Are you building a gaming PC, or upgrading your existing one after finding a great Prime Day deal? I reckon you might have forgotten something. You'll need a specific screwdriver bit, or some fresh thermal paste, or perhaps even an upgraded PSU to power your fancy new components.I've got you covered. I've built many, many gaming PCs over the past 26 years, so I've spent the morning gathering up the best deals I can find on all the extras you might need. We're curating all the best Prime Day PC gaming deals hereStarting off with some tried and tested thermal paste for just $5 at Amazon, and finishing with a 1200 W PSU that should power virtually any gaming rig for $140 (yes, even one with an RTX 5090), these 15 deals should ensure you have all the correct gear at your disposal.I've also thrown in some CPU/system cooling options of all different sorts and sizes, as keeping your PC chilled out is vital for maximum performance. And I've, err, included this neat little external power button for $11. You don't need one, but isn't it fun?Anyway, building and upgrading gaming PCs is what we do. Give the list below a quick once-over, and make sure you've got everything you need to put your rig together properly. And most importantly, have fun! It's supposed to be relaxing, you know...Prime Day Deals on PC building tools and components Arctic MX-4 Thermal Paste | 4 g Acer GPU Support Bracket Cable Matters 200-Pack Self-Locking Nylon Zip Ties | Assorted Sizes SinLoon External Power Button for Desktop PC Thermalright Tl-C12C 120 mm Cooling Fans | 5-pack Thermal Grizzly Kryonaut High Performance Thermal Paste | 5.55 G SMALLRT Extension Cord Outlet Extender | 12 AC Outlets | 4x USB | 6.5 foot Silkland USB Type-C/USB 4/Thunderbolt 5 Cable | 5ft | 80 gbps | 240 W STREBITO 142-Piece Electronics Precision Screwdriver Set - 120 Bits HOTO 25-In-1 Mini Electric Screwdriver Corsair RS120 RGB 120 mm Pwm Fans – Triple Pack Thermalright Peerless Assassin 120 Vision Max CPU Air Cooler MSI MAG CoreLiquid A13 360 mm CPU Cooler Corsair RM750e (2025) Fully Modular Low-Noise ATX 3.1 Power Supply Be Quiet! Pure Power 13 M 1200 W ATX 3.1 Power Supply