HELP! GELID Icy Vision Universal VGA Cooler Rev 2

Hey guys I need some help deciding if I should get this VGA cooler for some video cards.

I have a fairly new MSi Radeon HD 7770 (the one with 1 fan, not the power edition) and an old GTX 550 Ti Windforce which a friend gave me. I plan to put the cooler on both ones and I have a few questions that I hope gets answered.

Here is what the cooler is btw.


1. Should I keep the cooler that was on the 7770 already or switch to the new VGA cooler? I'm looking for lower temps over everything.

2. Are there any other alternatives to clean off the thermal paste without using isopropyl alcohol?

Thanks in advance!