Can I run Spark-X2.5-4B-GGUF on an RTX 5090?

Yes

Its Spark-X2.5-4B file (8.23 GB) fits in the 28.8 GB an RTX 5090 can use, with room for ≈ 543K tokens of context.

Full analysis of Spark-X2.5-4B-GGUF Everything that runs on RTX 5090 Get the Spark-X2.5-4B file on Hugging Face

ollama run hf.co/XHToken/Spark-X2.5-4B-GGUF

Files and context on RTX 5090

Each file of 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.

File	Size	On RTX 5090	Context (16-bit)	Context (8-bit)
Spark-X2.5-4B	8.23 GB	Fits	543K	1M
Q8_0	4.38 GB	Fits	646K	1M
Q4_K_M	2.60 GB	Fits	693K	1M

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

NVIDIA H100Yes
RTX 5090Yes
RTX 4090Yes
RTX 3090Yes
RTX 5060 Ti 16 GBYes
RTX 3060 12 GBYes
RTX 4060Yes
Mac with 32 GBYes
Mac with 64 GBYes
Mac with 128 GBYes

Popular models that run on RTX 5090

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tiny-Qwen2ForCausalLM-2.5trl-internal-testing · 2.44M
Qwen3-8BQwen · 8.19B
Qwen3-Coder-30B-A3B-Instruct-GGUFunsloth · 30.5B
Qwen2.5-7B-InstructQwen · 7.62B
Qwen3.5-9BQwen · 9.65B

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.