umm no the nvidia does have a fan... I have one... I took pictures of it...Noise as in sound levels? If so, the ATI is significantly more noisy from all reports, as it has active cooling and intakes and vents to the outside. The nVidia card is passively cooled--no fans--so it's perfectly quiet. Check Tom's Hardware's review of the 4870 for a noise level comparison with various other cards, and IIRC, a decibel reading of the 4870 fans.