LoRA, DoRA, QLoRA: The Expert Stack #peft #finetuning #ai

Stop brute-forcing your model updates. If you're still trying to Full Fine-Tune 7B+ models on consumer hardware, you're fighting a losing battle against the VRAM Wall.In this breakdown, we move past the chaos of "Brain Surgery" (Full FT) and introduce the PEFT Sisterhood: the precision engineering stack that turns any generalist LLM into a domain expert on a single GPU. What’s inside the "Spice Box":LoRA (Low-Rank Adaptation): Why updating 0.1% of weights in A and B matrices beats rewriting the entire 16-bit model. DoRA (Weight-Decomposed LoRA): The 2026 meta. How separating Magnitude from D…