So i took my pc to the garage for a clean and will doing so i found an Inductor on the HDD. It's a DR73-1R0.
Anyone know what part this could be from, im thinking my motherboard since it has a ferrite core but im not 100%.
My intuition is that the inductor is part of an LRC circuit associated with power switching to smooth out any spikes in instantaneous power when you switch the power on or off and/or with DC-to-DC conversion.
Mobo is most likely (probably near the header where you connect your case and/or at the power taps where you connect the power supply). Next most likely is the case itself (some kind of LRC circuit in the power switch?). While inductors are going to be found in your power supply, I don't know how it something that is likely to be so big can fall out of the power supply enclosure. Could also be part of a video card (especially PCI-E), if it has to step down the voltage used for the memory (I imagine that the GPU and GDDR run at different supply voltages). If it is on a PCI-E video card, it is still most likely to be close to where the power connector connects to the video card.
On the mobo, also consider looking near where ethernet and modem jacks connect to the board (overvoltage protection in case of lightning, etc.).