I am also ne to bitcoin and really confuse what does R9 280x toxics up to 800 Kh/s (running 3 in a rig I built atm) for a total of 2400Kh/s means or about XFX R9 280. I would really appreciate if you tell me about it in plain English instead of technical words. Or you may even give me the link of some reliable site so I may attain basic knowledge regarding its functionality