Enough connectors for a Z390 MSI mobo (needs an extra 4pin/12V connector)?

I believe that it is one of 8pin power cables that plug half into the 4 pin connector on the motherboard. Look at plugs shapes and orientation and you will a match and there enough room to plug it in.

Will this psu work with rtx 3080?

Nvidia has stated that the 3080 requires 750 watt PSU to fully utilize its maximum performance.

Do you know what the electrical rating is?

Do you mean the 650 watts or the fact that it is rated at 80+ Gold?

I see the Z390 boards (MSI Tomahawk in particular) require an add'l 4pin 12V connector - pcpartspicker says this one will work. Can anybody confirm?

Works fine with the MSI Z390 Gaming Plus which look like has the same power connectors as the Tomahawk.

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CORSAIR RM Series RM650 CP-9020194-NA 650 W ATX12V SLI Ready 80 PLUS GOLD Certified Full Modular Power Supply

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Options: ATX 80+ Gold (650W)

ATX 80+ Gold (650W)
ATX 80+ Gold (750W)
ATX 80+ Gold (850W)

80 PLUS Gold Certified: High efficiency operation for lower power consumption, less noise and cooler temperatures.
Tuned for Low Noise Operation: A 140mm rifle bearing fan with a specially calculated fan curve ensures that fan noise is kept to a minimum, even at full load.
105°C-Rated Capacitors: Industrial-grade capacitors deliver solid electrical performance and reliability.
Microsoft Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
Zero RPM Fan Mode: At low and medium loads the cooling fan switches off entirely for near-silent operation.
Fully Modular Cables: Only connect the cables your system needs, making clean and tidy builds easier.
SLI Ready: Power multiple GPUs for maximum gaming performance.
Compact Size: A 160mm-long casing ensures an easy fit in almost all modern enthusiast PC cases.
Ten-Year Warranty: Your guarantee of reliable operation that will last across several system builds.

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

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General
Brand	CORSAIR
Series	RM Series RM650
Model	CP-9020194-NA

Details
Type	ATX12V
Maximum Power	650 W
Fans	1 x 140mm Rifle Bearing Fan
Main Connector	24Pin
+12V Rails	Single
PCI-Express Connector	4 x 6+2-Pin
SATA Power Connector	6
SLI	SLI Ready
Max PSU Length	160 mm
Modular	Full Modular
Energy-Efficient	80 PLUS GOLD Certified
Over Voltage Protection	Yes
Input Voltage	100 - 240 V
Input Frequency Range	47 - 63 Hz
Input Current	10 - 5 A
Output	+3.3V@20A, +5V@20A, +12V@54A, -12V@0.3A, +5VSB@3A
MTBF	100,000 Hours
Connectors	1 x ATX CABLE 24-PIN (24) 2 x EPS/ATX12V 8-PIN (4+4) 4 x PCIe 8-PIN (6+2) 6 x SATA 4 x PERIPHERAL (4-PIN)

Features
Features	80 PLUS Gold Certified: High efficiency operation for lower power consumption, less noise and cooler temperatures. Tuned for Low Noise Operation: A 140mm rifle bearing fan with a specially calculated fan curve ensures that fan noise is kept to a minimum, even at full load. 105°C-Rated Capacitors: Industrial-grade capacitors deliver solid electrical performance and reliability. Microsoft Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency. Zero RPM Fan Mode: At low and medium loads the cooling fan switches off entirely for near-silent operation. Fully Modular Cables: Only connect the cables your system needs, making clean and tidy builds easier. SLI Ready: Power multiple GPUs for maximum gaming performance. Compact Size: A 160mm-long casing ensures an easy fit in almost all modern enthusiast PC cases. Ten-Year Warranty: Your guarantee of reliable operation that will last across several system builds.

Dimension & Weight
Dimensions	3.39" x 5.91" x 6.30"
Weight	3.75 lbs.

Package
Package Content	RM Series Performance ATX Power Supply AC Power cord DC Modular Cable Set Cable Ties

Additional Information
First Listed on Newegg	November 15, 2025

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CORSAIR RM Series RM650 CP-9020194-NA 650 W ATX12V SLI Ready 80 PLUS GOLD Certified Full Modular Power Supply

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Customer Reviews of the Corsair CP-9020194-NA

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