|You didn't list your specs. We know you have a crappy Intel motherboard & the type of graphics card (no brand name though), but we have no idea what else you have - RAM, HDDs, any additional cards, & most importantly, the power supply.|
"The voltage is really more than enough"
You were asked about the wattage, not the voltage. Please post the make/model/wattage of your power supply, along with the amperage ratings on the +3.3v, +5v, & +12v rails. If you don't know, open the case & get the info off the label on the side of the PSU.
From your motherboard manual:
"If you install a PCI/PCI Express add-in card in your computer, the PCI/PCI Express
auto-configuration utility in the BIOS automatically detects and configures the
resources (IRQs, DMA channels, and I/O space) for that add-in card. You do not need to run the BIOS Setup program after you install a PCI/PCI Express add-in card."
There is nothing in the BIOS that needs to be changed. Just put the card in the slot, making sure it's fully seated, then connect the monitor cable to the card. That's it.