Question 1

Can RX 7900 XT 20GB run Llama 2 7B Chat?

Accepted Answer

Yes, RX 7900 XT 20GB can run Llama 2 7B Chat with a C grade (Runs well). Expected decode speed: 134.9 tok/s.

Question 2

How much VRAM does Llama 2 7B Chat need?

Accepted Answer

Llama 2 7B Chat (7B parameters) requires approximately 8.6 GB of memory with Q4_K_M quantization.

Question 3

What is the best quantization for Llama 2 7B Chat?

Accepted Answer

The recommended quantization for Llama 2 7B Chat is Q4_K_M, which balances quality and memory efficiency.

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	C	Runs well	112.4 tok/s	2505 ms	66K
Chat	C	Runs well	112.4 tok/s	939 ms	19K
Coding	C	Runs well	134.9 tok/s	1435 ms	37K
RAG	C	Runs well	112.4 tok/s	3131 ms	66K
Reasoning	C	Runs well	112.4 tok/s	2035 ms	37K

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.7 GB	Low	D32
Q3_K_S	3	3.4 GB	Low	D33
NVFP4	4

Can RX 7900 XT 20GB run Llama 2 7B Chat?

Memory breakdown