Yesterday we talked about the introduction of the new 4600 series GPU cards from Sapphire, and today it is Powercolor's turn to get in on the action. The lineup of cards from the company is much the same as those we talked about yesterday, with two flavours of the HD 4670 and three versions of the HD 4650. There are some obvious differences however, the main one being the cooling setups employed. Powercolor has opted to use a Zerotherm dual slot solution on its two HD 4670 cards (pictured), which come in same 512MB GDDR3 and 1GB DDR3 varities as the Sapphire cards (with memory running at 1GHz and 873MHz repsectively). Core speeds on both 4670 cards is 750MHz. The HD 4650 cards also appear to diverge from stock cooling, with a modest cooler used on the 1GB and 512MB versions (clock speeds of 600Mhz and memory speeds of 500Mhz on both of those). In addition to that there is the SCS3 HD 4650, which carries a large passive cooler for silent operation. Pricing and availability aren't mentioned, but I wouldn't be surprised if those were reasonably in line with the Sapphire parts also.