I need a driver for my ethernet port on my intel core i7 4790k motherborad can anyone help me please?
You need the driver for your motherboard, not your processor.
Specify your adapter model number, or contact your motherboard manufacturer.
I have a product code for my motherboard which I can provide product number is 26880806989MBOIPOAO40330
Who made your board? That code means nothing here.
Since we can go back and forth on this information request, do this: Download, run, and ATTACH (via the paperclip) the results of this utility:
With this information, we can identify what you have.
For more complete information about compiler optimizations, see our Optimization Notice.