Question 1

Is the Arc A770 16GB or the RX 9070 16GB better for local LLMs?

Accepted Answer

The RX 9070 16GB has about 14% more memory bandwidth (640 vs 560 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 14% faster on the RX 9070 16GB. Both fit the same number of catalog models at Q4/8K (25 of 61; 16 vs 16 GB VRAM). MSRP is $349 for the Arc A770 16GB vs $549 for the RX 9070 16GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price.

Question 2

How much faster is the Arc A770 16GB than the RX 9070 16GB for LLM inference?

Accepted Answer

On memory bandwidth the RX 9070 16GB leads by about 14% (640 vs 560 GB/s), and batch-1 decode tracks bandwidth. In the Q4/8K head-to-head on this page, the Arc A770 16GB wins 0 of 44 shared model rows and the RX 9070 16GB wins 44.

Question 3

Which can run larger models, the Arc A770 16GB or the RX 9070 16GB?

Accepted Answer

Neither — both fit 25 of 61 catalog models at Q4/8K (16 vs 16 GB VRAM).

	Arc A770 16GB	RX 9070 16GB
Vendor	Intel	AMD
VRAM	16 GB	16 GB
Memory type	GDDR6	GDDR6
Memory bandwidth	560 GB/s	640 GB/s
TDP	225 W	220 W
MSRP (list)	$349	$549
Buy	Search Amazon (affiliate)	Search Amazon (affiliate)

Model	Params (B)	Arc A770 16GB tok/s	Arc A770 16GB fits	RX 9070 16GB tok/s	RX 9070 16GB fits	Winner
Qwen3-0.6B	0.8	445.5 est.	Yes	509.1 est.	Yes	RX 9070 16GB
gemma-3-1b-it	1.0	356.4 est.	Yes	407.3 est.	Yes	RX 9070 16GB
Llama-3.2-1B-Instruct	1.2	297.0 est.	Yes	339.4 est.	Yes	RX 9070 16GB
Qwen3-30B-A3B	30.5	257.2 est.	No	293.9 est.	No	RX 9070 16GB
Qwen3-Coder-30B-A3B-Instruct	30.5	257.2 est.	No	293.9 est.	No	RX 9070 16GB
Qwen3-30B-A3B-Instruct-2507	30.5	257.2 est.	No	293.9 est.	No	RX 9070 16GB
GLM-4.7-Flash	31.2	246.9 est.	No	282.1 est.	No	RX 9070 16GB
Qwen3-1.7B	2.0	178.2 est.	Yes	203.6 est.	Yes	RX 9070 16GB
Llama-3.2-3B-Instruct	3.2	111.4 est.	Yes	127.3 est.	Yes	RX 9070 16GB
gpt-oss-20b	21.5	99.0 est.	Yes	113.1 est.	Yes	RX 9070 16GB
Phi-4-mini-instruct	3.8	93.8 est.	Yes	107.2 est.	Yes	RX 9070 16GB
Phi-4-mini-reasoning	3.8	93.8 est.	Yes	107.2 est.	Yes	RX 9070 16GB
gemma-3-4b-it	4.3	91.4 est.	Yes	104.4 est.	Yes	RX 9070 16GB
Qwen3-4B-Instruct-2507	4.0	89.1 est.	Yes	101.8 est.	Yes	RX 9070 16GB
Qwen3-4B-Thinking-2507	4.0	89.1 est.	Yes	101.8 est.	Yes	RX 9070 16GB

Arc A770 16GB vs RX 9070 16GB for Local LLMs

Spec comparison

Q4 / 8K head-to-head — top 15 of 44 shared models

Fit coverage at Q4 / 8K

	Arc A770 16GB	RX 9070 16GB
Catalog models that fit	25 of 61	25 of 61
Largest exclusive fit	—	—