Skip to main content
Corsair CP-9020140-UK HX1200 1200 W 80+ Platinum Fully Modular Power Supply Unit - Black

Corsair CP-9020140-UK HX1200 1200 W 80+ Platinum Fully Modular Power Supply Unit - Black

Bottom line: The Corsair CP-9020140-UK HX1200 1200 W 80+ Platinum Fully Modular Power: 80 PLUS Platinum: 90% efficiency at real-world load, less heat and lower power draw; main trade-off: 1200W is overkill for most single-GPU builds under 400W total draw.

Check price on Amazon

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Check price on Amazon → Compare to similar power supplies

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ 80 PLUS Platinum: 90% efficiency at real-world load, less heat and lower power draw
  • ✓ ZeroRPM mode keeps the 135mm fan fully stopped under light and idle loads
  • ✓ All Japanese 105C capacitors and tight voltage regulation for 24/7 high-load rigs
  • ✓ 1200W headroom covers a 5090-class GPU plus an overclocked CPU with room to spare
  • ✓ Fully modular cable set cuts chassis clutter and improves airflow behind the tray

Cons

  • ✗ 1200W is overkill for most single-GPU builds under 400W total draw
  • ✗ No native 12VHPWR/12V-2x6 connector listed, so a GPU adapter is likely needed
  • ✗ 135mm fan depth and long body need a case with generous PSU-bay clearance
  • ✗ UK-market SKU (CP-9020140-UK), so verify the bundled power cord matches your outlets

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored Corsair CP-9020140-UK HX1200 1200 W 80+ Platinum Fully Modular Power… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Compare with similarly-priced alternatives in the power supplies category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • 80 PLUS Platinum efficiency, delivering 90 percent energy efficiency at real world load conditions.
  • ZeroRPM mode for fanless operation at low loads and outstanding noise reduction.
  • 135mm thermally controlled, fluid dynamic bearing fan only spins up as needed.
  • Fully modular cables for easy installation, less clutter, and helps maximize airflow through your computer’s chassis.

Full Specifications

BrandCorsair
ColorBlack
Wattage1200 watts
Model NamePower Supply
Form FactorATX
Connector TypeATX, EPS
Cooling MethodAir
Output Wattage1200 watts
Compatible Devicescomputer
Item dimensions L x W x H15.35 x 8.66 x 5.91 inches

Ready to buy?

Corsair CP-9020140-UK HX1200 1200 W 80+ Platinum Fully Modular Power Supply Unit - Black is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Check price on Amazon →

Related Power Supplies

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
Corsair CP-9020140-UK HX1200 1200 W 80+ Platinum Fully Modular Power Supply Unit - Black
View on Amazon →