Video card installation

I am trying to install a new graphics card, an MSI 5770 Hawk into my Asus Essentio Cm 5675, i5Core, 8G 1T Hd, Windows 7 Home Premium. I was under the assumption it was plug & play. I installed it, added the Vga adapter and am getting no signal to my monitor. Ther is a power supply component that came with the unit, but as per some of the install videos I watched, it is for older models, and there are no slots for it. Am I missing a step? Any help greatly appreciated.
Jim Durkin

 

Hardware installation
Installation of the product really is easy. Once the card is installed and seated into the PC we now connect the 6-pin power connector to the graphics card. And yes... do make sure your power supply is compatible, preferably with a 6-pin power PEG header directly from the power supply
You can now turn on your PC, boot into Windows, install the latest ATI Catalyst driver and after a reboot all should be working. No further configuration is required or needed.

You need to connect the card to your powersupply as the pcie slot is not giving it enough power.

iain.t :major

 

One other tip on top of iain t's good advice:

Be sure the video card is properly seated (snapped in) the slot. I've seen a few cases where, if the card hasn't "clicked" in properly, the board won't recognize it.