Hi, just bought a kühler h2o 620 few weeks back, but i can't get my i5 2500k to run at 5 ghz 1.400v under 75c. Was wondering if it is possible to cut the line that go's into the water-block, send it to another radiator, then back to the water-block? Will i need another pump?
Yes, you can do this...many people have. The pump itself is integrated into the waterblock so you could reuse this. However, if you have the budget for a bigger radiator and new pump, you are better off just going with an entirely new loop. It would perform better.