aireyean :
https://drive.google.com/file/d/0BxShVauO_SCnbkxHR3M3UXAyTHZPUV9qbEk2RTFYU0dRUjdB/view?usp=sharing
I got a rx480 today and it won't display. Do I have to connect the power supply in this spot even though inserting it in the motherboard turns the card on and fans work?
I dont have any wires to connect there so will that result in buying a new power supply?
In addition to the words of wisdom offered I thought I could offer a bit of clarity about the why behind the what which is the PSU.
You said
even though inserting it in the motherboard turns the card on and fans work
Why does the card work but not really?
The PCIe slot that accepts the GFX card has 75W of power to offer its resident. Should its resident need more food it has to look to PCIe supplementary power cables. When we look to its appetite
http://www.guru3d.com/articles-pages/amd-radeon-r9-rx-480-8gb-review,5.html it does need more than 75W which means cables are necessary and required. Connect a 6 pin PCI cable and you will only be offering it up to 150W total which is less than what it needs. Step up the cable to an 8 pin and you are now offering the card an additional 150W of power which means the card will have access to up to 225W, which well exceeds its 166W need, which means you need an 8 pin supplementary power cable. WIthout that 8 pin cable you will have a card which has enough power for fans and light(s) but for it to fully perform its duties it needs help.
In short
PCIe slot - 75W
6 pin PCIe supplementary power cable 75W
8 pin PCIe supplementary power cable 150W
The aforementioned G550W will power your card with ease. I don'ty think OC'ing is on the table at the moment but that card offers you enough headroom to do just that. The next question is how long will it be before you upgrade your GFX card and what will it be? Do you want to buy another PSU when that upgrade comes or do you want to invest in some longevity? Should you want to invest in some longevity I recommend
https://www.newegg.com/Product/Product.aspx?Item=N82E16817438054 . In addition to its Gold certification for its electrical efficiency it is also fully modular. That means you only connect the cables you need which reduces the amount of cables under the motherboard(thanks to Capt. Obvious
😀) which means a cleaner/neater build. With a 7 year warranty behind the PSU it should quite easily last through a couple more builds.