NVIDIA · workstation

RTX A4500

RTX A4500 has 20 GB of VRAM at 640 GB/s — about 18.60 GiB usable after driver and compositor overhead. 1927 of 2118 indexed models fit at 32K context with q4_0 KV.

Spec sheet· bandwidth, theoreticalFrom the file· fit from summed bytesPredicted· speed
Memory
20 GB
GDDR6
Bandwidth
640 GB/s
320-bit bus
Tensor FP16
95 TF
dense
TDP
200 W
KV cachef16q8_0q4_0quantizing the KV cache is a ~2× lever on the dominant term at long context
text 1652vision language 171audio asr 39video 16image 2audio tts 21embedding 26

What fits at 32K context

largest quantization that fits, per model · 1927 of 2118 indexed
ModelBest quantParamsWeightsKVTotal in memoryHeadroomtok/s
Delphi-25B-SimpleRL-MathI1-Q2_K_S25.0B8.11 GiB9.41 GiB18.60 GiB0.00 GiB21±22%
Qwen3-VL-30B-A3B-ThinkingMoEQ4_K_S31.1B16.75 GiB0.84 GiB18.59 GiB0.01 GiB71±37%
MiroThinker-v1.0-30BMoEQ4_K_S30.5B16.75 GiB0.84 GiB18.59 GiB0.01 GiB71±37%
Qwen3-30B-A3BMoEQ4_K_S30.5B16.75 GiB0.84 GiB18.59 GiB0.01 GiB71±37%
Qwen3-30B-A3B-Instruct-2507MoEQ4_K_S30.5B16.75 GiB0.84 GiB18.59 GiB0.01 GiB71±37%
Qwen3-30B-A3B-Thinking-2507MoEQ4_K_S30.5B16.75 GiB0.84 GiB18.59 GiB0.01 GiB71±37%
Pantheon-Proto-RP-1.8-30B-A3BMoEQ4_K_S30.5B16.75 GiB0.84 GiB18.59 GiB0.01 GiB71±37%
granite-4.1-30bQ4_028.9B15.23 GiB2.25 GiB18.58 GiB0.02 GiB21±22%
Tongyi-DeepResearch-30B-A3BMoEQ4_K_S30.5B16.75 GiB0.84 GiB18.58 GiB0.02 GiB71±37%
Qwen3-48B-A4B-Savant-Commander-Distill-12X-Closed-Open-Heretic-UncensoredMoEI1-Q3_K_L33.6B16.30 GiB1.27 GiB18.57 GiB0.03 GiB43±37%
Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16UD-IQ3_S33.0B17.53 GiB0.00 GiB18.57 GiB0.03 GiB21±22%
OLMo-2-1124-13B-InstructQ6_K13.7B10.48 GiB7.03 GiB18.56 GiB0.04 GiB21±22%
G4-MeroMero-26B-A4B-it-uncensored-hereticMoEQ5_K_S25.8B17.14 GiB0.43 GiB18.56 GiB0.04 GiB21±22%
Skywork-R1V3-38BQ4_K_S38.4B17.49 GiB0.00 GiB18.56 GiB0.04 GiB21±22%
Qwen3.6-35B-A3B-uncensored-heretic-Native-MTP-PreservedMoEQ3_K_L35.1B17.37 GiB0.18 GiB18.55 GiB0.05 GiB114±37%
Qwen3.5-35B-A3B-uncensored-heretic-v2-Native-MTP-PreservedMoEQ3_K_L35.1B17.37 GiB0.18 GiB18.55 GiB0.05 GiB114±37%
Huihui-Qwen3.5-35B-A3B-abliteratedMoEI1-IQ4_XS36.0B17.37 GiB0.18 GiB18.55 GiB0.05 GiB114±37%
Qwen3.5-35B-A3B-BaseMoEI1-IQ4_XS36.0B17.37 GiB0.18 GiB18.55 GiB0.05 GiB114±37%
Qwen3.5-35B-A3B-Claude-4.6-Opus-Reasoning-DistilledMoEI1-IQ4_XS36.0B17.37 GiB0.18 GiB18.55 GiB0.05 GiB114±37%
GLM-4.7-FlashMoEQ4_K_M31.2B17.05 GiB0.46 GiB18.53 GiB0.07 GiB81±37%
EXAONE-4.5-33BI1-IQ4_XS34.4B16.63 GiB0.80 GiB18.53 GiB0.07 GiB21±22%
Trinity-MiniMoEQ5_K_M26.1B17.36 GiB0.17 GiB18.53 GiB0.07 GiB89±37%
Voxtral-Small-24B-2507Q5_K_L24.3B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Devstral-Small-2-24B-Instruct-2512Q5_K_L24.0B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Dolphin3.0-R1-Mistral-24BQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Dolphin3.0-Mistral-24BQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Cydonia_VistralQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Dans-PersonalityEngine-V1.2.0-24bQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Dans-PersonalityEngine-V1.3.0-24bQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Devstral-Small-2505Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Mistral-Small-3.2-24B-Instruct-2506Q5_K_L24.0B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
MS3.2-PaintedFantasy-v3-24BQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Precog-24B-v1Q5_K_L16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Magidonia-24B-v4.3Q5_K_L16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Magidonia-24B-v4.2.0Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
MS-2501-DPE-QwQify-v0.1-24BQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
sarvam-mQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Magistral-Small-2506Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Cydonia-24B-v4.1Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Cydonia-24B-v4Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Mistral-Small-3.1-24B-Instruct-2503Q5_K_L24.0B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Cydonia-24B-v4.3Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Cydonia-24B-v4.2.0Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Mistral-Small-24B-Instruct-2501-abliteratedQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Dolphin-Mistral-24B-Venice-EditionQ5_K_L24.0B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Mistral-Small-24B-Instruct-2501Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Hearthfire-24BQ5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Mistral-Small-24B-ArliAI-RPMax-v1.4Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Codex-24B-Small-3.2Q5_K_L23.6B16.00 GiB1.41 GiB18.52 GiB0.08 GiB21±22%
Qwen3-VL-8B-Instruct-HereticQ8_08.8B16.22 GiB1.27 GiB18.52 GiB0.08 GiB21±22%
Qwen3-8B-DeepSeek-v3.2-Speciale-DistillQ8_08.2B16.22 GiB1.27 GiB18.52 GiB0.08 GiB21±22%
Gemma-4-Gembrain-X-Core-31BIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
Gemma-4-Gembrain-X-31BIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
Gemma-4-31B-Isometry-Fabled-PersonaIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
Gemma-4-Novelist-31BIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
G4-MeroMero-31B-uncensored-hereticIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
G4-Alice-v1.2-31BIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
Gemma-4-Gemsicle-31BIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
Melinoe-Gemma4-31B-VL-hereticIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
G4-MeroMero-31BIQ4_XS31.3B15.70 GiB1.74 GiB18.52 GiB0.08 GiB21±22%
From the filePredictedwhat these mean

