Water/Liquid Cooling Questions. (Or other quiet options)

I would strongly advise against that, modifying a hole that large often reduces the structural integrity of a case, and the airflow is only of any use if it is balanced, and it won't be unless you have both a rear and a top fan of at least 120mm size, or multiple rear fans.

 

Well since i have a Aspire X Super Alien Server Tower case, I'm all covered with fans. One on top, two in front, two at the back, and one on the side. Its just that now since its cooler outside, my VGA card started overheating (showing artifacts and missing textures in games) because the AC isnt on anymore. And also It had a lot of dust in the fins, so i took it apart and cleaned it. Put it back together and it helped a little. I even set the fan to 100% when gaming, and it still shows a few artifacts here and there. I dont want to get a aftermarket fan, cause I did that before with my other VGA card, bad experience, won't do that again. So i want to eliminate a few fans, these being the loudest ones, and go for a "sorta" silent liquid cooling setup. I already got the EK Full Cover Water Block for my ATI HD3870, i just need the rest of the parts. Any suggestions on which parts should i get. I need everything except the VGA water block. Thanks guys.

 

Then either your case is very badly designed or something is wrong with your graphics card, 4870s don't overheat by themselves, I use very low speed case fans and my card ran plenty cool enough when I owned one. Adding a waterblock to the card may cause you warranty issues.