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Intel Arc B580 vs NVIDIA GeForce RTX 5070

For running models locally, priced in the UK. At 32k context the first runs 10 models fully in memory, the second 10.

In short

Both have 12 GB of memory for models; the Intel Arc B580 has 456 GB/s of bandwidth and the NVIDIA GeForce RTX 5070 672 GB/s. At 32k context both run the same 10 models we track fully in memory. On the models both run fully in memory, the NVIDIA GeForce RTX 5070 is about 1.8× as fast as the Intel Arc B580 (estimated, median across models). In the UK the Intel Arc B580 costs £323 at eBay and the NVIDIA GeForce RTX 5070 £695 at eBay: the Intel Arc B580 is £372 cheaper.

Updated . Speeds are estimates; how they are worked out.

Intel Arc B580

£323

eBay

Add to build
NVIDIA GeForce RTX 5070

£695

eBay

Add to build

Specifications

SpecIntel Arc B580NVIDIA GeForce RTX 5070
GPUArc B580GeForce RTX 5070
Memory12 GB GDDR612 GB GDDR7
Memory bus192-bit192-bit
Memory bandwidth456 GB/s672 GB/s
FP16 compute116.5 TFLOPS62 TFLOPS
SoftwareSYCL / oneAPICUDA
Board power190 W250 W
PCIe generationGen 4Gen 5
PCIe lanesx8x16

What each runs

Estimated decode speed with the most precise quant that fits each one est.

ModelIntel Arc B580NVIDIA GeForce RTX 5070
Gemma 4 12B21tok/sQ6_K39tok/sQ6_K
Qwen 3.5 9B21tok/sQ8_039tok/sQ8_0
DeepSeek R1 0528 Qwen3 8B21tok/sQ5_K_M39tok/sQ5_K_M
Qwen3 8B21tok/sQ5_K_M39tok/sQ5_K_M
Qwen 3.5 4B41tok/sQ8_074tok/sQ8_0
Ministral 3 8B22tok/sQ5_K_M39tok/sQ5_K_M
Granite 4.2 8B21tok/sQ4_K_M38tok/sQ4_K_M
Gemma 4 E4B25tok/sQ8_045tok/sQ8_0
LFM2.5 8B-A1B47tok/sQ8_094tok/sQ8_0
Llama 3.1 8B21tok/sQ6_K38tok/sQ6_K
Qwen 3.8 27Boffloadoffload
Qwen 3.6 27Boffloadoffload
Gemma 4 31Boffloadoffload
Qwen 3.6 35B-A3Boffloadoffload
Qwen 3.5 27Boffloadoffload
Gemma 4 26B-A4Boffloadoffload
Qwen 3.5 35B-A3Boffloadoffload
GLM 4.7 Flashoffloadoffload
Devstral Small 2 24Boffloadoffload
Nemotron 3.5 Lightning 30B-A3Boffloadoffload
gpt-oss 20Boffloadoffload
Kimi Linear 48B-A3Boffloadoffload
Qwen3 Coder 30B-A3Boffloadoffload
Qwen3 32Boffloadoffload
Gemma 3 27Boffloadoffload
Mistral Small 3.2 24Boffloadoffload
DeepSeek R1 Distill Qwen 32Boffloadoffload
Ministral 3 14Boffloadoffload
Qwen3 14Boffloadoffload
Phi-4 14Boffloadoffload
DeepSeek V4 Flashwon't runwon't run
GLM 5.3 Flashwon't runwon't run
Qwen 3.8 Flash Nextwon't runwon't run
MiniMax M2.7won't runwon't run
Qwen 3.5 122B-A10Bwon't runwon't run
Nemotron 3 Super 120B-A12Bwon't runwon't run
Qwen3 Coder Nextwon't runwon't run
gpt-oss 120Bwon't runwon't run
Mistral Small 4 119Bwon't runwon't run
GLM 4.5 Airwon't runwon't run
Qwen3 Next 80B-A3Bwon't runwon't run
Llama 3.3 70Bwon't runwon't run

Questions

Which is better for local AI, the Intel Arc B580 or the NVIDIA GeForce RTX 5070?
Choose the NVIDIA GeForce RTX 5070 for speed. Choose the Intel Arc B580 to spend less.
Which can run bigger models, the Intel Arc B580 or the NVIDIA GeForce RTX 5070?
At 32k context both run the same 10 models we track fully in memory.
Which is faster for local AI, the Intel Arc B580 or the NVIDIA GeForce RTX 5070?
On the models both run fully in memory, the NVIDIA GeForce RTX 5070 is about 1.8× as fast as the Intel Arc B580 (estimated, median across models).
What is the price difference between the Intel Arc B580 and the NVIDIA GeForce RTX 5070?
In the UK the Intel Arc B580 costs £323 at eBay and the NVIDIA GeForce RTX 5070 £695 at eBay: the Intel Arc B580 is £372 cheaper.

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