XPS 8930, Corsair Vengeance ram upgrade?

@ZoferVFX You didn't mention what CPU you have but the max. memory speed is 2400 MHz for an i3 processor and 2666 MHz for an i5/i7/i7K processor. If you check compatibility here: https://www.corsair.com/us/en/Categories/Products/Memory/c/Cor_Products_Memory?type=systems&systemsSelection=6565&manufacturerSelection=Dell&systemModelSelction=XPS%208930&maxModule=8&minModule=1&maxCapacity=128&minCapacity=2&page=2&sort=popular&view=listView&filters=

it does not list your memory probably because of the 3200 MHz speed. You should check the technical. specs of your memory to determine what the SPD (Serial Presence Detect) speed is.  Most likely the 3200 MHz is the XMP (Extreme Memory Profile) speed and the SPD speed is 2666 Mhz, and Dell motherboards do not use XMP. If you look at the compatible 2666 MHz Corsair memory you will see the SPD is only 2133 MHz, so if you put that memory in your system you will only get 2133 MHz memory speed. If you want guaranteed compatible memory you should look at crucial.com