Speed is modeled, not measured: decode is memory-bandwidth bound, so tokens per second is bytes read per token against achievable bandwidth. Mixture-of-experts models carry a wider band because only the routed experts are read each step, and few have been measured publicly.

Measured on this card

third-party benchmarks, aggregated
WorkloadMedianMiddle 50%Runs
Image generation15.27 it/s11.4118.32100
Prompt processing2862.73 tok/s2484.223293.5014
Text generation95.99 tok/s92.4596.8012
Benchmarked· n=100

Aggregated from community-submitted runs, so the spread is wide by nature — it covers different models, resolutions, step counts and settings, not one controlled configuration. Read the middle 50% rather than the median alone. These figures are reproduced with attribution from vladmandic-sd-data-benchmark, which publishes no licence — so we display and link rather than redistribute them.

Questions people ask

What AI models can a RTX A4500 run?
1927 of 2118 indexed open-weight models fit a RTX A4500 at 32,768 context with q4_0 KV cache, the largest being Delphi-25B-SimpleRL-Math at I1-Q2_K_S. That covers text, vision-language, image, video and speech models.
How much usable memory does a RTX A4500 actually have?
Its nameplate is 20 GB, but about 18.60 GiB is available to a model once driver and compositor overhead is accounted for.
Is a RTX A4500 fast for local AI?
Its memory bandwidth is 640 GB/s, and that figure — not teraflops — is what governs token generation speed. Capacity decides what you can run; bandwidth decides how fast it runs.