We're refreshing our picks
Prices for power supplies in this category have moved above £50 since our last review. We track the market daily and will restore the under-£50 recommendations the moment products come back into bracket.
We're rebuilding our recommendations across this category. Browse all buyer's guides while we restock.
Frequently Asked Questions
Here's the thing: genuinely quality modular power supplies under £50 are extremely rare in 2026. The products in this roundup range from £120 to £380, representing the current market reality for reliable modular units. Budget semi-modular options occasionally dip below £50, but fully modular designs with proper efficiency ratings and safety certifications typically start around £100.
Most modern gaming builds need 650-850W for mid-range GPUs, while high-end systems with RTX 4080/4090 cards benefit from 1000W+ units. The MSI MPG A1000G at 1000W handles even power-hungry configurations with headroom for overclocking. Always check your GPU's recommended PSU wattage and add 20% overhead.
Absolutely. Gold-rated PSUs like the Corsair RM1000x SHIFT waste less energy as heat, run cooler, and often feature better components. Over a PSU's 5-7 year lifespan, the electricity savings can offset the higher purchase price. Plus, they're generally quieter under load.
If you're buying in 2026, yes. ATX 3.0 handles power transient spikes from modern GPUs better, and native PCIe 5.0 12VHPWR connectors eliminate the need for dodgy adapters. The Corsair RM1000x SHIFT and Thermaltake Toughpower PF3 both support these standards, future-proofing your build.
Fully modular units let you detach every cable, including the 24-pin motherboard and 8-pin CPU connectors. Semi-modular keeps those permanently attached. For cable management and aesthetics, fully modular wins, but semi-modular options are often cheaper and perfectly functional for most builds.
