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Corsair CS Series CS850M ATX Power Supply

850W, 80 PLUS Gold, Semi-Modular, 3 Year Warranty

Corsair CS Series CS850M ATX Power Supply
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£109.98 inc vat

£91.65 ex vat

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Order Code: CSR-CS850M

Manf.Code: CP-9020086-UK

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Express Delivery

Free Delivery Available

Delivered within 3-5 working days

More delivery options including Weekend, timed and European delivery are also available at the checkout.

Low Rate 14.9% Finance

Spread the cost of your purchase with a low rate 14.9% APR over 12, 24 or 36 months.

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In the unlikey event that you are unhappy with your purchase, simply return it to us within 14 days for a refund.*

*Excludes delivery costs. Item must be in original condition, not applicable to opened Software/Licenses or customised items.

Full details

If you are buying for work or your business we offer a range of benefits to help, such as:

  • Credit Account Facilities (subject to approval)
  • ISO 9001/14001 Certification
  • Business Leasing
  • Members of major purchasing frameworks
  • Microsoft Gold Partner
  • VMWare Education Specialist
Find out more

Corsair CS Series CS850M ATX Power Supply overview

CS Series Modular power supplies are ideal for basic desktop systems where low energy use, low noise, and simple installation are essential. 80 PLUS Gold efficiency reduces operating cost and excess heat. Flat, sleeved black modular cables with clearly-marked connectors make installation fast and straightforward, with good-looking results. The flat, sleeved black cables are modular, so you’ll only use the cables you need and you’ll get great-looking results. The clearly-marked connectors make installation fast and straightforward. The super-efficient operation of the CS Series Modular results in lower energy use and lower operating costs. Since it generates less heat, the fan doesn’t need to work as hard, and you’ll enjoy near silent operation.

Power Specification

This power supply conforms to the Ecos 80 PLUS Gold certification


Power Output Specifications
+3.3V Rail 25A (130W)
+5V Rail 25A (130W)
+12V Rail 70.8A (849.6W)
+5Vsb Rail 3.0A (15W)
-12V Rail 0.8A (9.6W)
Total Power Output 850W @ +40C

Power Input Specifications
Input Voltage 100-240 VAC
AC Input 12-6A
Input Frequency Range 47 - 63 Hz
Efficiency 82% Typical

Power Connector Specification
24 Pin ATX 1x (Non-Modular Cable)
EPS (CPU) 1x (Non-Modular Cable)
PCIE 4x (Modular Cable)
SATA 8x (Modular Cable)
4-Pin 8x (Modular Cable)
Floppy 2x (Modular Cable)

General Specification
Operating Temperature 0C - 50C
MTBF 150,000 Hours
Size 86mm (H) x 150mm (W) x 160mm (L)
Fan Size 120mm Thermally Controlled Sleeve Fan
Warranty 3 Years

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Delivery Options

Next Working Day Delivery

Get your order delivered the next working day for £5.99, available when ordering Monday - Thursday and before 17:00 on that day if the product is in stock and your payment has cleared.

Pre 12 Next Working Day Delivery

Get your order delivered the next working day before 12:00pm for £8.38, available when ordering Monday - Thursday and before 17:00 on that day if the product is in stock and your payment has cleared. Some orders if via PayPal and the first customer order may not clear in time.

Weekend Delivery - Saturday & Sunday

If you need your order at the weekend, for £9.98, you can specify the day you wish to have it delivered to you, Saturday or Sunday providing your order has been placed by 17:00 on the Friday before.

Economy Delivery

Economy delivery is available on all orders of any value being shipped within the UK.

Reviews of the Corsair CS Series CS850M ATX Power Supply