Title says all. I tried DXdiag and many programs like everest speccy and drhardware.
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Do you have the monitor cable connected to the video card? If you do, then it obviously works. The HD 3450 is a low end / low power card. It does NOT require the 6-pin PCIe plug-in. Don’t be concerned about things that don’t apply.
As stated above by kuwese, if you don’t have SP3, the 1st thing you should do is download & install it:
http://www.microsoft.com/en-us/down…
After that’s completed & you’ve rebooted, then download & install the AMD/ATI video driver:
http://support.amd.com/us/gpudownlo…