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. 1943 of 2118 indexed models fit at 4K context with f16 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 1668vision language 171video 16audio asr 39image 2audio tts 21embedding 26

What fits at 4K context

largest quantization that fits, per model · 1943 of 2118 indexed
ModelBest quantParamsWeightsKVTotal in memoryHeadroomtok/s
INTELLECT-2IQ4_XS32.8B16.50 GiB1.00 GiB18.60 GiB0.00 GiB21±22%
QwQ-32BIQ4_XS32.8B16.50 GiB1.00 GiB18.60 GiB0.00 GiB21±22%
Aurora-Code-1MoEIQ4_XS34.7B17.51 GiB0.08 GiB18.60 GiB0.00 GiB119±37%
grug-35bMoEIQ4_XS35.1B17.51 GiB0.08 GiB18.60 GiB0.00 GiB119±37%
WorldSim-Opus-3.6-35B-A3BMoEIQ4_XS35.1B17.51 GiB0.08 GiB18.60 GiB0.00 GiB119±37%
Qwen3.6-35B-A3B-AnkoMoEIQ4_XS35.1B17.51 GiB0.08 GiB18.60 GiB0.00 GiB119±37%
KAT-Coder-V2.5-DevMoEIQ4_XS34.7B17.51 GiB0.08 GiB18.60 GiB0.00 GiB119±37%
Ornith-1.0-35BMoEIQ4_XS34.7B17.51 GiB0.08 GiB18.60 GiB0.00 GiB119±37%
Nex-N2-miniMoEIQ4_XS35.1B17.51 GiB0.08 GiB18.60 GiB0.00 GiB119±37%
Qwen3-VL-32B-InstructIQ4_XS33.4B16.50 GiB1.00 GiB18.59 GiB0.01 GiB21±22%
Qwen3-VL-32B-ThinkingIQ4_XS33.4B16.50 GiB1.00 GiB18.59 GiB0.01 GiB21±22%
Qwen3-32BIQ4_XS32.8B16.50 GiB1.00 GiB18.59 GiB0.01 GiB21±22%
Gemma-4-Gembrain-X-Core-31BIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-Gembrain-X-31BIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-31B-Isometry-Fabled-PersonaIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-Novelist-31BIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
G4-MeroMero-31B-uncensored-hereticIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
G4-Alice-v1.2-31BIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-Gemsicle-31BIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Melinoe-Gemma4-31B-VL-hereticIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
G4-MeroMero-31BIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Melinoe-Gemma4-31B-VLIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-31B-Storymaxxed3IQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-Harmonia-31B-uncensored-hereticIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Huihui-gemma-4-31B-it-qat-q4_0-unquantized-abliteratedIQ4_XS32.7B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-Queen-it-qat-q4_0-unquantizedIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-AssGuard-31BIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
copywriter-gemma4-31bIQ4_XS32.7B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-Garnet-V2-31B-it-ultra-uncensored-hereticIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-it-abliterated-v3IQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-it-noloopIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Lilith-31B-v1.0IQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Webs-Sejong-31B-v7IQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
JGOS-31B-ThinkIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-MergemaxxedIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-Queen-31B-it-uncensored-hereticIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-Sphinsikus-Chronist-31BIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma4-31B-Finetuned-V2IQ4_XS32.7B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-31B-storymaxxed2IQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-it-Grand-Horror-X-INTENSE-HERETIC-UNCENSORED-ThinkingIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-it-The-DECKARD-HERETIC-UNCENSORED-ThinkingIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-it-uncensored-hereticIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Huihui-gemma-4-31B-it-abliterated-v2IQ4_XS32.7B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-Queen-31B-itIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-it-abliteratedIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31b-it-heretic-araIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-it-hereticIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Gemma-4-31B-Fable-CoderIQ4_XS32.7B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31B-anthologyIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
Omni-31B-Turkish-Reasoning-ModelIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31b-kairosIQ4_XS31.3B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
gemma-4-31BIQ4_XS32.7B15.70 GiB1.80 GiB18.58 GiB0.02 GiB21±22%
CallerIQ4_XS32.8B16.48 GiB1.00 GiB18.58 GiB0.02 GiB21±22%
Dumpling-Qwen2.5-32BIQ4_XS32.8B16.48 GiB1.00 GiB18.58 GiB0.02 GiB21±22%
OREAL-32BIQ4_XS32.8B16.48 GiB1.00 GiB18.58 GiB0.02 GiB21±22%
QwQ-32B-Preview-abliterated-linear25I1-IQ4_XS32.8B16.48 GiB1.00 GiB18.58 GiB0.02 GiB21±22%
openhands-lm-32b-v0.1I1-IQ4_XS32.8B16.48 GiB1.00 GiB18.58 GiB0.02 GiB21±22%
Qwen2.5-Coder-32B-abliteratedI1-IQ4_XS32.8B16.48 GiB1.00 GiB18.58 GiB0.02 GiB21±22%
m1-32bI1-IQ4_XS32.8B16.48 GiB1.00 GiB18.58 GiB0.02 GiB21±22%
XMainframe-v2-Instruct-32bI1-IQ4_XS32.8B16.48 GiB1.00 GiB18.58 GiB0.02 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?
1943 of 2118 indexed open-weight models fit a RTX A4500 at 4,096 context with f16 KV cache, the largest being INTELLECT-2 at IQ4_XS. 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.
RTX A4500 — what AI models can it run locally? — ossmodeldb