As far as their FAQ says it is "video card Radeon R9 280 X Gigabyte (GV-R928XOC-3GD) that has productivity around 700 Kh/s"

Don't know whether that is really true though. I use their services, they are paying very punctually.

Right now I have purchased 280 KH/s from them and is receiving about 2.5 USD every 3 days.

They are the best I have found so far for cloud mining. https://hashocean.com/signup/?rid=327451