The PSU supplies multiple STANDARDIZED DC voltages (listed across the top of the table) to a computer. MOST of the time the only number you (as an end user) care about is the +12V number. The other voltages are generally used for powering the 24 pin plug and almost any PSU can handle those requirements. The +12V amperage (shown with the "A") and the wattage (shown with "W") help guide you for GPU and overclocking. But what that table DOES NOT show is the cabling that your Seasonic PSU has. That is as important as wattage. High overclocking motherboards have started having more than just an 8 pin supplemental CPU power plug. GPUs use 6 and/or 8 pin PCIe plugs. If this PSU only has 6 pin PCIe power plugs, you don't want to buy a GPU that REQUIRES an 8 pin because you will have to kludge the power. So wattage, connectivity and quality/reputation should go into a PSU choice.