HIS - Hightech Information System Limited , is a HK graphics card company that produces ATI Radeon video cards, established in 1987. Since the first quarter in 2007, HIS has won over 600 awards with ATI graphic solution from major media worldwide. The headquarters is in Hong Kong, and with sales offices and distribution networks in Europe, Middle East, North America and Asia Pacific Regions. It is being recognized by providing performance leading and award-wining products: IceQ, iCooler, iFan, TURBO Edition, VIVO Edition, AIW Edition, Dual DVI Edition. The current distributor in Hong Kong is B.I.F. TECHNOLOGY CO., LTD.
|Model||Year||Code name||Fab (nm)||Bus interface||Transistor count (Millions)||Memory max (MiB)||Reference clock rate||Memory||Graphics library support (version)||Maximum Resolution||IceQ4 Cooling System||Notes|
|Core (MHz)||Memory (MHz)||Type||Bus Width (Bit)||DirectX||Shader Model||OpenGL|
|HIS HD4850 (512MB)||June 2008||RV770 PRO||55||PCIe 2.0 x16||956||512||625||993 / 1986||GDDR3||256||10.1||4.1||2.0||Two x 2560*1600 (Dual dual-link)||No||UVD 2, PowerPlay|
|HIS HD4850 IceQ 4 (512MB / 1024MB)||August 2008||RV770 PRO||55||PCIe 2.0 x16||956||512 / 1024||625||993 / 1986||GDDR3||256||10.1||4.1||2.0||Two x 2560*1600 (Dual dual-link)||Yes||UVD 2, PowerPlay|
|HIS HD4850 IceQ 4 Turbo (512MB)||August 2008||RV770 PRO||55||PCIe 2.0 x16||956||512||650||1000 / 2000||GDDR3||256||10.1||4.1||2.0||Two x 2560*1600 (Dual dual-link)||Yes||UVD 2, PowerPlay|
|HIS HD4850 IceQ 4 TurboX (512MB)||TBA||RV770 PRO||55||PCIe 2.0 x16||956||512||685||1100 / 2200||GDDR3||256||10.1||4.1||2.0||Two x 2560*1600 (Dual dual-link)||Yes||UVD 2, PowerPlay|
|HIS HD4870 (512MB/1024MB)||June 2008||RV770 XT||55||PCIe 2.0 x16||956||512 / 1024||750||900 / 3600||GDDR5||256||10.1||4.1||2.0||Two x 2560*1600 (Dual dual-link)||No||UVD 2, PowerPlay|
|HIS HD 4870 Turbo (512MB)||TBA||RV770 XT||55||PCIe 2.0 x16||956||512||780||1000 / 4000||GDDR5||256||10.1||4.1||2.0||Two x 2560*1600 (Dual dual-link)||No||UVD 2, PowerPlay|
|HIS HD 4870 X2 (2GB)||TBA||RV770 XT||55||PCIe 2.0 x16||956||2048||750||900 / 3600||GDDR5||2x256||10.1||4.1||2.0||Two x 2560*1600 (Dual dual-link)||No||UVD 2, PowerPlay|
The HD4850 IceQ4 TurboX is claiming to be the fastest Radeon HD4850 card in the World
HIS IceQ 4 is the 4th generation of IceQ cooling technology, which is endorsed by the media worldwide. The newly designed double-slot fans and heatsink, IceQ 4 can effectively dissipate the heat from the GPU, thus enabling it for high levels of performance. The newly designed heat-pipes layout shows its strength in effectively transfer heat from the core are and reducing the GPU temperature. Larger heatsink surface areas are implemented to maximize heat dissipation. HIS IceQ 4 cool down the GPU temperature dramatically when compare with the reference cooler, allow you to maximize your overclocking potential. Cooling capacity is increased by up to 20% in gaming mode.
How it works: air sucks into the card, cooling down the GPU and Memory, and dissipate hot air through the gaps above the HDMI port. With this design, it can ensure all hot air is blown out of the case without cumulating in it. The Dual-slot cooling design ensure you can conveniently connect the CrossFire cable to run a CrossFire setup. Due to the good design, a reasonable temperature can be achieved by a low default fan speed, so quieter.