Can't find product in driver support on web
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There is no such thing as a HD5700 graphics card. There is a HD5700 SERIES of cards...which do you have?
AMD Drivers and Support for Radeon, Radeon Pro, FirePro, APU, CPU, Ryzen, desktops, laptops
The device manager shows “HD 5700 Series”. What do I do next?
Download GPU-Z and use its 'Lookup' button.
I believe that card is in legacy status so if you are by chance running WIndows 10, the driver Windows installs automatically would be the only driver available.