The SAPPHIRE R7 240 4GB with Boost now has the latest DDR3 memory clocked at 1600MHz effective, and runs with a core clock speed of 730 MHz which with PowerTune Dynamic Boost rises to 780 MHz on the engine. 320 Stream Processors 28 nm Graphics Core Next (GCN) 730 MHz Engine Clock 780 MHz Boost Engine Clock 128 bit Memory Bus DDR3 Memory Type 1600 MHz,1800Mbps Effective Memory Clock 4096 MB Size 1 x Dsub 1 x DVI-D 1 x HDMI model : 11216-02-20G tag : Video - Graphic Cards