New GPU stops working after few seconds

PCNoob33

Prominent
Apr 29, 2017
1
0
510
Ok so I got a new GTX 1060 today. When i turned my computer off i think i correctly unistalled the driver. I put the new card in, connected it up with a 6-pin connector, the fans on the card span for 2 seconds, then stopped and no display output. I put my old card back in, it works fine, (Note my old card is motherboard powered). When i put my old card in however it's like all the drivers were re-installed. I am upgrading a pre-built dell xps 8900 and it has a 450W, 'trustworthy' power supply. Could it be something to do with my BIOS or the drivers. Please help. Thanks