Thanks I understand that part, but I see a lot of people just asking or stating hashrates for a given GPU without mentioning for what algorithm, so I was thinking that if they are not mentioning it's because it may be based on a standard hashrare for bitcoin or etherum or one of the most popular cryptocurrency and their algorithms.
In other word, if someone tell me their GPU has a hashrate of 25 Mh/s, that is mining what?
I'be been doing research o the best GPU for the money and ROI. I'm using nicehash and they have a good amount of GPU info to compare on their calculator and I can see the different speeds of mining, but for the ones they don't I see people refer to GPU hashrate, is that "speed" on an specific algorithm?