To get enough power to the card you will need two 8-pin power connectors to feed the card. The PCIe slot delivers 75W, the two 8-pin connectors another 300W. Of course these are theoretical figures. The two GPUs are powered by ten phase digital power controllers and another two phases are used for the memory.
Here, two photos of the GTX 690 with the fan shroud removed. You can see the two vapor chamber coolers in the upper photo and, below, the card all naked with the ICs exposed.
To the left and right are the two GPUs, in the middle we spot an PLX chip bridging the two GPUs. Surrounding the GPUs are the memory ICs and then we see all the smaller stuff, like capacitors, voltage regulators, resistors and so on.
Each GK104 uses 1536 CUDA cores alongside 128 Texture Units and 32 ROPs for a total of 3072 cores, 256 TMUs and 64 ROPs. Each GPU has 3.54 billion transistors embedded into it, so that's a good 7 Billion transistors at work for the GeForce GTX 690.
Oh and once powered up, on the top side of the card 'GeForce GTX' will light up as its LED is lit. A very nice looking card alright.
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