Modern PCs can easily consume upwards of several hundred watts of power to push as many frames as possible. With this power, ...
Depending on what type of hsf you have... Some hsf are set so that the fan is blowing away from the heat sink, however most are set up so that the fan is blowing directly towards the sink.
It's easy to think that the CPU or graphics card are the beating heart of your gaming PC, but they wouldn't get very far without sufficient cooling - unless you want a very expensive and ineffective ...