3D Game Man posted a review on the HIS HD 3870 512MB GDDR4 Video Card

The new line of Radeon HD 3800 series video cards are currently available in two models; the 3870 and 3850. These are next-gen products but the 3870 has faster memory and core speeds and comes with 512MB of GDDR4 memory as opposed to 256MB of GDDR3 memory on the 3850 model. The core speed on this product is 775MHz and the 512MBs of GDDR4 256 bit memory is 2.25GHz DDR. It comes with 320 stream processing units for vertex, pixel and geometry data, 16 texture units, 16 raster operators, the pixel fill rate is approx. 12400 MPixels/sec and the memory bandwidth is 72GB/s. Watch the video to find out more and check out the bloopers at the end.

HIS HD 3870 512MB GDDR4 Video Card Review