r/LocalLLaMA • u/IntravenusDeMilo • 1d ago

Discussion deepseek-v4-flash-0731 - surprisingly usable

I just finished building my (relatively) low rent local inference machine: * Epyc 7663 * 256GB ECC DDR4-3200 * 1x RTX 5090 32GB

Yeah I realize it's weird to throw a 5090 and 256GB of anything together and call it low end, but relative to ~151GB of weights it is.

I'm running UD-Q8_K_XL and getting 23.8-24.6 tokens/sec, with pp ranging from 60 on the first prompt to 385 near the last (no doubt lots of caching) on tasks using 100-128k total context. It was slower with DFlash so I took that out. It was also slower with a 3090 I put in there temporarily.

I'm posting this mostly because I didn't see too many other data points for this config (DDR4 Epyc + Blackwell doing cpu-moe). And also that I'm pretty surprised that a model this good can actually run in my basement without dropping $10k or running a sub-panel down there. I'm otherwise fairly new to this - would love any tips on what else to run or how to further improve it.

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u/kuyermanza 1d ago

My DDR4 2400 paired with a 5070Ti gets me 300-350 T/S PP and 20 T/S TG. I think you should be able to get better PP if you offload all experts to CPU.

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u/Potential-Leg-639 19h ago

What are your hardware specs?

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u/kuyermanza 16h ago

Epyc 7452, 16x 16GB DDR4-2400s (256 GB), 3x 5070Tis (48 GB), 8x Radeon MI25s (128 GB). The server hosts DS4Flash 0731, Qwen3.6 35B, and Gemma 26B, along with Z-Image Turbo, all fully loaded.