HP has their motherboards made to the specifications. Therefore, they are not necessarily the same as a retail board. Using the case for a retail board may not work. The holes in the motherboard may not match the stand-offs in the case. Also, the front connectors in the case don't always match those on the board.
Most importantly, the i7-9700F can not be overclocked. It doesn't have an unlocked multiplier. The model with the unlocked multiplier has a K (i7-9700K). There are numerous articles online that you can read to see the difference.
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