Sapphire Radeon HD 4830 512MB

HD 4830 - 512MB - DDR3 The new SAPPHIRE HD 4830 shares the award winning graphics architecture used in the existing HD 4800 series and offers the same features, but with an optimised specification and lower price point to deliver the best performance in its price category. With 640 shader engines and clock speeds of 575 MHz (core) and 900MHz (memory), it offers similar overall performance to the HD 4850 model but at a reduced price point.