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Power calculator

Find the right power supply for any PC, from a 1990s Pentium to today's fastest parts. Pick your components and you'll see the wattage to buy, the UPS or inverter size, and what it adds to your electricity bill each month.

Your components

CPU

Pentium (1993) to today
Brand
Generation
1 CPU

Motherboard

AT to today
ATX (1995–today)
Mainstream (e.g. B760, B860, B650, B850)

GPU

GeForce 256 / Radeon 7000 to today
None / onboard
Series
1 card

RAM

SDR to DDR5
DDR5 (2021–today)
2 sticks

Storage

IDE hard drives to PCIe 5.0 NVMe
NVMe SSD, PCIe 4.0, 8 W
1

Cooling (CPU cooler / AIO)

Tower air cooler (1 fan)

Case fans

120 mm
3

Optical & other drives

Floppy, CD, DVD, Blu-ray

Expansion cards

Extras

3 USB devices
0 RGB strips

Power supply & monitors

For wall power, UPS and electricity bill
80 Plus Gold, 90%
LED 27-inch 1440p high refresh (165–240 Hz), 42 W
1