I purchased this knowing i7 will entail having to deal with fan noise. But, it's super fast and despite its age and used nature, pretty well maintained. The unit comes with a 512 2.5 inch SSD installed but if you open it up and remove it, you can add an extra m.2 SSD underneath and migrate your OS onto it for much faster speeds, Which I did. There's another empty PCI slot if you want to add your own wifi card (doesn't come with wifi) or smaller m.2 hard drive. The 16 GB Ram is only one stick, not dual channel which is, depending on how you look at it, a shame or perfect if you want to add another 16 GB and bump ram up to 32 GB dual channel on the very cheap (make sure you match the speeds of the stick already installed or you'll waste your money buying faster, more expensive ram). I also, removed the heatsink and reapplied thermal paste that helped a little with fan noise. (Wish the seller had done this since it's a risky undertaking and not everyone is mechanically inclined to do so, instead of only cleaning is from dust). One thing to note is that this generation of Intel i7s doesn't play nice when playing back ultra HD or 4k video from internal hard drives, it's an Intel issue and I've tried super hard to fix it to no avail. (No issues with streaming 4k though through browsers or apps like Netflix). Overall, a good fast little unit that can be a little noisy at time (install a third party fan control application to control the fan curve if it's gonna sit on your desk).