Sub-$100 Amazon Prime Day deals on things PC gamers need

This WD Black SN770 SSD is a great way to add 1TB of fast storage to your PC right now, and it can take advantage of motherboard with PCI 4.0. You can get a faster SSD for more money (like Western Digital's SN850 model), but the 5,150 MB/s read and 4,900 MB/s write speeds are plenty good for a dedicated game install drive. (A funny thing to say if 150MB/s hard drives still feel recent to you, too.)

This Corsair Vengeance RAM kit includes two 8GB sticks for a total of 16GB, which is the minimum you want for PC gaming these days. If you're still rocking 8GB of RAM, it's time to upgrade. And if you're putting together a new PC, it's not a massive discount, but little deals can add up across a whole build.

The Razer Deathadder V2 Mini is on sale for $15 right now, while the full-sized Deathadder V2 is $30. I've used a Razer Deathadder mouse for years, only replacing it once. The V2 is better than the older model, because it replaces the old side grip stickers—which eventually peel off—with textured plastic. It's a simple, light, accurate mouse at a reasonable price. I have no complaints. The regular version isn't especially big as far as mice go, but the Mini might be good for people with small hands. 

The SteelSeries Level Up Gaming Bundle includes an Apex 3 RGB keyboard, Rival 3 gaming mouse, and a mousepad. You're getting budget stuff, but the "whisper-quiet" keyboard goes for $50 on its own, and the mouse is $30. If you've just about maxed-out your PC build budget, this is a decent way to inexpensively acquire three necessities. 

The Blue Yeti is to USB microphones what Casper is to direct-to-consumer mattresses, the brand name that comes to mind first, but not necessarily because it's the best. The Yeti earned its name recognition, though: there's one on our list of the best microphones.

Not the most significant or exciting deal, but a headlamp is genuinely useful in lots of situations, such as when you're trying to fish a screw out of a PC case. 

If you've already got RGB lighting in your PC, an RGB mouse, and an RGB keyboard, you might as well go all the way and light your whole room with matching colors. This set of LED smart bulbs can be controlled with Alexa or an app.