Does this power supply unit work well with high-end graphic cards like the 4000 series?

Long Answer: So the 4000 series of Nvidia grabs usually around 450W during load/gaming session. Currently I am running Radeon 9070 XT that usually sits around 310W. It barely even touches this power supply being at 1200W in terms of power consumption and any NVIDIA card you put in should be just as fine. Short Answer: Yes

Is the PSU SeaSonic Vertex PX-1200 quiet when operating under heavy load?

The product features "Seasonic Hybrid Silent Fan Control," which ensures silence and safety, even under demanding conditions.

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Main image of Seasonic VERTEX PX-1200, 1200W 80+ Platinum, ATX 3.0&PCIe 5.0 Ready, Full-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 12 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible

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Alt view image 3 of 4 - Seasonic VERTEX PX-1200, 1200W 80+ Platinum, ATX 3.0&PCIe 5.0 Ready, Full-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 12 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible

Alt view image 4 of 4 - Seasonic VERTEX PX-1200, 1200W 80+ Platinum, ATX 3.0&PCIe 5.0 Ready, Full-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 12 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible

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Seasonic VERTEX PX-1200, 1200W 80+ Platinum, ATX 3.0&PCIe 5.0 Ready, Full-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 12 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible

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ATX 3.0 and 16-Pin Gen 5 PCIe Cable (12VHPWR)
Fully Modular Cabling Design
135 mm Fluid Dynamic Bearing (FDB) Fan
Seasonic Hybrid Silent Fan Control
Highly Reliable Japanese 105 °C Aluminum Electrolytic Capacitors
Tight Voltage Regulation (12 V, 5 V and 3.3 V) [± 3 %]
Ample +12 V Output
DC to DC Converter Design
Cable-free Connection Design
Gold-Plated High Current Terminals (MB, CPU and PCIe)
12 Years Warranty

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Overview

Specs

Reviews (148)

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Compatible with ATX 3.0 and PCIe 5.0 Standards

Seasonic Hybrid Silent Fan Control

Ensures silence and safety

Maximum Stability

Ideal for high-performance systems

PVC
Embossed
Cables

Comprehensive Accessories

12VHPWR cable included

General
Brand	SeaSonic
Model	VERTEX PX-1200

Details
Type	ATX
Maximum Power	1200 W
Fans	1 x 135 mm
PFC	Active
Max PSU Length	160 mm
Modular	Full Modular
Energy-Efficient	80 PLUS PLATINUM Certified
Over Voltage Protection	Yes
Input Voltage	100 - 240 V
Input Frequency Range	50/60 Hz
Input Current	15-7.5A
MTBF	100,000 hours
Approvals	cTUVus, TUV, CB, CCC, BSMI, EAC, CE

Dimension & Weight
Dimensions	6.3 L x 5.9 W x 3.4 H
Weight	4.34 lbs

Additional Information
First Listed on Newegg	September 07, 2023

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 12 years
Limited Warranty period (labor): 12 years
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Return Policies

Return for refund within: 30 days
Return for replacement within: 30 days
This item is covered by Newegg.com's 30-Day Return Policy.
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Seasonic VERTEX PX-1200, 1200W 80+ Platinum, ATX 3.0&PCIe 5.0 Ready, Full-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 12 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible