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RTX 5080 16GB vs RTX 6000 Ada 48GB for Local LLMs

Both list the same memory bandwidth (960 GB/s), so per-token decode speed should be similar whenever a model fits both. The RTX 6000 Ada 48GB fits more of the catalog at Q4/8K — 39 vs 25 of 61 models (48 vs 16 GB VRAM). Largest model that fits the RTX 6000 Ada 48GB but not the RTX 5080 16GB: Qwen3-Coder-Next (79.7B). MSRP is $999 for the RTX 5080 16GB vs $6,800 for the RTX 6000 Ada 48GB. 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 (44 shared models), the RTX 5080 16GB posts the higher tok/s in 13 rows vs 9. Methodology.

Spec comparison

RTX 5080 16GBRTX 6000 Ada 48GB
VendorNVIDIANVIDIA
VRAM16 GB48 GB
Memory typeGDDR7GDDR6
Memory bandwidth960 GB/s960 GB/s
TDP360 W300 W
MSRP (list)$999$6,800
BuyNVIDIA GeForce RTX 5080 Founders Edition (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 44 shared models

ModelParams (B)RTX 5080 16GB tok/sRTX 5080 16GB fitsRTX 6000 Ada 48GB tok/sRTX 6000 Ada 48GB fitsWinner
Qwen3-0.6B0.8763.6 est.Yes763.6 est.YesTie
Qwen3-Next-80B-A3B-Instruct81.369.4 est.No624.8 est.NoRTX 6000 Ada 48GB
gemma-3-1b-it1.0610.9 est.Yes610.9 est.YesTie
Llama-3.2-1B-Instruct1.2509.1 est.Yes509.1 est.YesTie
Qwen3-30B-A3B30.5440.9 est.No203.6 est.YesRTX 5080 16GB
Qwen3-Coder-30B-A3B-Instruct30.5440.9 est.No203.6 est.YesRTX 5080 16GB
Qwen3-30B-A3B-Instruct-250730.5440.9 est.No203.6 est.YesRTX 5080 16GB
GLM-4.7-Flash31.2423.2 est.No203.6 est.YesRTX 5080 16GB
Qwen3-1.7B2.0305.5 est.Yes305.5 est.YesTie
gpt-oss-20b21.5204.9 measuredYes169.7 est.YesRTX 5080 16GB
Qwen3-Coder-Next79.772.1 est.No203.6 est.YesRTX 6000 Ada 48GB
Llama-3.2-3B-Instruct3.2190.9 est.Yes190.9 est.YesTie
Mistral-7B-Instruct-v0.37.2163.6 measuredYes166.6 measuredYesRTX 6000 Ada 48GB
Phi-4-mini-instruct3.8160.8 est.Yes160.8 est.YesTie
Phi-4-mini-reasoning3.8160.8 est.Yes160.8 est.YesTie

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 5080 16GBRTX 6000 Ada 48GB
Catalog models that fit25 of 6139 of 61
Largest exclusive fit—Qwen3-Coder-Next (79.7B)

RTX 5080 16GB details → · RTX 6000 Ada 48GB details →