Installing a DDR5 graphics card into a ddr3 motherboard

I have an 8 pin that can be converted to 6 along with the 6 pin. I talked to a friend of mine and he said the computer tech split his 8 pin into 2 6 pins and that is what the graphics card came with. I test fitted everything and no the 8 pin can't be easily separated, it would need to be converted to a 6. Will 550 watts be enough as well? I am not accustomed the the abbreviations:

What psu exactly? Not a fan of psu adapters, but if the gpu takes two 6-pin and your psu has one six and one eight then converting the 8 to 6 should work. Check the 8 close - is it a 6+2 that can be separated?

Edit: best thing to remove old driver is DDU in safe mode.

Click to expand...

What is DDU safe mode, sorry I am new to all of this.

I did as you said. I had a friend explain why I would have to run this in safe mode. Basically you want all remnants of the old drivers gone, because your p.c. will still be looking for the old graphics card. At what point do I put in the new graphics card then?

Could you be more precise in the steps? Please correct me if I am wrong.

1. DDU uninstaller in safemode, found the link download and run in safemode
2. power down, put in new graphics card put on adapter on the 8 pin to convert it to six pin, plug in that and the regular six pin to the graphics card after seating it and screwing it fast
3. power up the pc, the pc should recognize the new card since the old graphics drivers are gone.
What happens if the pc doesn't recognize the new card? And what is the minimum power supply needed for this card? A friend of mine told me if the current power supply isnt enough to get an external one for the graphics card.
Am I missing anything. I can list my rig if needed as well.

1. rosewell 550 watt power supply
2. upgrading from an amd hd 5570 to a N580GTX Twin Frozr II
3. AMD Phenom II X4 965 Black Edition (ddr3)
Computer
Computer Brand Name: Unknown on Noname

Motherboard
Motherboard Model: ASUS M4A88TD-V EVO/USB3
Motherboard Chipset: AMD RS880 + SB810/SB850
Motherboard Slots: 3xPCI, 2xPCI Express x1, 1xPCI Express x16
PCI Express Version Supported: v2.0
USB Version Supported: v3.0

BIOS
BIOS Manufacturer: American Megatrends
BIOS Date: 07/08/11
BIOS Version: 2001
AMD AGESA Version: 0.7.3
UEFI BIOS: Not Capable

Super-IO/LPC Chip: ITE IT8721F/DX

I hope giving you all the information allows you to help me better,

Thank you.