Hello, I have a Dell Optiplex 745 with a Pentium D running at 3.40 GHz with what i think is a 775 socket. I have 3gb DDR2 SDRAM. I don't know what my motherboard model is. I want to use my computer mainly for photo shopping pictures and some light gaming. I was thinking of upgrading the cpu to a core 2 duo but i'm not sure it's that simple. What kind of core 2 duo will fit my motherboard? Also what graphics card is good for my needs? the photo shop is just for pictures (mainly) and maybe some light video editing. Another thing i would like to know is if i can still keep the cpu and upgrade the gpu (currently i have none). Right now i have a budge of around $200. What would be the best possible road to upgrade my computer. I can't afford a new computer and i currently just have 100 dollars but by the end of the year i'll have the 200 dollars. Thank you for your help.