In addition to the long and complicated name, the HIS HD 4870 IceQ4+ Turbo features twice the memory compared to the AMD HD 4870 reference design. The clock speeds have also received a boost, now running at 770 MHz core and 1000 MHz memory out of the box. Last but not least, HIS replaced the AMD cooler with their own IceQ cooling system.



Link: Techpowerup