Best power supplies under £100 (2026)
The power supplies we've reviewed that cost £100 or less, best first. Each is scored against products at a similar price, so a high score here means good for the money. Where we don't have today's price, we use the typical UK price we found when researching it.
Researched, not hands-on tested.How we review ›
- #1
Cooler Master MWE Gold 850 V3 ATX 3.1
7.5/10verdict: buyThe MWE Gold 850 V3 ATX 3.1 suits builders who want a fully modular 850W power supply with a native 12V-2x6 cable for a gaming or workstation PC. It also fits anyone who values a long warranty and a platform maker with independent measurements behind it. It is less suited to buyers who want a silent PSU under heavy load or very flexible cables.
850 W80 PLUS GoldATX 3.1Fully modularRead the full review ݣ69.99typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)
Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details
- #2
Corsair RMe Series RM750e
7.2/10verdict: good, not the bestThe RM750e is for people building a single-GPU desktop who want a fully modular ATX 3.1 power supply with a native 12V-2x6 cable. It suits builders who value a quiet fan that stays off at idle and a 7-year warranty. It is a weaker fit for machines that idle around the clock, where owners report poor low-load efficiency.
750 W continuousCybenetics GoldATXFully modularRead the full review ݣ89.99typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)
Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details
- #3
Corsair RMe Series RM850e
7.0/10verdict: good, not the bestThe Corsair RM850e is an 850W ATX power supply for people building or upgrading a quiet desktop or workstation. It suits buyers who want a fully modular unit with a native 12V-2x6 cable and a seven-year warranty. It is less suited to builds that need many PCIe 8-pin cables or a low-load, always-on setup.
850WCybenetics GoldATXFully modularRead the full review ݣ94.99typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)
Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details
- #4
be quiet! Pure Power 12 750W (BP003EU)
6.6/10verdict: good, not the bestThis is a 750W ATX 3.1 power supply for a single-GPU desktop where low noise and a long warranty matter more than cable tidiness. It suits builders who want a native 12V-2x6 connector and Gold efficiency and are happy with fixed cabling. It is a poor fit for multi-GPU builds or cases that need a minimal cable count.
750W continuous, 820W peak80 PLUS GoldATX, ATX 3.1 compliant, PCIe 5.1…Not modularRead the full review ›£89.99typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details
- #5
MSI MAG A750GL PCIE5
6.4/10verdict: good, not the bestThe MSI MAG A750GL PCIE5 is for anyone building or upgrading a mid-range gaming or general-purpose PC who wants a fully modular 750W supply with a native 16-pin graphics cable. It suits systems with one mainstream graphics card and a few drives. It is a weaker fit for silent builds or for the most power-hungry graphics cards.
750W rated output80 PLUS GoldATX, 140 × 150 × 86 mmFully modularRead the full review ›£79.99typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)
Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details
- #6
MSI MAG A850GL PCIE5
6.3/10verdict: good, not the bestThe MSI MAG A850GL PCIE5 suits builders putting together a modern gaming PC who want a fully modular 850W Gold supply with a native 16-pin cable. It fits those who value cable management, quiet running under load and PCIe 5 support. It is less suited to always-on machines that idle at very low loads.
850W rated output80 PLUS GoldATXYesRead the full review ݣ89.99typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)
Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details
- #7
Corsair CX650 650W 80 PLUS Bronze ATX PSU
5.3/10verdict: good, not the bestThe Corsair CX650 is a 650W ATX power supply with fixed cabling and 80 PLUS Bronze efficiency. It suits a single-GPU desktop or a small server with a few drives. It is less suited to builds that need modular cabling, a native 12V-2x6 cable or high efficiency.
650 W continuous80 PLUS BronzeATXNoRead the full review ݣ44.99typical UK price when researchedSearch Amazon UK (opens in a new tab, affiliate link)
Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details