Cyber Monday is here and the deals are well underway. Retailers are offering killer discounts on everything from home-office PCs to decked-out gaming rigs and sleek all-in-ones. Still, not all computer deals are built the same.

If you need to grab some new sticks of RAM for an upgrade or new PC, there are some great Cyber Monday deals that you can take advantage of right now.

For more than a decade, I've tested PCs and edited hundreds of reviews, so I know what's a good deal and what you should skip. These big deals from Acemagic, Acer, Apple, and Dell are worth a look.