Question 1

Can RX 6900 XT 16GB run Meta Llama 3.1 8B Instruct?

Accepted Answer

Yes, RX 6900 XT 16GB can run Meta Llama 3.1 8B Instruct with a C grade (Runs well). Expected decode speed: 75.5 tok/s.

Question 2

How much VRAM does Meta Llama 3.1 8B Instruct need?

Accepted Answer

Meta Llama 3.1 8B Instruct (8B parameters) requires approximately 8.9 GB of memory with Q4_K_M quantization.

Question 3

What is the best quantization for Meta Llama 3.1 8B Instruct?

Accepted Answer

The recommended quantization for Meta Llama 3.1 8B Instruct is Q4_K_M, which balances quality and memory efficiency.

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	C	Runs well	59.8 tok/s	4709 ms	50K
Chat	C	Runs well	59.8 tok/s	1766 ms	15K
Coding	C	Runs well	75.5 tok/s	2563 ms	29K
RAG	C	Runs well	59.8 tok/s	5886 ms	50K
Reasoning	C	Runs well	59.8 tok/s	3826 ms	29K

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.1 GB	Low	D34
Q3_K_S	3	3.9 GB	Low	D35
NVFP4	4

Can RX 6900 XT 16GB run Meta Llama 3.1 8B Instruct?

Memory breakdown