H50 is kinda almost watercooling. Weak block for transferring heat, very small rad. It's all about physics. You still need to remove heat by air cooling over the fins in the air cooler or the radiator.
The H50 is proven to be less capable than a top air cooler. It's not real watercooling. Real watercooling costs MUCH more, because the radiator, pump, block is quality. The H50 isn't quality. Seen many learn this important lesson. You just did. Much info on the web on how you can make the H50 better. Mainly massive push/pull fans. Not enough, ahh well....Save your pennies, $150 min is a good start. This is a almost weak real watercooling setup, okay rad (not great), almost great pump/res setup. Decent block. Still a...