It's a LG. (<a href="http://us.lgservice.com/jsp/common/download.jsp?DOC_ID=KROWM000032123&FILE_NAME=KROWM000032123.pdf&ORIGINAL_NAME_b1_a1=GCE-8520B-1040G-ENG.pdf&FILE_GUBUN=I">Drive manual</a>).

From what I could see on their site and from my knowledge of cd-burners:

- Check to see if your drive has dma enabled (right click on "my computer"> devices > device manager then find your drive and click properties and check if dma is enabled.
- Check to see that the media you're trying to use can withstand that speed.
- Check that your software has support for that speed.