| Two Radeon 3870 X2s working in pair. Note the longer Crossfire connector |
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AMD'S ATI Radeon
HD 3870 X2 marks first real dual-GPU supported and manufactured by AMD. As
you can see in a pictures, the boards are connected via single bridge. The
reason for first single-bridge appearance in ATI cards (HD2600 X2X has two
bridges, just like regular parts) is the fact that one bridge is wired through
the PCB and links the two GPUs locally, so "black magic" was not used in order
to connect two the GPUs. Just logic and available resources. Beneath the
cooler there are two chips. Each has its own 512MB of memory. But even with this
board producing a decent amount of heat, this cooler does not use any visible
heatpipes. It is just a longer version of the concept we saw with the 2900XT
from the outside, but from the inside, there is nothing but copper fins. This
board will consume give or take equal power as a single 2900XT, and ATI opted to
use one six-pin and one eight-pin PEG connector. With the 8-pin connector being
specc'ed as a PCIe Gen2 requirement, it'so wonder that both AMD and Nvidia will
use this connector in the future.
When the board debuts (current target is February) with higher clocked
Phenoms (B3 rev), getting two of these cards will set you back anywhere between
800 and 1000 US Dollars or Euro, meaning buyers of four Radeon HD 3850s today
will not lose their value when these two pop along.
In other news, check out this "how-to" video of Sami Maekinen using the AMD OverDrive utility. He walks through the steps of overclocking the upcoming Spider Platform, based on AMD Phenom quad-core processors, ATI Radeon HD3800 Series and the AMD 7-Series chipset: