We've heard of the HD 3650 - and in fact already seen a review of its big brother, the HD 3670 - but this is the first time we've heard the word HD 3690 muttered this side of the web. According to Expreview - who have analyzed a handful of pictures from ITOCP - the board uses the same RV670 core found in the HD 3850, with the full 320 stream processors, though only has a 128-bit memory interface. The site note that the board will retail at around US $110.