HIS 7770 iCooler 1GB GDDR5 Graphics Cards H777FN1G Radeon HD 7770 PCIe SeriesCooler: iCoolerGPU: 7770 Core Clock: 1000 MHz Memory Clock: 4500 MHz Memory Size: 1024 MB Memory Type: GDDR5 Memory Interface: 128 bit Interface: PCI Express x16 (PCI Express 3.0) The card is equipped with the widely acclaimed HIS iCooler - certified by HIS that generates less than 28 dB in 2D mode Chipset: Radeon HD 7770 PCIe Series ASIC: RadeonTM HD 7770 GPU Manu. Process: (Micron) 28nm Memory Size: (MB) 1024 Memory Type: GDDR5 Engine CLK: (MHz) 1000MHz Memory CLK: (Gbps) 4.5Gbp Memory Interface: (bit) 128bit Power Supply Requirement: 500 Watt or greater power Max. Resolution: 2560x1600 per display Dual-link DVI)2048x1536 per display (VGA)Bus Interface: PCI Express 3.0 x16 Mini DisplayPort: NoHDMI: YesDVI: Dual-link DVI-DVGA: Yes