Hi, I'm new to the forum but not to the world of macs. I followed the forum a long time but never ended up making an account because they were usually only for research related to doubts and always found help reading the posts. Thank you very much for this !!! This week I had the happiness of finding a MDD 1.25, here in Brasil are almost impossible to find and I was very happy with it. It came with a Cinema Display CRT 17 and with the keyboard pro, I do not know if it is original of the time, it came without a mouse but I already managed to find one in good condition that arrives in a few days. Basically it was never opened, never made an upgrade, it only has 512mb origial and 160gb hd, OSX was installed 10.3, but I upgraded to 10.5.8. My first research was in reaction to the upgrades available nowadays (2017), I discovered an interesting upgrade to the video card, but I would not use the CRT because of the ADP connector, the original card is an ATI 9000, and a friend gave me many years ago a computer that had a 7800GS, which literally was in some corner in house, because it is outdated to use today, imagine my reaction to the unlikely happening ... I read in the forum and I looked for information on how to proceed to flash the video card, plug the pins, etc ... etc .. Well summing up it worked, and everything went well. But after replacing the video card I noticed that the osx takes a long time to boot and it's on a blue screen, but I installed OSX before with the ati and then I changed the card, and I did not redo the OSX again. (but works) normally, just take a long time to boot. I'll try reinstalling Leopard again to see if it will work. To solve the CRT connection problem, I am thinking of buying the A1006 DVI to ADP adapter. But I'm looking for a Cinema LCD Display for future upgrade. This is my third mac, the first was a green iMac G3 '97, which I regret having sold ... then a MacBook Core Duo ... which helped me a lot, this one also sold, and this was a find here, A model I've always wanted. Well that's it, I would like to thank all the forum information and the people who help each other. Sorry for the long story !!! Well my doubts are as follows: I plan to upgrade to SATA by reading the files I saw that there is a possibility of flashing on a Pci drive with Sil3112 chipset, ok I found the card and bought it, it arrives in a few days. My idea at the beginning is to replace the original HDD with a 120GB SSD and a 2tb HD, both of which I have in a drawer here and i do not use it. The video card upgrade has already been done and works normally. I bought a 2.0 usb card with Nec chipset, apparently has compatibility with OSX, the purpose is to have a faster connection and to pass files on pendrive. One issue would also be a memory upgrade, I tried to use some i have here, all 512mb ddr333, total 2GB. When I installed OSX, I got an installation error from "Essentials", I read in the forum that it could be the memories, I took all the extras and left with only the original , and installed. I wanted to know if this compatibility problem really exists, if I need to look for original Crucial ones Thank you!!!