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In English
SuomeksiCompared
In size comparison with reference design HIS HD 5850 and Gainward GTX 470. If all the cards had the stock PCBs, the HD5870 would actually be the longest, but with the Gainward GTX470 being longer than usual and the HIS HD5870 shorter than reference, the GTX470 is the longest of the bunch.
Cooling
The cooler has a thick copper base and closely spaced aluminum fins. Maybe a bit surprisingly there are no heatpipes on this cooler. The fan is 80 mm and specified at 12 volts and 0.35 A.
Cypress core and overclocking
The HD5870 is based on the same Cypress core seen in the earlier HD5850-review. It's made in 40 nm technology, packs 2154 million transistors and is 334 mm^2 in size. There are 1600 shaders, a gigabyte of memory and 256 bit memory lane. The stock clock speeds for theHD5870 are 850 MHz on GPU and 1200 MHz on memories, but the HIS iCooler V Turbo edition comes clocked at 900 MHz on the GPU and 1225 MHz (4,9 GHz GDDR5) on the memory.
With the card being already slightly overclocked out of the box, the hopes for OC margin aren't too high. After a quick go with the OCC we pushed the GPU from 900 to 920 MHz and the memory from 1225 to 1300 MHz (5,2 GHz GDDR). There might be more room for overclock through higher voltages and other tweaks, but these are the kind of numbers you can pretty safely expect.
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