Radeon 545v on Samsung r540 JS0B

Hello. I was presented with a Samsung r540 JS0B laptop, with a Radeon hd545v video card installed. I started installing the driver, and I ran into a problem: the AMD site does not have drivers for my video card. Only available for hd4500, but they are not installed. On the site samsung found the driver version 8.732.0.0 of 04/05/2010, but it's old, and because of this many games simply do not open. What should I do, where can I find the driver for a video card released by radeon? System windows 8.1 64bit.