September will see ATI following up on the highly successful 4800 series cards with the introduction of the more mainstream oriented HD 4670 and HD 4650 GPUs. Sapphire, the largest supplier of ATI based cards will be releasing a number of cards based on these GPUs, which aim to provide superior performance for equal or less cost than competing NVIDIA offerings. The first of these cards, which should be popping up at retailers as very soon is the HD 4670 (pictured). Sporting the 55nm RV730 XT GPU running at 750MHz and 512MB of GDDR3 running at 1000MHz it will launch at $79, with Sapphire claiming decent performance increases (almost double in some cases) over the 9500 GT. A 1GB version of the card with slightly slower DDR3 memory will also be coming in late September. You can expect to see the HD 4650 cards at around that time as well, with a 512MB GDDR3 version for $75 and DDR2 versions starting at $69.