ATI Technologies on Tuesday introduced two new additions to its Radeon line of PC graphics cards. The entry-level Radeon 7000 comes with 32MB of double-data rate (DDR) memory and sells for $79. The Radeon 7200 has 64MB of single-data rate (SDR) memory and a DVD decoder. It sells for $99. Both will work with Microsoft's new Windows XP operating system, as well as with older versions of Windows.