← AI Hashrate

RTX 3090 24GB vs RTX 6000 Ada 48GB for Local LLMs

The RTX 6000 Ada 48GB has about 3% more memory bandwidth (960 vs 936 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 3% faster on the RTX 6000 Ada 48GB. The RTX 6000 Ada 48GB fits more of the catalog at Q4/8K — 39 vs 33 of 61 models (48 vs 24 GB VRAM). Largest model that fits the RTX 6000 Ada 48GB but not the RTX 3090 24GB: Qwen3-Coder-Next (79.7B). MSRP is $1,499 for the RTX 3090 24GB 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 (47 shared models), the RTX 6000 Ada 48GB posts the higher tok/s in 41 rows vs 6. Methodology.

Spec comparison

RTX 3090 24GBRTX 6000 Ada 48GB
VendorNVIDIANVIDIA
VRAM24 GB48 GB
Memory typeGDDR6XGDDR6
Memory bandwidth936 GB/s960 GB/s
TDP350 W300 W
MSRP (list)$1,499$6,800
BuyMSI GeForce RTX 3090 Ventus 3X 24G OC (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 47 shared models

ModelParams (B)RTX 3090 24GB tok/sRTX 3090 24GB fitsRTX 6000 Ada 48GB tok/sRTX 6000 Ada 48GB fitsWinner
Qwen3-0.6B0.8744.5 est.Yes763.6 est.YesRTX 6000 Ada 48GB
Qwen3-Next-80B-A3B-Instruct81.3152.3 est.No624.8 est.NoRTX 6000 Ada 48GB
gemma-3-1b-it1.0595.6 est.Yes610.9 est.YesRTX 6000 Ada 48GB
Llama-3.2-1B-Instruct1.2496.4 est.Yes509.1 est.YesRTX 6000 Ada 48GB
Qwen3-1.7B2.0297.8 est.Yes305.5 est.YesRTX 6000 Ada 48GB
Qwen3-30B-A3B30.5198.5 est.Yes203.6 est.YesRTX 6000 Ada 48GB
Qwen3-Coder-30B-A3B-Instruct30.5198.5 est.Yes203.6 est.YesRTX 6000 Ada 48GB
GLM-4.7-Flash31.2198.5 est.Yes203.6 est.YesRTX 6000 Ada 48GB
Qwen3-30B-A3B-Instruct-250730.5198.5 est.Yes203.6 est.YesRTX 6000 Ada 48GB
Qwen3-Coder-Next79.7158.2 est.No203.6 est.YesRTX 6000 Ada 48GB
Llama-3.2-3B-Instruct3.2186.1 est.Yes190.9 est.YesRTX 6000 Ada 48GB
gpt-oss-20b21.5161.8 measuredYes169.7 est.YesRTX 6000 Ada 48GB
gpt-oss-120b120.441.3 est.No169.3 est.NoRTX 6000 Ada 48GB
Mistral-7B-Instruct-v0.37.270.0 measuredYes166.6 measuredYesRTX 6000 Ada 48GB
Phi-4-mini-instruct3.8156.7 est.Yes160.8 est.YesRTX 6000 Ada 48GB

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 3090 24GBRTX 6000 Ada 48GB
Catalog models that fit33 of 6139 of 61
Largest exclusive fitQwen3-Coder-Next (79.7B)

RTX 3090 24GB details → · RTX 6000 Ada 48GB details →