Mehrab

How is the Redragon K552-RGB ?

Never used a mechanical keyboard before so don't know much about it. It will be used for gaming and the regular typing. I would prefer the Tenkeyless ones or even 60% ones. Would like to buy within black friday so suggest some asap.?

I have a 8gb ddr4 2133mghz ram. I want to get another 8gb ddr4 and make it 16gb ( dual channel ). If I can find a ram with same cas latency and voltage would it be a problem mixing the rams ? Or is it a must to buy a new set of (8gb x 2) sticks? I am a newbie in this section so any suggestions would be welcome. And budget is a issue here. I will have to sacrifice SSD if I get the new sticks of ram. So is it worth it ?