Power supplies

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ATX and SFX power supplies, from efficient mid-range units to high-wattage models for top-end GPUs. Filter by wattage, efficiency, form factor, modular cabling and 12V-2x6 connector, and pay in BTC, ETH or USDT.

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Buying power supplies at HodlChip

The power supply feeds every other part, so choose it with care:

  • Wattage: follow the recommended PSU size for your graphics card. NVIDIA, for example, lists 1,000 W for an RTX 5090 system and 850 W for an RTX 5080. Headroom keeps the fan quieter and leaves room for upgrades.
  • ATX 3.1 and 12V-2x6: the current standards are built for the short power spikes of modern GPUs and include a native cable for cards with a 12V-2x6 connector.
  • Efficiency: 80 PLUS Gold is the usual balance of price and efficiency; Platinum and Titanium waste less power as heat, which matters for systems that run all day.
  • Cabling and size: fully modular units make tidy builds easier. Small form factor cases need SFX or SFX-L, so check the PSU form factor your case supports.

Never reuse modular cables from another power supply: pinouts differ between brands and even between series, and the wrong cable can destroy components. The PSU sizing guide walks through the math, and cables and adapters cover the rest.

Going deeper: PSU sizing guide 2026: how many watts does your PC need?

Questions about power supplies

How many watts do I need?
Follow the graphics card maker's recommendation, or add up CPU and GPU power and add headroom. As a guide, NVIDIA lists 650–750 W for RTX 5070-class systems, 850 W for an RTX 5080 and 1,000 W for an RTX 5090. See the PSU sizing guide.
What does ATX 3.1 mean?
ATX 3.1 is the current revision of Intel's desktop power supply specification. It requires units to handle short power spikes from modern graphics cards and uses the 12V-2x6 connector, the revised version of 12VHPWR. ATX 3.0 units also handle these spikes.
Do I need an SFX power supply?
Only for small form factor cases that cannot take a standard ATX unit. SFX and SFX-L units are smaller but available in high wattages. Check the PSU form factor your case supports; some SFX units include a bracket to fit an ATX case.