Running Gemma 4 e4b (9.6GB RAM req) on RPi 5 8GB! Stable 2.8GHz Overclock & Custom Cooling

Running Gemma 4 e4b (9.6GB RAM req) on RPi 5 8GB! Stable 2.8GHz Overclock & Custom Cooling

Finally got the Gemma 4 (E4B) model running on my Raspberry Pi 5 (8GB). Since the model requires about 9.6GB of RAM, I had to get creative with memory management.

The Setup:

Raspberry Pi OS.

Lexar SSD (Essential for fast Swap).

Memory Management: Combined ZRAM and RAM Swap to bridge the gap. It's a bit slow, but it works stably!

Overclock: Pushed to 2.8GHz

(arm_freq=2800) to help with the heavy lifting.

Thermal Success:

Using a custom DIY "stacked fan" cooling rig. Even under 100% load during long generations, temps stay solid between 50°C and 55°C.

It's not the fastest Al rig, but seeing a Pi 5 handle a model larger than its physical RAM is amazing!

submitted by /u/AncientWin9492
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