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Corsair CX650 650W 80 PLUS Bronze ATX PSU vs Seasonic FOCUS GX-850 ATX 3 (2024)

Researched, not hands-on tested.How we review ›

all judged against power supplies at a similar price

The Seasonic FOCUS GX-850 ATX 3 (2024) scores 6.8/10 overall, ahead of the Corsair CX650 650W 80 PLUS Bronze ATX PSU at 5.3/10.

The Corsair CX650 650W 80 PLUS Bronze ATX PSU leads on quality and protections.

The Seasonic FOCUS GX-850 ATX 3 (2024) leads on efficiency, cabling and connectors and warranty.

They score the same on noise.

The biggest difference is warranty, where the Seasonic FOCUS GX-850 ATX 3 (2024) scores 10/10 to the Corsair CX650 650W 80 PLUS Bronze ATX PSU's 6/10.

Corsair CX650 650W 80 PLUS Bronze ATX PSU

Corsair CX650 650W 80 PLUS Bronze ATX PSU

5.3/10verdict: good, not the best

The 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.

Typically about £44.99 in the UK when we researched itSearch Amazon UK (opens in a new tab, affiliate link)

Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

Seasonic FOCUS GX-850 ATX 3 (2024)

6.8/10verdict: good, not the best

The Seasonic FOCUS GX-850 ATX 3 (2024) is for builders who want a fully modular 850 W unit with a native 12V-2x6 cable for a current graphics card. It suits buyers who value a 10-year warranty and strong efficiency figures on 230V mains. It is a weaker fit for anyone who puts tight voltage regulation or a consistently quiet fan first.

Typically about £144.95 in the UK when we researched itSearch Amazon UK (opens in a new tab, affiliate link)

Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

Scores, criterion by criterion

CriterionWeightCorsair CX650 650W 80 PLUS Bronze ATX PSUSeasonic FOCUS GX-850 ATX 3 (2024)
Quality and protections30%6/105/10
Efficiency20%5/108/10
Cabling and connectors20%4/107/10
Noise15%5/105/10
Warranty15%6/1010/10
Overall5.3/106.8/10

Specifications

SpecCorsair CX650 650W 80 PLUS Bronze ATX PSUSeasonic FOCUS GX-850 ATX 3 (2024)
Rated output (W)650 W continuous850 W
Efficiency rating (80 Plus or Cybenetics)80 PLUS Bronze80 PLUS Gold
Form factor (ATX or SFX) and ATX 3.x / PCIe 5.x supportATX (ATX12V v2.31; ATX 3.x not stated)ATX
Modular cabling (fully, semi or non-modular)No (non-modular)Fully modular
Graphics card connectors (12V-2x6 / 12VHPWR and PCIe 8-pin count)2 PCIe 8-pin (6+2) on one cable; 3 SATA on one cable; 2 PATA 4-pin; no 12V-2x6 or 12VHPWR1x 12V-2x6 (native); 1x PCIe 12+4 pin (600W) per Hardware Busters; 3x PCIe 6+2 pin; 8x SATA; 3x Molex
Fan size and zero-fan mode120mm sleeve bearing, thermally controlled; zero-RPM mode not stated135 mm fluid dynamic bearing fan; semi-passive mode (selectable)
Warranty (years)5 years10 years

Strengths and weaknesses

Corsair CX650 650W 80 PLUS Bronze ATX PSU

  • + 5-year warranty
  • + 12V ripple of 48.6 mV at full load, within the limit
  • + Compact 125mm body
  • − Non-modular cabling
  • − No 12V-2x6 or 12VHPWR connector
  • − 80 PLUS Bronze efficiency only

Skip it if:

  • Buyers whose graphics card needs a native 12V-2x6 or 12VHPWR cable
  • Anyone wanting modular cabling for a tidy build
  • Builders with many SATA drives or high-efficiency needs for an always-on PC
Read the full Corsair CX650 650W 80 PLUS Bronze ATX PSU review ›

Seasonic FOCUS GX-850 ATX 3 (2024)

  • + 10-year warranty, praised by owners
  • + Cybenetics Platinum efficiency despite the Gold label
  • + Fully modular with native 12V-2x6 cable
  • − Loose 12V load regulation per Hardware Busters
  • − Fan curve complaints; spins up early for some owners
  • − Cables reported as bulky or short

Skip it if:

  • Buyers who put tight 12 V voltage regulation first
  • Builders who need a consistently silent fan at low load
  • Anyone with a compact case who needs long, flexible cables
Read the full Seasonic FOCUS GX-850 ATX 3 (2024) review ›

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