Graphics card installation help

[WaDaFack]

I just got a new graphic card (ATI Radeon HD4350 Series), I installed it but I think I forgot something.
When I opened my computer, you have those 3 strips, 1 black, 2 white. The black one is where you put your graphic card, right? Well, there was another thing on one of the 2 white plugins. Is that a graphic card and was I supposed to remove it?

Another problem is, when I did put my graphic card in and update my drivers, my sound all of the sudden stopped working. I don't think I have a sound card unless the card on the white plugin is it, but other than that the device manager lists
-Audio Codecs
-Legacy Audio Drivers
-Legacy Video Capture Devices
-Media Control Devices
-USB Audio Devices
-Video Codecs

than when I check Control Panel > Sounds and Audio, it says I have nothing connected.
I normally use my Insignia Speakers which are correctly plugged in etc.
Blah, I'm not a computer wiz!
Thanks to anyone who helps.

 

[KyBrewer]

Did you have a graphics card before, or were graphics integrated (part of the motherboard)? I assume by you saying you updated the drivers, your computer recoginized that you installed the card? Or did you possibly update drivers for integrated graphics & sound?

This card plugged into the white slot...is there a cable from your monitor to that card? Do you know what model your motherboard is?

 

[Ritwik7]

We need more information regarding your system to be able to provide any useful solutions.