Hello, I'm new to this forum,and fairly new to Macs as well. I have a Powermac AGP 400mhz,1G Sdram,120hdd that used a 16mb Rage 128 Pro card. This card stuttered at full screen viewing of some newer programs and won't run others at all. This Powermac model runs Tiger 10.4.11 without a hitch otherwise. I love this old machine and want to keep it going since it's been problem free from day one. On a hunch and somewhat desperate I installed the ATI 9000 64mb card from my MDD 1.25 DP into the AGP even though I doubted the slow processor speed of the Powermac AGP would handle this card. Surprisingly it works fine. So that leaves me with having to upgrade the video card in my MDD 1.25 Dp. I have a line on a Nvidia 4 Ti 128. This card was offered as an option to the standard ATI 9000 64mb that were installed on most MDD's. Is it much of an improvement,or do I have even better options for my MDD? I appreciate any advice and help you can offer. Thank you.