I can't indicate the graphic reference of the 4790k.
HD Graphics (Haswell) does not work. Team Cup
In addition, the 4790k is not recognized on the 3dmark site.
Processor is not recognized
The support told me to change my bios but nothing changes.
I believe that a 4790K had a HD 4600 iGPU, so that should let you submit to the correct category.
However, if updating the BIOS of your motherboard did not fix the "unknown" CPU issue, then the only other idea I have would be to make sure that the SystemInfo you have installed is the newest version.