What is the difference in them and which is better
EVGA GeForce GTX 970 4GB Superclocked ACX 2.0
Gigabyte GeForce GTX 970 4GB WINDFORCE 3X Video Card
Do I need a cooler for the superclocked one
EVGA GeForce GTX 970 4GB Superclocked ACX 2.0
Gigabyte GeForce GTX 970 4GB WINDFORCE 3X Video Card
Do I need a cooler for the superclocked one