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Arc B570 10GB vs RTX 5090 32GB for Local LLMs

The RTX 5090 32GB has about 372% more memory bandwidth (1,792 vs 380 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 372% faster on the RTX 5090 32GB. The RTX 5090 32GB fits more of the catalog at Q4/8K — 38 vs 17 of 61 models (32 vs 10 GB VRAM). Largest model that fits the RTX 5090 32GB but not the Arc B570 10GB: Mixtral-8x7B-Instruct-v0.1 (46.7B). MSRP is $219 for the Arc B570 10GB vs $1,999 for the RTX 5090 32GB. 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 5090 32GB posts the higher tok/s in 38 rows vs 0. Methodology.

Spec comparison

Arc B570 10GBRTX 5090 32GB
VendorIntelNVIDIA
VRAM10 GB32 GB
Memory typeGDDR6GDDR7
Memory bandwidth380 GB/s1,792 GB/s
TDP150 W575 W
MSRP (list)$219$1,999
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)Arc B570 10GB tok/sArc B570 10GB fitsRTX 5090 32GB tok/sRTX 5090 32GB fitsWinner
Qwen3-0.6B0.8302.3 est.Yes1425.5 est.YesRTX 5090 32GB
gemma-3-1b-it1.0241.8 est.Yes1140.4 est.YesRTX 5090 32GB
Llama-3.2-1B-Instruct1.2201.5 est.Yes950.3 est.YesRTX 5090 32GB
Qwen3-1.7B2.0120.9 est.Yes570.2 est.YesRTX 5090 32GB
Qwen3-30B-A3B30.568.2 est.No380.1 est.YesRTX 5090 32GB
Qwen3-Coder-30B-A3B-Instruct30.568.2 est.No380.1 est.YesRTX 5090 32GB
GLM-4.7-Flash31.265.4 est.No380.1 est.YesRTX 5090 32GB
Qwen3-30B-A3B-Instruct-250730.568.2 est.No380.1 est.YesRTX 5090 32GB
Llama-3.2-3B-Instruct3.275.6 est.Yes356.4 est.YesRTX 5090 32GB
Phi-4-mini-instruct3.863.6 est.Yes300.1 est.YesRTX 5090 32GB
Phi-4-mini-reasoning3.863.6 est.Yes300.1 est.YesRTX 5090 32GB
gemma-3-4b-it4.362.0 est.Yes292.4 est.YesRTX 5090 32GB
Qwen3-4B-Instruct-25074.060.5 est.Yes285.1 est.YesRTX 5090 32GB
Qwen3-4B-Thinking-25074.060.5 est.Yes285.1 est.YesRTX 5090 32GB
gpt-oss-20b21.5104.5 est.No282.5 measuredYesRTX 5090 32GB

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

Arc B570 10GBRTX 5090 32GB
Catalog models that fit17 of 6138 of 61
Largest exclusive fit—Mixtral-8x7B-Instruct-v0.1 (46.7B)

Arc B570 10GB details → · RTX 5090 32GB details →