Will re installing windows on a new motherboard delete hdd partitions?

Apr 21, 2014
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As I need to upgrade my motherboard I realise I will have to do a fresh install of windows 8.1, but as I have nearly 1tb of games I really don't want to re install all of them, I have a partition for all my games/apps but will these all be deleted by windows during the OS installation, also if not will I be able to simply recover them and have them in working condition?