AMD Radeon HD 4870 X2 "Spartan"
In addition to the already know details, like 2 GiByte GDDR5 VRAM and 2x 800 stream processors, there are interesting things to be read. The memory transfer rate is given with 230 GiB/sec. - exactly twice the size of the HD 4870. Therefore the clock speed of the memory has to be as high as with the HD 4870: 900/1,800 MHz. Furthermore the HD 4870 X2 is said to have an energy efficiency of 8.8 FLOPS per Watt - the also given performance of 2.4 TFLOPS would therefore indicate a power consumption of 272 Watt.
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