Best Local AI Models for AMD Radeon RX 6600 (8 GB VRAM)

Q: What is the VRAM and memory bandwidth of the AMD Radeon RX 6600?

The AMD Radeon RX 6600 features 8 GB of VRAM and a memory bandwidth of 224 GB/s (GDDR6 128-bit). In local language model inference, VRAM determines which model sizes fit on the card, while memory bandwidth dictates how many tokens per second the GPU generates.

Q: What is the best local AI model to run on a AMD Radeon RX 6600?

The best overall model for the AMD Radeon RX 6600 is Qwen/Qwen3-8B-GGUF using the recommended Q6_K quantization (7.63 GB total memory). With 8 GB of VRAM, this GPU typically runs a 7–8B model at Q6, entirely in VRAM at full GPU speed. Check our guide to the best LLMs for 8 GB VRAM for details.

The AMD Radeon RX 6600 has 8 GB of VRAM. Here are the popular AI models it can run locally (4,096-token context, ~16.0 GB system RAM assumed), ranked by popularity.

Verdict: 8 GB of GDDR6 at 224 GB/s: 7B–9B models fit in VRAM in 4-bit quantization, but the narrow bus makes generation slower than on faster 8 GB cards.

VRAM & Memory

8 GB

GDDR6 128-bit

Bandwidth

224 GB/s

RDNA 2

Fits in VRAM

25 models

Zero offload

TDP / Assumed RAM

132W

RAM: 16.0 GB

At a glance — 25 of the 36 most popular models run fully in VRAM on the AMD Radeon RX 6600 (8 GB), with about 37 tokens/s estimated on an 8B model in Q4. A solid pick is Qwen/Qwen3-8B-GGUF (Q6_K, 7.63 GB, ~35.8 t/s estimated).

The AMD Radeon RX 6600 is built on AMD's RDNA 2 architecture featuring GDDR6 128-bit delivering 224 GB/s of raw memory bandwidth. 8 GB of GDDR6 at 224 GB/s: 7B–9B models fit in VRAM in 4-bit quantization, but the narrow bus makes generation slower than on faster 8 GB cards.

Equipped with 8 GB of dedicated VRAM, the AMD Radeon RX 6600 can run 25 popular open-source models completely in GPU memory without offloading. This includes full-speed execution for weights like Qwen3-8B-GGUF, Qwen3-4B-GGUF, Qwen2.5-7B-Instruct-GGUF. For a comprehensive breakdown of compatible model weights, see our guide to the best LLMs for 8 GB VRAM.

With a memory bandwidth of 224 GB/s, this card can generate tokens at an estimated peak rate of ~37.3 tokens/second on an 8B parameter model (Q4_K_M). Its rated power draw is 132W TDP, so ensure your system's power supply and case ventilation are adequate for sustained local inferencing.

New to this? Read: How much VRAM do you need?

How the AMD Radeon RX 6600 compares with similar cards

Compared with the AMD Radeon RX 6650 XT, the AMD Radeon RX 6600 has the same 8 GB of VRAM, so the same models fit fully on the GPU; about 20% slower token generation (~37 vs ~47 tokens/s on an 8B model in Q4, from 224 vs 280 GB/s) and a lower board power (132 vs 180 W). Side-by-side comparison
Compared with the AMD Radeon RX 7600, the AMD Radeon RX 6600 has the same 8 GB of VRAM, so the same models fit fully on the GPU; about 22% slower token generation (~37 vs ~48 tokens/s on an 8B model in Q4, from 224 vs 288 GB/s); a lower board power (132 vs 165 W) and an older architecture (RDNA 2 vs RDNA 3). Side-by-side comparison
Compared with the NVIDIA RTX 3050, the AMD Radeon RX 6600 has the same 8 GB of VRAM, so the same models fit fully on the GPU; the same 224 GB/s of memory bandwidth, so the same estimated ~37 tokens/s on an 8B model in Q4; a higher board power (132 vs 130 W) and a different architecture (RDNA 2 vs Ampere). For local LLMs the two generate tokens at the same speed: the difference comes down to GPU compute, which mainly affects prompt processing. Side-by-side comparison

Token speeds here are a conservative estimate (memory bandwidth ÷ 6, for an 8B model in Q4 that reads about 5 GB of weights per token, plus overhead); prompt processing depends on GPU compute instead.

