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Compare power supplies

Every power supplies we've reviewed, side by side. Prices are the latest UK price we have: today's where a retailer reports one, else the typical price when we researched it (marked ~). See the ranked Top 10

ProductRated output (W)Efficiency rating (80 Plus or Cybenetics)Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x supportModular cabling (fully, semi or non-modular)PriceUpdates untilScore
Corsair RMx Series RM1000x Fully Modular Power Supply1000W continuousMeasured Cybenetics Platinum: 89-91% at 115V, 91-93% at 230V (Hardware Busters)ATX, 160x150x86 mm (Corsair); 150x85x160 mm (Hardware Busters)Fully modular, Type-4 cables~£130not announced7.7/10verdict: buy
be quiet! Pure Power 12 M 850W850 W continuous, 900 W peak; 850 W combined 12V output, 600 W combined 12VHPWR80 PLUS Gold; up to 93.2% (manufacturer); Cybenetics [115V] Platinum rating, 89–91%ATX 3.0; PCIe 5.1 compatibleFully modular–not announced7.7/10verdict: buy
ASUS ROG STRIX 1000W Gold Aura Edition1000 W total output80 PLUS GoldATX12V (labelled Intel Form Factor), 180 x 150 x 86 mm, ATX 3.0 listedFully modular (retailer-stated; not confirmed by ASUS)~£189.99not announced7.6/10verdict: buy
Cooler Master MWE Gold 850 V3 ATX 3.1850 W80 PLUS GoldATX 3.1Fully modular~£69.99not announced7.5/10verdict: buy
Corsair SF750 SFX Fully Modular 80 PLUS Platinum750 W continuous; +12V rated 62.5 A / 750 W80 PLUS Platinum; Cybenetics Efficiency Platinum; Cybenetics Noise A-SFX, 100x125x63.5 mmFully modular, Type-5 Micro-Fit connectors~£137.97not announced7.4/10verdict: good, not the best
Seasonic FOCUS GX-750 ATX 3.1750 W80 PLUS Gold; Cybenetics Platinum listed on v5 pageATX/EPS, 140 mm depthFully modular~£119.99not announced7.3/10verdict: good, not the best
Corsair RM1000e (2025) RMe Series Fully Modular ATX 3.1 Power Supply1000 W rated continuous output; +12V rail 83.3 A; +3.3V and +5V 150 W each; +5VSB 15 W80 PLUS Gold and Cybenetics Gold per Corsair; Hardware Busters measured Cybenetics Platinum (89.483% at 115 V, 91.576% at 230 V)ATX, 140 x 150 x 86 mm; ATX 3.1 certified; PCIe 5.1 compliantFully modular~£119.99not announced7.2/10verdict: good, not the best
Corsair RMe Series RM750e750 W continuous; +12V rail rated 62.5 ACybenetics Gold; up to 89% overall efficiency (manufacturer claim)ATX; ATX 3.1 certified; PCIe 5.1 compatibleFully modular~£89.99not announced7.2/10verdict: good, not the best
Corsair RMe Series RM850e850WCybenetics GoldATXFully modular~£94.99not announced7.0/10verdict: good, not the best
Seasonic FOCUS GX-850 ATX 3 (2024)850 W80 PLUS GoldATXFully modular~£144.95not announced6.8/10verdict: good, not the best
NZXT C850 Gold ATX 3.1850 W80 PLUS Gold and Cybenetics Gold; measured at 115 V: 85.8% at 10% load, 89.5% at 20%, 91.7% at 50%, 89.2% at 100%ATX 3.1, 150 x 86 x 160 mmFully modular~£110.74not announced6.7/10verdict: good, not the best
be quiet! Pure Power 12 750W (BP003EU)750W continuous, 820W peak; single 12V rail, 62.5A on +12V1, max combined 12V 750W80 PLUS Gold, up to 92.8%ATX, ATX 3.1 compliant, PCIe 5.1 compatibleNot modular (fixed cables)~£89.99not announced6.6/10verdict: good, not the best
MSI MAG A750GL PCIE5750W rated output80 PLUS Gold, up to 90%; Cybenetics Gold icon on MSI product pageATX, 140 × 150 × 86 mmFully modular~£79.99not announced6.4/10verdict: good, not the best
MSI MAG A850GL PCIE5850W rated output80 PLUS Gold, up to 90%ATXYes, full modular~£89.99not announced6.3/10verdict: good, not the best
Lian Li SP750750 W maximum DC output; +12V 744 W; +3.3V/+5V 100 W combined80 PLUS GoldSFX, 100 x 63.5 x 125 mm (D x W x H)Fully modular~£109.99not announced5.9/10verdict: good, not the best
Corsair CX650 650W 80 PLUS Bronze ATX PSU650 W continuous80 PLUS BronzeATX (ATX12V v2.31; ATX 3.x not stated)No (non-modular)~£44.99not announced5.3/10verdict: good, not the best

Prices marked ~ are the typical UK price when we researched the product; we show today's price once a retailer reports one. Value uses today's price, so it changes as prices move.

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