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RTX 3080 10GB vs RTX 5060 8GB for Local LLMs

The RTX 3080 10GB has about 70% more memory bandwidth (760 vs 448 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 70% faster on the RTX 3080 10GB. Both fit the same number of catalog models at Q4/8K (17 of 61; 10 vs 8 GB VRAM). MSRP is $699 for the RTX 3080 10GB vs $299 for the RTX 5060 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 3080 10GB posts the higher tok/s in 38 rows vs 0. Methodology.

Spec comparison

RTX 3080 10GBRTX 5060 8GB
VendorNVIDIANVIDIA
VRAM10 GB8 GB
Memory typeGDDR6XGDDR7
Memory bandwidth760 GB/s448 GB/s
TDP320 W145 W
MSRP (list)$699$299
BuySearch 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

ModelParams (B)RTX 3080 10GB tok/sRTX 3080 10GB fitsRTX 5060 8GB tok/sRTX 5060 8GB fitsWinner
Qwen3-0.6B0.8604.5 est.Yes356.4 est.YesRTX 3080 10GB
gemma-3-1b-it1.0483.6 est.Yes285.1 est.YesRTX 3080 10GB
Llama-3.2-1B-Instruct1.2403.0 est.Yes237.6 est.YesRTX 3080 10GB
Qwen3-1.7B2.0241.8 est.Yes142.5 est.YesRTX 3080 10GB
gpt-oss-20b21.5209.1 est.No78.9 est.NoRTX 3080 10GB
Llama-3.2-3B-Instruct3.2151.1 est.Yes89.1 est.YesRTX 3080 10GB
Qwen3-30B-A3B30.5136.3 est.No51.4 est.NoRTX 3080 10GB
Qwen3-Coder-30B-A3B-Instruct30.5136.3 est.No51.4 est.NoRTX 3080 10GB
Qwen3-30B-A3B-Instruct-250730.5136.3 est.No51.4 est.NoRTX 3080 10GB
GLM-4.7-Flash31.2130.9 est.No49.4 est.NoRTX 3080 10GB
Phi-4-mini-instruct3.8127.3 est.Yes75.0 est.YesRTX 3080 10GB
Phi-4-mini-reasoning3.8127.3 est.Yes75.0 est.YesRTX 3080 10GB
gemma-3-4b-it4.3124.0 est.Yes73.1 est.YesRTX 3080 10GB
Qwen3-4B-Instruct-25074.0120.9 est.Yes71.3 est.YesRTX 3080 10GB
Qwen3-4B-Thinking-25074.0120.9 est.Yes71.3 est.YesRTX 3080 10GB

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 3080 10GBRTX 5060 8GB
Catalog models that fit17 of 6117 of 61
Largest exclusive fit——

RTX 3080 10GB details → · RTX 5060 8GB details →