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Can I run Sharp-Spark-X2.5-4B-GGUF on an RTX 5070?

Yes

Its Q6_K_XL file (3.61 GB) fits in the 10.8 GB an RTX 5070 can use, with room for ≈ 189K tokens of context.

Full analysis of Sharp-Spark-X2.5-4B-GGUF Everything that runs on RTX 5070 Get the Q6_K_XL file on Hugging Face
ollama run hf.co/peculiar-ragdoll/Sharp-Spark-X2.5-4B-GGUF:Q6_K_XL

Files and context on RTX 5070

Each file of Sharp-Spark-X2.5-4B-GGUF (and of GGUF versions the site has analyzed), and how much context fits next to it, with the context cache in 16-bit or 8-bit.

FileSizeOn RTX 5070 Context (16-bit)Context (8-bit)
Q6_K_XL3.61 GBFits189K379K
Q5_K_XL3.25 GBFits199K399K
Q4_K_XL2.68 GBFits214K429K

Sharp-Spark-X2.5-4B-GGUF on other hardware

Popular models that run on RTX 5070

Assumes 90% of the card's memory is usable and at least 4K tokens of context for one conversation, with the context cache in 16-bit unless noted. Fits leaves at least 20% of that memory for context; Tight leaves less.