RTX 4070 Ti Super 16GB vs RTX 5070 12GB for Local LLMs

Both list the same memory bandwidth (672 GB/s), so per-token decode speed should be similar whenever a model fits both. The RTX 4070 Ti Super 16GB fits more of the catalog at Q4/8K — 25 vs 18 of 61 models (16 vs 12 GB VRAM). Largest model that fits the RTX 4070 Ti Super 16GB but not the RTX 5070 12GB: gpt-oss-20b (21.5B). MSRP is $799 for the RTX 4070 Ti Super 16GB 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 (40 shared models), the RTX 4070 Ti Super 16GB posts the higher tok/s in 16 rows vs 9. Methodology.

Spec comparison

	RTX 4070 Ti Super 16GB	RTX 5070 12GB
Vendor	NVIDIA	NVIDIA
VRAM	16 GB	12 GB
Memory type	GDDR6X	GDDR7
Memory bandwidth	672 GB/s	672 GB/s
TDP	285 W	250 W
MSRP (list)	$799	$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 40 shared models

Model	Params (B)	RTX 4070 Ti Super 16GB tok/s	RTX 4070 Ti Super 16GB fits	RTX 5070 12GB tok/s	RTX 5070 12GB fits	Winner
Qwen3-0.6B	0.8	534.5 est.	Yes	534.5 est.	Yes	Tie
gemma-3-1b-it	1.0	427.6 est.	Yes	427.6 est.	Yes	Tie
Llama-3.2-1B-Instruct	1.2	356.4 est.	Yes	356.4 est.	Yes	Tie
Qwen3-30B-A3B	30.5	308.6 est.	No	173.6 est.	No	RTX 4070 Ti Super 16GB
Qwen3-Coder-30B-A3B-Instruct	30.5	308.6 est.	No	173.6 est.	No	RTX 4070 Ti Super 16GB
Qwen3-30B-A3B-Instruct-2507	30.5	308.6 est.	No	173.6 est.	No	RTX 4070 Ti Super 16GB
GLM-4.7-Flash	31.2	296.3 est.	No	166.6 est.	No	RTX 4070 Ti Super 16GB
gpt-oss-20b	21.5	118.8 est.	Yes	266.2 est.	No	RTX 5070 12GB
Qwen3-1.7B	2.0	213.8 est.	Yes	213.8 est.	Yes	Tie
Llama-3.2-3B-Instruct	3.2	199.0 measured	Yes	133.6 est.	Yes	RTX 4070 Ti Super 16GB
Mistral-7B-Instruct-v0.3	7.2	59.4 est.	Yes	120.5 measured	Yes	RTX 5070 12GB
Phi-4-mini-instruct	3.8	112.5 est.	Yes	112.5 est.	Yes	Tie
Phi-4-mini-reasoning	3.8	112.5 est.	Yes	112.5 est.	Yes	Tie
gemma-3-4b-it	4.3	109.7 est.	Yes	109.7 est.	Yes	Tie
Qwen3-4B-Instruct-2507	4.0	106.9 est.	Yes	106.9 est.	Yes	Tie

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 4070 Ti Super 16GB	RTX 5070 12GB
Catalog models that fit	25 of 61	18 of 61
Largest exclusive fit	gpt-oss-20b (21.5B)	—

RTX 4070 Ti Super 16GB details → · RTX 5070 12GB details →