Bright Side of News heard Apple is buying up a lot of ATI Radeon HD 5750 graphics cards for an upcoming refresh of its iMac lineup:
It all started with the purchase of ATi Radeon HD 4850, which now as we all know - is an integral part of their iMac lineup and continuing with a recent switch to ATI Radeon HD 5750. Originally, the deal between AMD and Apple was supposed to result in a steady supply of Radeon HD 4850 chips until the end of June, but this all changed for good when Apple requested HD 5750. As a result, there is currently a HD5750 shortage which will trickle down to market in a few weeks or less. Luckily, there's no signs of 5770 shortage, so you should be able to continue buying Juniper-based parts. It's just that almost all 720 shader parts will go to Apple.
Just like any other OEM, Apple is known for changing their minds often and we weren't surprised to learn that giant from Cupertino adopted AMD's DX11 hardware in a form of HD 5750. Can you say - iMac refresh? Given that Apple continued its orders with Intel in "business as usual" fashion, we take that Apple iMac refresh could be set for June 2010 and traditional Apple Worldwide Developer Conference, traditionally taking place in San Francisco, CA.