PCinLife has posted up a great picture of the upcoming AMD Radeon HD
7970 video card for all the world to see. What makes this picture so
great is that they took the GPU cooler off and show not only the vapor
chamber cooler, but also the 7970 PCB.
The picture reveals a card with a read PCB, which means that this is an
early sample. We know the retail versions have a black PCB, so this is
not the final design. This is confirmed by the fact that there are two
6-pin connectors, but we know that the final version of the card has
both 8-pin and 6-pin PCIe connectors. This picture does show the AMD
Radeon HD 7970 single-GPU reference board uses a digital-PWM power
design. There also appears to be CPL-made single-phase PWM chokes and
Volterra-made regulators. Not everything is digital though as there is
still some analog power seen on the PCB. Follow the link below to the
forums to see a higher resolution image of the one below.
The GPU package design is nothing like we've seen from AMD. It looks to be slightly larger than that of AMD Cayman. The die is oriented diagonally, with a sturdy brace around it reduce and stabilize the pressure applied by the cooling assembly. There are twelve memory chips around the GPU, as this chip features a 384-bit wide memory interface, to deliver nearly 50% higher memory bandwidth over the previous generation. The card features redundant BIOS, loaded into two separate EEPROM chips that can be toggled using a small 2-way switch located next to the Crossfire connectors. Display connectors include one DVI, one HDMI, and two mini-DP connectors. The second picture below reveals a curvy back-side of the cooling assembly. A nice aesthetic touch with zero function.
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