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NVIDIA GeForce RTX 3080 10GB vs NVIDIA GeForce RTX 5070

For running models locally, priced in the UK. At 8k context the first runs 10 models fully in memory, the second 13.

In short

The NVIDIA GeForce RTX 5070 has more memory for models: 12 GB against 10 GB. At 8k context the NVIDIA GeForce RTX 5070 runs 13 of the models we track fully in memory and the NVIDIA GeForce RTX 3080 10GB 10; only the NVIDIA GeForce RTX 5070 holds Qwen3 14B. On the models both run fully in memory, the NVIDIA GeForce RTX 3080 10GB is about 1.4× as fast as the NVIDIA GeForce RTX 5070 (estimated, median across models). In the UK the NVIDIA GeForce RTX 3080 10GB costs £466 at eBay and the NVIDIA GeForce RTX 5070 £695 at eBay: the NVIDIA GeForce RTX 3080 10GB is £229 cheaper.

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

NVIDIA GeForce RTX 3080 10GB

£466

eBay

Add to build
NVIDIA GeForce RTX 5070

£695

eBay

Add to build

Specifications

SpecNVIDIA GeForce RTX 3080 10GBNVIDIA GeForce RTX 5070
GPUGeForce RTX 3080 10GBGeForce RTX 5070
Memory10 GB GDDR6X12 GB GDDR7
Memory bus320-bit192-bit
Memory bandwidth760 GB/s672 GB/s
FP16 compute59.5 TFLOPS62 TFLOPS
SoftwareCUDACUDA
Board power320 W250 W
PCIe generationGen 4Gen 5
PCIe lanesx16x16

What each runs

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

ModelNVIDIA GeForce RTX 3080 10GBNVIDIA GeForce RTX 5070
Gemma 4 12B53tok/sQ5_K_M41tok/sQ6_K
Qwen 3.5 9B61tok/sQ6_K42tok/sQ8_0
Ministral 3 14Boffload38tok/sQ5_K_M
Qwen3 14Boffload40tok/sQ4_K_M
DeepSeek R1 0528 Qwen3 8B59tok/sQ6_K42tok/sQ8_0
Qwen3 8B59tok/sQ6_K42tok/sQ8_0
Phi-4 14Boffload39tok/sQ4_K_M
Qwen 3.5 4B98tok/sQ8_087tok/sQ8_0
Ministral 3 8B58tok/sQ6_K41tok/sQ8_0
Granite 4.2 8B53tok/sQ6_K39tok/sQ8_0
Gemma 4 E4B56tok/sQ8_049tok/sQ8_0
LFM2.5 8B-A1B228tok/sUD-Q6_K170tok/sQ8_0
Llama 3.1 8B61tok/sQ6_K54tok/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
Mistral Small 3.2 24Boffloadoffload
Gemma 3 27Boffloadoffload
DeepSeek R1 Distill Qwen 32Boffloadoffload
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 NVIDIA GeForce RTX 3080 10GB or the NVIDIA GeForce RTX 5070?
Choose the NVIDIA GeForce RTX 5070 to run bigger models. Choose the NVIDIA GeForce RTX 3080 10GB for speed. Choose the NVIDIA GeForce RTX 3080 10GB to spend less.
Which can run bigger models, the NVIDIA GeForce RTX 3080 10GB or the NVIDIA GeForce RTX 5070?
At 8k context the NVIDIA GeForce RTX 5070 runs 13 of the models we track fully in memory and the NVIDIA GeForce RTX 3080 10GB 10; only the NVIDIA GeForce RTX 5070 holds Qwen3 14B.
Which is faster for local AI, the NVIDIA GeForce RTX 3080 10GB or the NVIDIA GeForce RTX 5070?
On the models both run fully in memory, the NVIDIA GeForce RTX 3080 10GB is about 1.4× as fast as the NVIDIA GeForce RTX 5070 (estimated, median across models).
What is the price difference between the NVIDIA GeForce RTX 3080 10GB and the NVIDIA GeForce RTX 5070?
In the UK the NVIDIA GeForce RTX 3080 10GB costs £466 at eBay and the NVIDIA GeForce RTX 5070 £695 at eBay: the NVIDIA GeForce RTX 3080 10GB is £229 cheaper.

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