25 fit fully in VRAM · 11 run with offload

Only show models that fit fully in VRAM

Model	Size	Quant.	Quality	Memory	Speed~	Verdict
Qwen/Qwen3-8B-GGUF	8.19B	Q6_K	Excellent	7.63 GB	35.8 t/s	Fits in VRAM
Qwen/Qwen3-4B-GGUF	4.02B	Q8_0	Excellent	5.35 GB	56.2 t/s	Fits in VRAM
Qwen/Qwen2.5-7B-Instruct-GGUF	7.62B	Q6_K	Excellent	6.84 GB	38.5 t/s	Fits in VRAM
unsloth/NVIDIA-Nemotron-3.5-Bolt-E4B-GGUF	8.0B	Q6_K_XL	Excellent	7.62 GB	33.1 t/s	Fits in VRAM
Qwen/Qwen2.5-1.5B-Instruct-GGUF	1.54B	GGUF	Excellent	4.23 GB	67.6 t/s	Fits in VRAM
unsloth/LFM2.5-24B-A2B-GGUF	23.97B	IQ2_M	Very low	7.9 GB	31.9 t/s	Fits in VRAM
Qwen/Qwen2.5-0.5B-Instruct-GGUF	0.49B	GGUF	Excellent	2.03 GB	189.9 t/s	Fits in VRAM
unsloth/Ornith-1.0-9B-GGUF	—	Q6_K	Excellent	7.89 GB	32.2 t/s	Fits in VRAM
Qwen/Qwen2.5-Coder-7B-Instruct-GGUF	7.62B	Q6_K	Excellent	6.84 GB	38.5 t/s	Fits in VRAM
ggml-org/gpt-oss-120b-GGUF	116.83B	BF16	Very low	2.42 GB	151.6 t/s	Fits in VRAM
LiquidAI/LFM3-1.7B-GGUF	1.73B	BF16	Excellent	4.08 GB	69.4 t/s	Fits in VRAM
janhq/Jan-v3.5-4B-gguf	4.41B	Q8_0	Excellent	5.73 GB	51.2 t/s	Fits in VRAM
Qwen/Qwen2.5-3B-Instruct-GGUF	3.09B	GGUF	Excellent	7.27 GB	35.4 t/s	Fits in VRAM
bartowski/Meta-Llama-3.1-8B-Instruct-GGUF	8.03B	Q6_K_L	Excellent	7.66 GB	35.1 t/s	Fits in VRAM
unsloth/Llama-3.2-3B-Instruct-GGUF	3.21B	F16	Excellent	7.23 GB	37.4 t/s	Fits in VRAM
LiquidAI/LFM2.5-1.2B-Instruct-GGUF	1.17B	BF16	Excellent	3.03 GB	102.6 t/s	Fits in VRAM
lmstudio-community/gemma-3-1b-it-GGUF	1.0B	Q8_0	Excellent	1.96 GB	224.9 t/s	Fits in VRAM
Qwen/Qwen3-0.6B-GGUF	0.75B	Q8_0	Excellent	1.83 GB	376.1 t/s	Fits in VRAM
bartowski/Qwen_Qwen3-0.6B-GGUF	0.75B	BF16	Excellent	2.64 GB	159.4 t/s	Fits in VRAM
unsloth/Qwen3-1.7B-GGUF	1.72B	BF16	Excellent	4.45 GB	69.8 t/s	Fits in VRAM
LiquidAI/LFM2.5-350M-GGUF	0.35B	BF16	Excellent	1.51 GB	338.1 t/s	Fits in VRAM
Qwen/Qwen2.5-Coder-14B-Instruct-GGUF	14.77B	Q2_K	Low	6.92 GB	41.7 t/s	Fits in VRAM
unsloth/DeepSeek-R1-0528-Qwen3-8B-GGUF	8.19B	Q6_K	Excellent	7.63 GB	35.8 t/s	Fits in VRAM
Qwen/Qwen2.5-Coder-1.5B-Instruct-GGUF	1.54B	Q8_0	Excellent	2.67 GB	127.0 t/s	Fits in VRAM
bartowski/Qwen2.5-14B-Instruct-GGUF	14.77B	IQ3_M	Fair	7.99 GB	34.8 t/s	Fits in VRAM
unsloth/gpt-oss-20b-GGUF	20.91B	F16	Very good	13.74 GB	3.9 t/s	Offload
bartowski/Qwen2.5-32B-Instruct-GGUF	32.76B	Q5_K_L	Very good	23.91 GB	2.3 t/s	Offload
unsloth/Qwen3-Coder-30B-A3B-Instruct-GGUF	30.53B	Q5_K_XL	Very good	21.42 GB	2.5 t/s	Offload
Qwen/Qwen3-14B-GGUF	14.77B	Q8_0	Excellent	16.05 GB	3.4 t/s	Offload
unsloth/flint-GGUF	39.79B	Q3_K_XL	Fair	18.13 GB	2.9 t/s	Offload
unsloth/GLM-4.7-Flash-GGUF	31.22B	Q5_K_XL	Very good	21.21 GB	2.5 t/s	Offload
bartowski/Kwaipilot_KAT-Coder-V2.5-Dev-GGUF	34.66B	Q5_K_S	Very good	23.38 GB	2.2 t/s	Offload
ggml-org/NVIDIA-Nemotron-3.5-Lightning-30B-A3B-GGUF	31.58B	Q4_0	Good	18.42 GB	2.8 t/s	Offload
bartowski/Llama-3.3-70B-Instruct-GGUF	70.55B	IQ2_S	Very low	22.93 GB	2.4 t/s	Offload
unsloth/Qwen3-Coder-Next-GGUF	79.67B	IQ2_XXS	Very low	22.89 GB	2.3 t/s	Offload
bartowski/Nanbeige_Nanbeige4.3-33B-GGUF	33.12B	Q5_K_S	Very good	23.65 GB	2.3 t/s	Offload

