New installation of ATI HD3650 graphics card not recognised by Win 7

I have just installed a new ATI Radeon HD3650 PCIE 1Gb graphics card in my HP dc5750. At the same time I replaced the 165 Gb HDD with a new WD 465 Gb drive and did a clean install of Win 7 Professional. I have run all the updates, including SP1. The machines has a 2.2 Mhz dual core cpu and has 3 Mb of RAM on board.
The dc5750 previously had no graphics card installed, but integrated video.
All of the above went smoothly and the PC is functioning normally, except that the HD3650 does not appear under Device Manager and is not recognised. It is working, I can tell, as the fan is running (it is noticeably noisier than without the card, but quite acceptable) and what is listed is an AMD High Definition Audio Device within Device Manager.
Before buying the new card, I checked the original spec of this machine - bought new three years ago but not heavily used. The HD3650 was listed as the top of the range card fitted as OEM to this machine, so it should be fully compatible.
I have downloaded the latest ATI drivers, but this has had no effect.
Also, though I have speakers attached, I am getting audio out of one only, since the upgrade.
Any help would be much appreciated.

Install ALL motherboard and chipset drivers from HP site

Hi, Nikdorado,
Thank you for this. I am sorry but I don't fully understand. You mean update/reinstall all drivers for this specific PC type from the official HP site?
I am not quite a tyro but still learning.
Best

Yes, reinstall all drivers for you pc from HP site.

OK thanks. working my way through them.

Falcodriver said:

I have just installed a new ATI Radeon HD3650 PCIE 1Gb graphics card in my HP dc5750. At the same time I replaced the 165 Gb HDD with a new WD 465 Gb drive and did a clean install of Win 7 Professional. I have run all the updates, including SP1. The machines has a 2.2 Mhz dual core cpu and has 3 Mb of RAM on board.
The dc5750 previously had no graphics card installed, but integrated video.
All of the above went smoothly and the PC is functioning normally, except that the HD3650 does not appear under Device Manager and is not recognised. It is working, I can tell, as the fan is running (it is noticeably noisier than without the card, but quite acceptable) and what is listed is an AMD High Definition Audio Device within Device Manager.

Have you checked the BIOS on your HP DC5750, to ensure that it is not forcing internal integrated video?

Typically there is an "auto" setting to automatically detect the optional presence of a discrete graphics card and to use it if present. Or if you know you have a discrete graphics card installed you might set the BIOS to always use it (from the PCIe slot). Or whatever. But if you previously didn't have a discrete graphics card until now, perhaps that BIOS setting is set at "internal graphics only" thus preventing the new HD3650 card from being detected and utilized.

As far as the HDMI audio device showing up, that does suggest the card is visible to Windows.

Are you sure you used the correct "legacy" Catalyst drivers downloaded from the ATI site? They have two classes of supported hardware now: (a) HD5000 and newer, and (b) HD4000 and older. If you were using the "latest" Catalyst 13.12 drivers it would only support HD5000 and newer, and your HD3650 video card would not be supported, hence no video Display Driver would have been installed for it although the HDMI audio perhaps could have been. But if you used the proper "legacy" 13.1 version of Catalyst driver then your HD3650 should have been detected and proper Display Driver installed, along with the HDMI audio driver.

Those are my initial questions.

badger906 said:

if you are getting video from the graphic card then its working, if you get "NO signal" when connecting a dvi/hdmi cable to it then something is a miss.

If you still have the dvi/hdmi cable attached to the motherboards output then it will continue using the Integrated GPU.

He said the HD3650 does not show up in Device Manager.

If it was seen as a generic VGA adapter but no driver had yet been installed, it would appear that say. Or, it might show up in "other devices" with a yellow exclamation mark next to it. No matter whether a cable is connected from it or not, the card should appear in Device Manager if the BIOS recognizes its presence.

But if it is simply not anywhere in Device Manager then the BIOS is not recognizing it. That to me suggests a BIOS setting that is forcing internal graphics.