Is compatible with an old z390 mb - core i9-9990 (for now, i will upgrade within six months to z790)? thanks.

Yes, this power supply will work with older hardware as well.

I am replacing an inwin cb1250 with this psu. can i use the cables from the inwin and not need to run the seasonic cables to the mb and sata drive?

Cable pinouts from different brands could be vastly different even if the connectors are the same on the power supply side. So please use only the cables that come with the HELA 1200R Platinum.

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SilverStone Technology HELA 1200R Platinum ATX 3.0 / PCIe Gen 5 1200W Fully Modular Power Supply, SST-HA1200R-PM

Product ID: 516508448

Details

Brand
SilverStone
Compatible devices
Personal
Connector type
ATX PCI
Model name
HELA 1200R
Output wattage
1200 Watts

⚡1200W Platinum Power

🔌Gen5 12VHPWR PCIe Connector

❄️Ultra-quiet 135mm FDB Fan

SilverStone Technology HELA 1200R Platinum ATX 3.0 / PCIe Gen 5 1200W Fully Modular Power Supply, SST-HA1200R-PM

Product ID: 516508448

Details

Brand
SilverStone
Compatible devices
Personal
Connector type
ATX PCI
Model name
HELA 1200R
Output wattage
1200 Watts

⚡1200W Platinum Power

🔌Gen5 12VHPWR PCIe Connector

❄️Ultra-quiet 135mm FDB Fan

Description

⚡ Power your future with Platinum precision and whisper-quiet confidence!

BUILT TO ENDURE - 24/7 continuous 1200W output at 50°C ensures unwavering performance in demanding setups.
COOL SILENT OPERATION - 135mm fluid dynamic bearing fan with semi-fanless mode keeps noise near zero under load.
NEXT GEN PC IE GEN 5 READY - Equipped with the latest 12VHPWR connector, fully compliant with Intel ATX 3.0 standards.
PREMIUM JAPANESE COMPONENTS - All Japanese electrolytic capacitors guarantee long-lasting stability and durability.
PLATINUM EFFICIENCY POWERHOUSE - Cybenetics Platinum certified for elite energy savings and reliability.

The SilverStone HELA 1200R Platinum is a fully modular 1200W ATX 3.0 power supply featuring cutting-edge PCIe Gen5 12VHPWR connectivity, Cybenetics Platinum efficiency, and a whisper-quiet 135mm FDB fan with semi-fanless operation. Designed for continuous 24/7 performance at elevated temperatures, it uses premium Japanese capacitors to ensure maximum reliability and longevity.

Specifications

ASIN	B0BKQZJ3QK
Brand	SilverStone
Compatible Devices	Personal Computer
Connector Quantity	1
Connector Type Used on Cable	ATX, PCI Express
Cooling Method	Air
Customer Reviews	4.0 4.0 out of 5 stars (41)
Fan Size	135 Millimeters
Form Factor	ATX
Item Dimensions	15 x 15 x 8.6 centimeters
Item Weight	3.69 Kilograms
Manufacturer	SilverStone Technology
Maximum Input Voltage	107 Volts
Mfr Part Number	SST-AX1200MCPT-A
Minimum Input Voltage	100 Volts
Model Name	HELA 1200R Platinum
Model Number	SST-AX1200MCPT-A
Number of Fans	1
Number of Items	1
Output Wattage	1200 Watts
Power Supply Design	Full Modular
System Bus Connector Type	12VHPWR
UPC	844761025564
Upper Temperature Rating	50 Degrees Celsius
Wattage	1200 watts

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