"Fits in VRAM" = fast, fully on GPU. "Offload" = part on system RAM, slower. Speed is a rough estimate from the AMD Radeon RX 6600's 224 GB/s memory bandwidth (offloaded models are limited by system RAM).

Frequently asked questions

What is the VRAM and memory bandwidth of the AMD Radeon RX 6600?

The AMD Radeon RX 6600 features 8 GB of VRAM and a memory bandwidth of 224 GB/s (GDDR6 128-bit). In local language model inference, VRAM determines which model sizes fit on the card, while memory bandwidth dictates how many tokens per second the GPU generates.

What is the best local AI model to run on a AMD Radeon RX 6600?

The best overall model for the AMD Radeon RX 6600 is Qwen/Qwen3-8B-GGUF using the recommended Q6_K quantization (7.63 GB total memory). With 8 GB of VRAM, this GPU typically runs a 7–8B model at Q6, entirely in VRAM at full GPU speed. Check our guide to the best LLMs for 8 GB VRAM for details.

What models can you run on an 8 GB GPU like the AMD Radeon RX 6600?

With 8 GB of VRAM, the AMD Radeon RX 6600 comfortably runs 7B and 8B models (such as Llama 3.1 8B, Mistral 7B, or Qwen 2.5 7B) using Q4_K_M or Q5_K_M quantizations (~5.5 to 6.8 GB). Running 14B models requires offloading memory to system RAM, which lowers token generation speed.

Does the AMD Radeon RX 6600 work with Ollama and LM Studio?

Yes. Under Linux, the AMD Radeon RX 6600 supports native ROCm acceleration in Ollama and llama.cpp. On Windows, Ollama and LM Studio utilize the Vulkan or DirectML backends to leverage the card's full 8 GB VRAM pool.