I have a dell optiplex 755 mt and im looking to put in a better graphics card i want the best one i can put in it without modifying anything i was looking at the msi 1050ti low profile but im skeptical about it fitting in my case then i seen the zotacs how they go down in size to like the minis and the oc edition heres the link to them that im looking at https://www.amazon.com/ZOTAC-GeForce-DisplayPort-128-bit-ZT-P10510A-10L/dp/B01M27X994?th=1&psc=1 what do you guys think?let me know also ive done some research about the processor for this system and i seen since dell updated the bios to the a22 witch was in 2012 that the cpu can be upgraded beyond the core 2 quad q6700 that you can go to the q9650 at 3.0ghz but also read that i need a copper heat sink can i just use what i have witch it was the aluminum heatsink let me know thanks