CPU Temp Help

I have an AMD FX 8320 CPU on ASRock Fatality 990 FX Killer Motherboard with a Hyper 212. I am currently using the stock thermal paste. first I installed the stock cooler for 2 days and then took it to a shop to make them install the 212. I don't know how well they cleaned the old thermal paste or the method to install the new thermal paste. My CPU currently runs at 4.2 Ghz on stock voltages. My idle temps are fine but on load before overclock it was at 65c and after overclock it is at 69c while Prime 95 but 72c after playing Bioshock Infinite for an hour in HWMonitor. No other games reach that temp. At that temp it starts to throttle. I have ordered an Arctic Silver 5 Thermal Paste. Was that a bad choice ? Does AS5 come with any thermal paste cleaner ? If not I will buy one. Will that reduce my temps and if yes by how much ? I currently use a Push Pull config and I just wanted to avoid the throttling. That's all and also is the issue which I am facing normal ? Here's the link to a screenshot of HWMonitor after an hour playing Bioshock Infinite and also my GPU is also overclocked. Thanks in advance.
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    First of all, you do not need a thermal paste cleaner. Even a dry q-tip or cloth will work, or rubbing alcohol if absolutely needed.

    The thermal paste that came with your cooler might not be the best, but it's not bad and the type you use will not make any dramatic difference in your temps. The problem may be the way it was applied, if it was at all. Who knows what these guys did that installed this cooler for you.

    Remove your cooler and clean off the old paste from both the cooler and your cpu. Reapply new paste by either applying a pea sized amount on the center of your cpu or spreading a very thin layer onto it evenly. Too much is a bad thing and can trap excess heat. It is intended to fill slight gaps between your cpu and cooler, not be an extra layer between, if that makes sense to you. Reinstall your cooler and connect your fans.

    Let us know if this solves your issues.
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