A billion here, a billion there - pretty soon it adds up to real money. ',Senator Everett Dicksen (1896-1969)" - 1 "279"
RD790 (790 CrossFire or 790X) is a high-end chipset, the features of which were already mentioned on these pages. It brings PCIe 2.0 support, and Quad Crossfire is also possible due to four supported PEG (PCI Express Graphics) connectors. With PCIe 2.0 bringing 150 Watts through the motherboard, even juice-hungry R600 will be able to work with a single 6-pin power cable.
The second chipset is RX780 (780X), nothing else but a mainstream version of the above mentioned RD790, but without CrossFire support.
Then, there are two models with integrated graphics, one of which is supporting DirectX 9, and another bringing HD2000 series into the integrated market - DirectX 10 compliant part.
RS740 or 740G will support DX9 and is nothing more than a pumped up 690G, while RS780 (780G) is a base for AMD's Bulldozer platform (in mobile terms, RS780 chipset is called Puma), supporting UVD and DX10.
These four chipsets will be paired with either SB600 or SB700 Southbridge chip, depending on release timeframe. RS740 and RX780 are arriving in third quarter of this year, while RD790 and RS780 will come in time for Yule. µ
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