RTX 4060 8GB vs RTX 5070 12GB for Local LLMs

The RTX 5070 12GB has about 147% more memory bandwidth (672 vs 272 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 147% faster on the RTX 5070 12GB. The RTX 5070 12GB fits more of the catalog at Q4/8K — 18 vs 17 of 61 models (12 vs 8 GB VRAM). Largest model that fits the RTX 5070 12GB but not the RTX 4060 8GB: gemma-3-12b-it (12.2B). MSRP is $299 for the RTX 4060 8GB vs $549 for the RTX 5070 12GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. In the Q4/8K head-to-head below (38 shared models), the RTX 5070 12GB posts the higher tok/s in 38 rows vs 0. Methodology.

Spec comparison

	RTX 4060 8GB	RTX 5070 12GB
Vendor	NVIDIA	NVIDIA
VRAM	8 GB	12 GB
Memory type	GDDR6	GDDR7
Memory bandwidth	272 GB/s	672 GB/s
TDP	115 W	250 W
MSRP (list)	$299	$549
Buy	Search Amazon (affiliate)	Search Amazon (affiliate)

MSRP is the launch list price, not live retail. Buy links are Amazon affiliate links — the price after you click is the live price.

Q4 / 8K head-to-head — top 15 of 38 shared models

Model	Params (B)	RTX 4060 8GB tok/s	RTX 4060 8GB fits	RTX 5070 12GB tok/s	RTX 5070 12GB fits	Winner
Qwen3-0.6B	0.8	216.4 est.	Yes	534.5 est.	Yes	RTX 5070 12GB
gemma-3-1b-it	1.0	173.1 est.	Yes	427.6 est.	Yes	RTX 5070 12GB
Llama-3.2-1B-Instruct	1.2	144.2 est.	Yes	356.4 est.	Yes	RTX 5070 12GB
gpt-oss-20b	21.5	47.9 est.	No	266.2 est.	No	RTX 5070 12GB
Qwen3-1.7B	2.0	86.5 est.	Yes	213.8 est.	Yes	RTX 5070 12GB
Qwen3-30B-A3B	30.5	31.2 est.	No	173.6 est.	No	RTX 5070 12GB
Qwen3-Coder-30B-A3B-Instruct	30.5	31.2 est.	No	173.6 est.	No	RTX 5070 12GB
Qwen3-30B-A3B-Instruct-2507	30.5	31.2 est.	No	173.6 est.	No	RTX 5070 12GB
GLM-4.7-Flash	31.2	30.0 est.	No	166.6 est.	No	RTX 5070 12GB
Llama-3.2-3B-Instruct	3.2	54.1 est.	Yes	133.6 est.	Yes	RTX 5070 12GB
Mistral-7B-Instruct-v0.3	7.2	24.0 est.	Yes	120.5 measured	Yes	RTX 5070 12GB
Phi-4-mini-instruct	3.8	45.6 est.	Yes	112.5 est.	Yes	RTX 5070 12GB
Phi-4-mini-reasoning	3.8	45.6 est.	Yes	112.5 est.	Yes	RTX 5070 12GB
gemma-3-4b-it	4.3	44.4 est.	Yes	109.7 est.	Yes	RTX 5070 12GB
Qwen3-4B-Instruct-2507	4.0	43.3 est.	Yes	106.9 est.	Yes	RTX 5070 12GB

est. = bandwidth-based estimate; measured = curated real benchmark that overrides the estimate. Fits = weights + KV(8K) + 1 GB overhead ≤ 95% of VRAM.

Fit coverage at Q4 / 8K

	RTX 4060 8GB	RTX 5070 12GB
Catalog models that fit	17 of 61	18 of 61
Largest exclusive fit	—	gemma-3-12b-it (12.2B)

RTX 4060 8GB details → · RTX 5070 12GB details →