techPowerUp posted a review on the HIS HD 4870 IceQ4+ Turbo 1 GB GDDR5

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.

HIS HD 4870 IceQ4+ Turbo 1 GB GDDR5 Review