AI processing capabilities.
This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.
Best upgrade itinerary
Unlocks 2 additional models that do not fit on the current setup.
Mehr Spielraum gewünscht? MacBook Pro M3 24GB (24.0 GB unified memory) ist die nächste Stufe.
Cost vs cloud API
15.2× cheaper than Claude Sonnet / GPT-4o per token
Assumes 4 hours/day of active inference at 116 tok/s, RTX 4080 Super 16GB amortized over 36 months, US residential electricity ($0.15/kWh), blended cloud pricing at $10 per 1M tokens (GPT-4o / Claude Sonnet tier).
49.9M
Tokens/month at this pace
$32.8
Monthly local cost
$499
Same tokens on cloud API
$0.657
Local $/1M tokens
Break-even: pays for itself in 2.0 months vs cloud API at this workload. Price reference: $999 MSRP.
Qwen 3.5 9B 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.
Qwen 3.5 9B is a specialized fit for 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.
Qwen 3.5 9B 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.
Qwen 3.5 9B matches Reasoning 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.
Granite 4.1 8B 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.
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.
Multi-GPU scaling
RTX 4080 Super 16GB — Up to 2× via PCIe
Scale out with multiple GPUs for larger models. PCIe interconnect with 30% scaling overhead.
Config
Effective memory
Models that fit
Est. bandwidth
1× RTX
16 GB
283/374
736 GB/s
2× RTX
32 GB
325/374
1,030 GB/s
Model counts use default quantization at coding workload settings. Multi-GPU scaling factor: 0.7× per additional GPU.
RTX 4080 Super 16GB (16 GB VRAM) can run these top models: Qwen 3.5 9B (score: 97/100), Qwen 3 8B (score: 95/100), Qwen 3 14B (score: 94/100). See the full compatibility list above.
How much VRAM does RTX 4080 Super 16GB have for AI?
RTX 4080 Super 16GB has 16 GB of VRAM available for AI model inference. This determines which models and quantization levels you can run locally.
Is RTX 4080 Super 16GB good for running LLMs locally?
Yes, RTX 4080 Super 16GB is excellent for running LLMs locally with top compatibility scores above 80/100.
What is the best model for RTX 4080 Super 16GB for coding?
For coding on RTX 4080 Super 16GB, we recommend Qwen 3.5 9B. It achieves 119.6 tokens per second with 58K context window. Qwen 3.5 9B is a specialized fit for 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.
Should I upgrade from RTX 4080 Super 16GB?
There are 5 upgrade path(s) from RTX 4080 Super 16GB: RTX 4080 Super 16GB, MacBook Pro M3 24GB. Upgrading would unlock larger models and faster inference speeds.
Can RTX 4080 Super 16GB run Flux for image generation?
RTX 4080 Super 16GB 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.
What image and video AI models can I run on RTX 4080 Super 16GB?
RTX 4080 Super 16GB (16 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.
Is RTX 4080 Super 16GB good for AI image generation?
RTX 4080 Super 16GB is good for AI image generation. It handles SDXL and SD 3.5 well, and can run Flux with some optimization. 16 GB of usable memory is sufficient for most image generation workflows at standard resolutions.
Can RTX 4080 Super 16GB run Qwen 3.5 27B?
Qwen 3.5 27B needs ~16.5 GB at Q4_K_M, which is tight for RTX 4080 Super 16GB with 16 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.
What is the best quantization for AI models on RTX 4080 Super 16GB?
With 16 GB on RTX 4080 Super 16GB, 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.
For local LLMs on RTX 4080 Super 16GB, does VRAM matter more than bandwidth?
RTX 4080 Super 16GB 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.
How does multi-GPU scale for AI inference on RTX 4080 Super 16GB?
RTX 4080 Super 16GB supports up to 2× GPU scaling via PCIe. With 2× GPUs, you get 32 GB effective memory with a 0.7× scaling factor per GPU. This enables running models like Qwen3-Coder 30B A3B Instruct and Qwen 3.5 397B A17B that don't fit on a single card.
Is PCIe required for multi-GPU RTX 4080 Super 16GB inference?
RTX 4080 Super 16GB uses PCIe for multi-GPU communication, which has approximately 30% scaling overhead. For best multi-GPU performance, consider NVLink-equipped variants.
Do I need more PCIe lanes or a workstation motherboard for multi-GPU RTX 4080 Super 16GB builds?
Usually yes. If you want to run 2-4× RTX 4080 Super 16GB for local AI, the bottleneck often becomes the platform, not the card. Workstation and server boards give you more CPU PCIe lanes, better x16 slot wiring, more spacing between cards, stronger power delivery, and usually more RAM capacity. Consumer x8/x8 layouts can work, but they are a common weak point in multi-GPU builds.