Question 1

Is the RX 7800 XT 16GB or the T4 16GB better for local LLMs?

Accepted Answer

The RX 7800 XT 16GB has about 95% more memory bandwidth (624 vs 320 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 95% faster on the RX 7800 XT 16GB. Both fit the same number of catalog models at Q4/8K (25 of 61; 16 vs 16 GB VRAM). MSRP is $499 for the RX 7800 XT 16GB vs $2,000 for the T4 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 RX 7800 XT 16GB than the T4 16GB for LLM inference?

Accepted Answer

On memory bandwidth the RX 7800 XT 16GB leads by about 95% (624 vs 320 GB/s), and batch-1 decode tracks bandwidth. In the Q4/8K head-to-head on this page, the RX 7800 XT 16GB wins 44 of 44 shared model rows and the T4 16GB wins 0.

Question 3

Which can run larger models, the RX 7800 XT 16GB or the T4 16GB?

Accepted Answer

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

	RX 7800 XT 16GB	T4 16GB
Vendor	AMD	NVIDIA
VRAM	16 GB	16 GB
Memory type	GDDR6	GDDR6
Memory bandwidth	624 GB/s	320 GB/s
TDP	263 W	70 W
MSRP (list)	$499	$2,000
Buy	Search Amazon (affiliate)	Search Amazon (affiliate)

Model	Params (B)	RX 7800 XT 16GB tok/s	RX 7800 XT 16GB fits	T4 16GB tok/s	T4 16GB fits	Winner
Qwen3-0.6B	0.8	496.4 est.	Yes	254.5 est.	Yes	RX 7800 XT 16GB
gemma-3-1b-it	1.0	397.1 est.	Yes	203.6 est.	Yes	RX 7800 XT 16GB
Llama-3.2-1B-Instruct	1.2	330.9 est.	Yes	169.7 est.	Yes	RX 7800 XT 16GB
Qwen3-30B-A3B	30.5	286.6 est.	No	147.0 est.	No	RX 7800 XT 16GB
Qwen3-Coder-30B-A3B-Instruct	30.5	286.6 est.	No	147.0 est.	No	RX 7800 XT 16GB
Qwen3-30B-A3B-Instruct-2507	30.5	286.6 est.	No	147.0 est.	No	RX 7800 XT 16GB
GLM-4.7-Flash	31.2	275.1 est.	No	141.1 est.	No	RX 7800 XT 16GB
Qwen3-1.7B	2.0	198.5 est.	Yes	101.8 est.	Yes	RX 7800 XT 16GB
Llama-3.2-3B-Instruct	3.2	124.1 est.	Yes	63.6 est.	Yes	RX 7800 XT 16GB
gpt-oss-20b	21.5	110.3 est.	Yes	56.6 est.	Yes	RX 7800 XT 16GB
Phi-4-mini-instruct	3.8	104.5 est.	Yes	53.6 est.	Yes	RX 7800 XT 16GB
Phi-4-mini-reasoning	3.8	104.5 est.	Yes	53.6 est.	Yes	RX 7800 XT 16GB
gemma-3-4b-it	4.3	101.8 est.	Yes	52.2 est.	Yes	RX 7800 XT 16GB
Qwen3-4B-Instruct-2507	4.0	99.3 est.	Yes	50.9 est.	Yes	RX 7800 XT 16GB
Qwen3-4B-Thinking-2507	4.0	99.3 est.	Yes	50.9 est.	Yes	RX 7800 XT 16GB

RX 7800 XT 16GB vs T4 16GB for Local LLMs

Spec comparison

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

Fit coverage at Q4 / 8K

	RX 7800 XT 16GB	T4 16GB
Catalog models that fit	25 of 61	25 of 61
Largest exclusive fit	—	—