Hector Gras
Founder of GreenCube
I build GreenCube, the AI you own: it runs on your own PC, with no limits.
I also test how AI really runs on real machines, from cheap 8 GB laptops to gaming PCs. Every number on this blog comes from those tests: what we measured, on which PC, and when. When a new result comes in, the post gets updated.
Questions or a PC we should test? Write to support@greencube.app.
My tests
Can my PC run AI? We measured 10 real gaming PCs and laptops
Real speeds on 10 gaming PCs and laptops.
Gemma 4 requirements: what PC you need to run it locally
From an 8 GB laptop to a gaming PC: which Gemma 4 fits yours.
AI to study from a PDF: we asked 12 questions about 3 long documents
Right 11 times out of 12, in about 15 seconds per question.
ChatGPT free limits in 2026: is it unlimited now?
ChatGPT chat is unlimited now. PDFs and pictures aren’t.
Local AI image generator on your PC: how long one picture takes
From 28 seconds to 11 minutes, depending on your PC.
How much VRAM do you need for AI? Why the model must fit on your GPU
Spill out of VRAM and it gets 6 times slower.
Run AI on a laptop without a graphics card: do Intel graphics help?
Chat: about the same. Pictures: 4 times faster.
Gemma 4 E2B vs E4B on a laptop: small vs big AI model, measured
Small: 20 seconds. Big: 112. Here's what you lose.
Can you run AI with 8 GB of RAM? We tried the weakest laptop we have
Yes, slowly. The catch is free memory, not speed.