ATI Technology has slashed the price and increased the core clock speed just before it releases the high-end Radeon 8500 graphics board. When ATI introduced the board in mid-August, it announced the price as $399 and the core clock speed as 250MHz. But this week, the company dropped the price to $299 and increased the speed to 275MHz. The graphics board, which will be released Oct. 25, is used to enhance visual effects and 3D images, particularly for video games. The graphics board is also optimized to take advantage of Windows XP, Microsoft's new operating system.