Sapphire's new HD 4730 is based on the RV770 GPU which is used on the HD 48xx Series. Such a choice had to be made because the availability of the HD4770 GPU is extremely limited at this time - while customer demand is up. Sapphire offers their card with 640 shaders and 512 MB GDDR5 memory at an extremely competitive price point of only $79. But is that enough to take over that market segment?