Short answer: for most gaming PCs, the Corsair RMx (2024) at 750W or 850W is the safe choice. For an RTX 5090, take the 1000W version. Every unit on my list is in stock on Amazon and ATX 3.0 or newer.
Why only units on Amazon?
Big reference lists include hundreds of units, and many are hard to find or long discontinued. My list only includes power supplies you can order today, so every recommendation is one you can actually buy. I check it every month and remove units that drop off Amazon.
My pick at each wattage
- 650W · Tier ASeasonic Core GX ATX 380 Plus Gold · Fully modular · ATX · 650/750/850WCompact and well built. For an RTX 5070 or smaller.Check 650W price
- 750W · Tier ACorsair RMx (2024)80 Plus Gold · Fully modular · ATX · 750/850/1000WQuiet, with fan failure protection. For an RTX 5070 Ti or RX 9070 XT.Check 750W price
- 850W · Tier ACorsair RMx Shift80 Plus Gold · Fully modular · ATX · 750/850/1000WTidy side sockets. For an RTX 5080.Check 850W price
- Check 1000W price
- 1200W · Tier ACorsair HXi (2025)80 Plus Platinum · Fully modular · ATX · 1200/1500WVery quiet. For an RTX 5090 with a top processor.Check 1200W price
Browse by wattage
| Page | Units | Tier A / B / C |
|---|---|---|
| Best 650W PSU | 17 | 5 / 8 / 4 |
| Best 750W PSU | 53 | 24 / 23 / 6 |
| Best 850W PSU | 69 | 38 / 24 / 7 |
| Best 1000W PSU | 57 | 42 / 14 / 1 |
| Best 1200W PSU | 38 | 33 / 5 / 0 |
| Best 1300W+ PSU | 21 | 21 / 0 / 0 |
Buying a power supply on Amazon: what to check
- The exact model and year. Brands reuse names. Check the listing says ATX 3.0 or 3.1. See how to tell if a deal is good.
- The wattage. Listings group sizes together. Make sure you’ve picked the one you need.
- Who sells it. Sold by Amazon, or by the brand’s own store, is simplest for returns and warranty.
Not sure what size you need? Start with the wattage guide.
Questions
What is the best power supply on Amazon?
For most gaming PCs, the Corsair RMx (2024) at 750W or 850W. It’s quiet and well reviewed, with fan failure protection.
Are power supplies on Amazon genuine?
Buy from listings sold by Amazon or the brand’s own store, and check the exact model and year.
Can I return a power supply to Amazon?
Amazon’s usual returns policy applies. Check the listing and the seller before you buy.
Why do some units on your list link to an Amazon search?
Where I don’t have a direct product link for a size, the button opens an Amazon search for that exact model.
Sources
- Corsair: RMx series update (September 2024)
- HWBusters: Corsair RM850x Shift ATX 3.1 review
- Tom's Hardware: Corsair HX1200i ATX 3.1 review
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