It's not the ram, it's the graphic card you could build this level with only 16Mb ram (when u hav a better graphic card) but that takes more time. Wich craphic card is in your laptop ?
Yes i understand you your first time, it's about my video graphic card. My Labtop comes with only 32 MB video card, and my other PC have a 128 MB for vedio card,
Graphics always need high performance and good acceleration.