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. 1866 of 2118 indexed models fit at 64K 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 1591vision language 171video 16embedding 26audio tts 21audio asr 39image 2

What fits at 64K context

largest quantization that fits, per model · 1866 of 2118 indexed
ModelBest quantParamsWeightsKVTotal in memoryHeadroomtok/s
glm-4-9b-chat-1mQ4_K_L9.5B6.30 GiB11.25 GiB18.60 GiB0.00 GiB21±22%
Nemotron-Cascade-2-30B-A3B-heretic-ara-uncensoredMoEI1-IQ3_S31.6B16.70 GiB0.91 GiB18.60 GiB0.00 GiB76±37%
Nemotron-Cascade-2-30B-A3BMoEI1-IQ3_S31.6B16.70 GiB0.91 GiB18.60 GiB0.00 GiB76±37%
MN-GRAND-23.5B-Gutenberg-UNCENSORED-V2-GLM4.7-ThinkingI1-IQ4_XS23.4B11.84 GiB5.70 GiB18.59 GiB0.01 GiB21±22%
GLM-Z1-32B-0414IQ4_XS32.6B16.42 GiB1.07 GiB18.58 GiB0.02 GiB21±22%
GLM-4-32B-0414IQ4_XS32.6B16.42 GiB1.07 GiB18.58 GiB0.02 GiB21±22%
granite-8b-code-instruct-4kF168.1B15.01 GiB2.53 GiB18.58 GiB0.02 GiB21±22%
granite-8b-code-base-4kF168.1B15.01 GiB2.53 GiB18.58 GiB0.02 GiB21±22%
Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16UD-IQ3_S33.0B17.53 GiB0.00 GiB18.57 GiB0.03 GiB21±22%
Qwen3-16B-A3BMoEQ8_016.0B15.89 GiB1.69 GiB18.57 GiB0.03 GiB45±37%
grug-27bQ4_127.4B16.38 GiB1.13 GiB18.57 GiB0.03 GiB21±22%
Carnice-V2-27bQ4_127.4B16.38 GiB1.13 GiB18.57 GiB0.03 GiB21±22%
Fara1.5-27BQ4_127.4B16.38 GiB1.13 GiB18.57 GiB0.03 GiB21±22%
Yi-34B-200K-DARE-megamerge-v8I1-IQ3_XS34.4B13.26 GiB4.22 GiB18.56 GiB0.04 GiB21±22%
dolphin-2.9.1-yi-1.5-34bI1-IQ3_XS34.4B13.26 GiB4.22 GiB18.56 GiB0.04 GiB21±22%
OrionStar-Yi-34B-Chat-LlamaI1-IQ3_XS34.4B13.26 GiB4.22 GiB18.56 GiB0.04 GiB21±22%
Yi-34B-200K-LlamafiedI1-IQ3_XS34.4B13.26 GiB4.22 GiB18.56 GiB0.04 GiB21±22%
Yi-1.5-34BIQ3_XS34.4B13.26 GiB4.22 GiB18.56 GiB0.04 GiB21±22%
Merged-RP-Stew-V2-34BI1-IQ3_XS34.4B13.26 GiB4.22 GiB18.56 GiB0.04 GiB21±22%
Capybara-Tess-Yi-34B-200KI1-IQ3_XS34.4B13.26 GiB4.22 GiB18.56 GiB0.04 GiB21±22%
Skywork-R1V3-38BQ4_K_S38.4B17.49 GiB0.00 GiB18.56 GiB0.04 GiB21±22%
GLM-4.7-Flash-hereticMoEQ4_K_S29.9B16.62 GiB0.93 GiB18.55 GiB0.05 GiB70±37%
GLM-4-32B-0414-Korean-CultureI1-IQ4_XS32.6B16.39 GiB1.07 GiB18.55 GiB0.05 GiB21±22%
glm-4-9b-chat-abliteratedQ4_K_L9.4B6.25 GiB11.25 GiB18.55 GiB0.05 GiB21±22%
glm-4-9b-chatQ4_K_L9.4B6.25 GiB11.25 GiB18.55 GiB0.05 GiB21±22%
Nous-Capybara-limarpv3-34BI1-IQ3_XXS34.4B13.24 GiB4.22 GiB18.54 GiB0.06 GiB21±22%
Pantheon-Reasoning-26B-A4B-1.1MoEQ4_K_L26.5B16.76 GiB0.79 GiB18.53 GiB0.07 GiB21±22%
Huihui-Qwen3-4B-Instruct-2507-abliteratedF324.0B14.99 GiB2.53 GiB18.53 GiB0.07 GiB21±22%
OpenCaption-4B-VL-SFT-v1.0F324.4B14.99 GiB2.53 GiB18.53 GiB0.07 GiB21±22%
codegeex4-all-9bQ5_K_S9.4B6.23 GiB11.25 GiB18.53 GiB0.07 GiB21±22%
Goetia-26B-A4B-v1.3-Absolute-Heretic-ARAMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
Frank-26B-A4BMoEI1-Q5_K_S26.5B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
G4-MeroMero-26B-A4B-it-uncensored-hereticMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
EVE-26b-XENO-HATMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
Gemma-4-26B-A4B-Animus-V14.1-FFT-hereticMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
G4-MeroMero-26B-A4BMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
G4-Dark-Soul-26B-A4BMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-local-abliterated-sota-internal-t34MoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-SOMPOA-heresyMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-hereticMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-abliterixMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-heretic-ara-v2MoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
Gemma-4-26B-A4B-it-heretic-antislopMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-ultra-uncensored-hereticMoEQ5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-uncensored-hereticMoEQ5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-Claude-Opus-Distill-v2MoEI1-Q5_K_S26.5B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-Heretic-StableMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-Uncensored-MAXMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-ara-abliteratedMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
Huihui-gemma-4-26B-A4B-it-abliteratedMoEI1-Q5_K_S26.5B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
Gemma-4-26B-A4B-AbliteratedMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma4-26b-fiction-bf16MoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-heretic-araMoEI1-Q5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4B-it-abliteratedMoEQ5_K_S25.8B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-26B-A4BMoEQ5_K_S26.5B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
Qwen3.8-27BQ4_127.8B16.34 GiB1.13 GiB18.52 GiB0.08 GiB21±22%
Qwen3.6-27BQ4_127.8B16.34 GiB1.13 GiB18.52 GiB0.08 GiB21±22%
granite-4.0-h-smallMoEIQ4_NL32.2B17.25 GiB0.28 GiB18.52 GiB0.08 GiB57±37%
gemma-4-A4B-98e-v6-coder-itMoEQ6_K_L20.5B16.75 GiB0.79 GiB18.52 GiB0.08 GiB21±22%
gemma-4-A4B-98e-v7-coder-itMoEQ6_K_L20.5B16.75 GiB0.79 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?
1866 of 2118 indexed open-weight models fit a RTX A4500 at 65,536 context with q4_0 KV cache, the largest being glm-4-9b-chat-1m at Q4_K_L. 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.