I'm mining with three gpus and NB miner showing my gtx1660 super having 5000+ memory but my RX580 8000+ memory, the gtx1660 super is where I'm confused, they have 6gb memory so why is miner showing only 5gb ? Should I be worried?

Someone is offering to sell me 10x gtx1080ti here at 200$ per card, is this a good buy? Those cards are used and I'm suspecting it's been used for mining too, I mean who would buy 10x gtx1080ti for gaming or video editing ?

Hi peeps, is it a good choice to build a mining rig with RX570 8gb in 2021? The reason why I bring this up is because I want to build a mining rig and my thought was with GTX1660 super but I luckily see RX570 8gb at cheaper price, like 150$ off from the gtx1660 super price @460$ each


The reason why I hesitate is because RX570 architecture is old, can't tell if miners update will keep supporting the card for another 8 years

Many new projects using the name decentralized aren't capable to be fully decentralized because what they offer are more like centralized ideas, it's shocking that many DeFi projects got hacked in 2020, this will forever be remembered in crypto history, why are DeFi projects easily getting breached by hackers ? Are centralized projects and platform a more reliable option right now? Why DeFi?

Newbies like myself be warned, don't make crypto decisions because of the following, they are very misleading and extremely danger to your money

1. Crypto Analysts predictions
2. Hyped projects by billionaires or known people e.g McAfee
3. Going into futures and margin trading when you haven't even mastered normal trading

Seek for answers and you shall find, knowledge is power