What PSU do I need?
Power supply for the RTX 3090
Get at least a 900 W power supply for the RTX 3090 (the maker recommends 750 W): our checker recommends 750 W with a Ryzen 7 9800X3D, 900 W with a Core i7-14700K. The cheapest one in our catalog that fits is the be quiet! Pure Power 13 M 1000W Gold (ATX 3.1).
Key facts· updated
- The RTX 3090 draws about 350 W while gaming (maker spec pages, checked Oct 29, 2026).
- The maker recommends a 750 W power supply for the RTX 3090 (maker spec pages, checked Oct 29, 2026).
- A PC with the RTX 3090 and a Ryzen 7 9800X3D draws about 550 W while gaming, so PC Atlas recommends a 750 W power supply (the higher of the maker's advice and 1.3× the draw, rounded up to 50 W).
- A PC with the RTX 3090 and a Core i7-14700K draws about 683 W while gaming, so PC Atlas recommends a 900 W power supply (the higher of the maker's advice and 1.3× the draw, rounded up to 50 W).
- Power plug on the RTX 3090: Standard 8-pin PCIe power. Every modern power supply has these.
| Card's gaming power | ~350 W |
|---|---|
| Maker's PSU advice | 750 W |
| With a Ryzen 7 9800X3D | ~550 W total while gaming → 750 W PSU |
| With a Core i7-14700K | ~683 W total while gaming → 900 W PSU |
| Power plug | Standard 8-pin PCIe power. Every modern power supply has these. |
Card power, plug and the maker's advice from maker spec pages (checked 2026-10-29). Total = processor + card + ~80 W for the rest; recommended = the maker's number or 1.3× the total, whichever is higher, rounded up to 50 W (the same rule Build a PC checks).
Power supplies that fit (900 W+)
| Power supply | Watts | Size | ATX 3.1 | Price today |
|---|---|---|---|---|
| be quiet! Pure Power 13 M 1000W Gold (ATX 3.1) | 1000 W | ATX | Yes | $150Sample |
| Corsair RM1000e 1000W Gold (ATX 3.1) | 1000 W | ATX | Yes | $159Sample |
| be quiet! Pure Power 13 M 1200W Gold (ATX 3.1) | 1200 W | ATX | Yes | $163Sample |
| Corsair RM1000x 1000W Gold (ATX 3.1) | 1000 W | ATX | Yes | $170Sample |
| Corsair SF1000 1000W Platinum (SFX) | 1000 W | SFX | Yes | $229Sample |
Cheapest first; SFX units are for small cases. Prices last checked ; Sample = PC Atlas catalog estimate, not a live store price.
Questions
What wattage power supply do I need for the RTX 3090?
Get at least a 900 W power supply for the RTX 3090 (the maker recommends 750 W): our checker recommends 750 W with a Ryzen 7 9800X3D, 900 W with a Core i7-14700K. The cheapest one in our catalog that fits is the be quiet! Pure Power 13 M 1000W Gold (ATX 3.1).
What power plug does the RTX 3090 use?
Standard 8-pin PCIe power. Every modern power supply has these.
Do I need an ATX 3.1 power supply?
No. The RTX 3090 uses 8-pin plugs, which every modern power supply has. ATX 3.1 is still a sensible pick if you might upgrade to a card with the 12V-2x6 plug later.
Is 750 W enough for the RTX 3090?
With a Ryzen 7 9800X3D-class processor, yes: the whole PC draws about 550 W while gaming, and 750 W leaves headroom for power spikes. With a Core i7-14700K (about 683 W total), step up to 900 W.