1 Copper

Precision 5810 graphic card compatibility?

HEllo, I have a Dell 5810. with k620card/

I have this card: MSI Geforce GTX 1660 Super - VENTUS XS OC - 6 Go.

But When i plug it an turn on my pc I have this message:

please power down and connect the pcie power cable for this graphics card

I have connected 6 pins extension

PCi port on mother board is 75w+225w ext

For my card I need 125W.

Can you help me?

Many Thansk.