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Compare Corsair AX1200i 1200W Fully Modular 80+ Platinum vs RM850x Shift 2025

Corsair AX1200i 1200W Fully Modular 80+ Platinum and CORSAIR RM850x Shift 2025 are both power supplies with the same EPS Connectors (2). The main differences are in Wattage, Modular, PCI-Express 16 Pin 12VHPWR Connectors and PCI-Express 6+2 Pin Connectors.

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Corsair AX1200i 1200W Fully Modular 80+ Platinum

CORSAIR RM850x Shift 2025

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In Stock

Last updated 51 minutes ago.

In Stock

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Brand

Corsair

Brand

Corsair

Model

AX1200i
CP-9020008-NA
CP-9020008-UK
CMPSU-AX1200i
CP-9020008-AU

Model

CP-9020299-NA
CP-9020299-EU
CP-9020299-UK
CP-9020299-AU

Release Date

📅 July 2012

Release Date

📅 November 2025

* First availability for purchase, it may not correspond to the actual market launch date.

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Compatible PC parts

Graphics Cards ► Cases ►

Compatible PC parts

Graphics Cards ► Cases ►

Wattage

1200 W

Wattage

850 W

Type

ATX

Type

ATX

Modular

Full

Modular

Full Shifted

Efficiency

80+ Platinum

Efficiency

-

Output

+3.3V@30A, +5V@30A, +12V@100.4A, -12V@0.8A, +5VSB@3.5A

Output

-

PCI-Express 16 Pin 12VHPWR Connectors

0

PCI-Express 16 Pin 12VHPWR Connectors

1

PCI-Express 12 Pin Connectors

0

PCI-Express 12 Pin Connectors

0

PCI-Express 6+2 Pin Connectors

8

PCI-Express 6+2 Pin Connectors

4

PCI-Express 6 Pin Connectors

0

PCI-Express 6 Pin Connectors

0

EPS Connectors

2

EPS Connectors

2

SATA Connectors

16

SATA Connectors

9

Molex Connectors

12

Molex Connectors

4

Length

200 mm

Length

160 mm

Options (2)

	860W $229.99
	1500W $449.99

-

Comparison and key differences summary

Reasons to buy the Corsair AX1200i 1200W Fully Modular 80+ Platinum:

+350 Watts available
+4 PCI-Express 6+2 Pin connectors available
+7 SATA connectors available
+8 Molex connectors available

Reasons to buy the CORSAIR RM850x Shift 2025:

70% cheaper, you can save $349.01
Newer Product, it was released around 13 years later

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