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RTX 4070 12GB vs RX 7600 8GB for Local LLMs

The RTX 4070 12GB has about 75% more memory bandwidth (504 vs 288 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 75% faster on the RTX 4070 12GB. The RTX 4070 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 4070 12GB but not the RX 7600 8GB: gemma-3-12b-it (12.2B). MSRP is $599 for the RTX 4070 12GB vs $269 for the RX 7600 8GB. 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 4070 12GB posts the higher tok/s in 37 rows vs 1. Methodology.

Spec comparison

RTX 4070 12GBRX 7600 8GB
VendorNVIDIAAMD
VRAM12 GB8 GB
Memory typeGDDR6XGDDR6
Memory bandwidth504 GB/s288 GB/s
TDP200 W165 W
MSRP (list)$599$269
BuyASUS Dual GeForce RTX 4070 OC 12GB (affiliate) · More listingsSearch 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

ModelParams (B)RTX 4070 12GB tok/sRTX 4070 12GB fitsRX 7600 8GB tok/sRX 7600 8GB fitsWinner
Qwen3-0.6B0.8400.9 est.Yes229.1 est.YesRTX 4070 12GB
gemma-3-1b-it1.0320.7 est.Yes183.3 est.YesRTX 4070 12GB
Llama-3.2-1B-Instruct1.2267.3 est.Yes152.7 est.YesRTX 4070 12GB
gpt-oss-20b21.5199.6 est.No50.7 est.NoRTX 4070 12GB
Llama-3.2-3B-Instruct3.2160.7 measuredYes48.5 measuredYesRTX 4070 12GB
Qwen3-1.7B2.0160.4 est.Yes91.6 est.YesRTX 4070 12GB
Qwen3-30B-A3B30.5130.2 est.No33.1 est.NoRTX 4070 12GB
Qwen3-Coder-30B-A3B-Instruct30.5130.2 est.No33.1 est.NoRTX 4070 12GB
Qwen3-30B-A3B-Instruct-250730.5130.2 est.No33.1 est.NoRTX 4070 12GB
GLM-4.7-Flash31.2125.0 est.No31.7 est.NoRTX 4070 12GB
Phi-4-mini-instruct3.884.4 est.Yes48.2 est.YesRTX 4070 12GB
Phi-4-mini-reasoning3.884.4 est.Yes48.2 est.YesRTX 4070 12GB
gemma-3-4b-it4.382.2 est.Yes47.0 est.YesRTX 4070 12GB
Qwen3-4B-Instruct-25074.080.2 est.Yes45.8 est.YesRTX 4070 12GB
Qwen3-4B-Thinking-25074.080.2 est.Yes45.8 est.YesRTX 4070 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 4070 12GBRX 7600 8GB
Catalog models that fit18 of 6117 of 61
Largest exclusive fitgemma-3-12b-it (12.2B)—

RTX 4070 12GB details → · RX 7600 8GB details →