What hardware can I upgrade with Windows 7 OEM?

CTB98600

Honorable
Nov 9, 2013
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10,510
I currently have a custom build running Windows 7 OEM and I am wondering all the possible hardware I can upgrade. My goal is to eventually upgrade my CPU, GPU, and RAM if possible. I also have an OEM hard drive if that makes any difference.

Thanks in advance!
 
Solution
due to the OEM license agreement you can upgrade everything but the motherboard.

the Windows Product Key is connected to the motherboard