Greetings @Gauserrr
Looking at the PowerSpec 850GFM, and the PowerSpec 750GSM they are not interchangeable. Looks like the 850GFM has the PCIE pinned per spec. The 750GSM has it pinned on the PSU with an extra 12V, that is not connected on the cable. You'll notice on the 750GSM, that the pin on the top right on the end connecting to the power supply, is not connected.
The 850W should have included 2x2 6+2. We can get you a replacement cable. Are you near the store where you purchased this?
@Gauserrr
Inventory shows they have two additional on hand. If they have it, I'm sure they can exchange the accessory package for you and verify the additional cable is there. I'd bring your power supply in with you, just in case.
Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.
Submit photos and a description of your PC to our build showcase
See other custom PC builds and get some ideas for what can be done
Services starting at $149.99