When attached to a motherboard's PCIe x16 slot, a card such as the GeForce RTX 4080 can draw up to 75W from the +3.3V and +12V rails (3.3V x 3A + 12V x 5.5A). This is the maximum amount specified ...

To ensure that it was a direct CPU comparison, a PCIe x16 riser card was used to attach the 980 PRO SSDs on both the Intel and AMD systems, although the model of the riser card hasn't been disclosed.