Will it fit in hp prodesk 400 g4 ?

No. This is an sfx unit for use in sfx,matx,or atx (with adapter). The hp uses a special small form factor slim power supply. Unless hp offers a higher wattage supply. You are out of luck.

Will it work / fit with https://www.amazon.com/gp/product/b077rpsmys/ref=oh_aui_search_detailpage?ie=utf8&psc=1

This power supply has following dimensions: 5 inches long 4 inches wide 2.5 inches high

I don't see a light indicator when it is plugged in, does it have one or you have to guess if it is working?

There is no light indicator for this power supply model. The way to tell if power supply is turned on is if the power supply fan spins or if your computer boots up after connecting all the cables correctly.

This is a question for the manufacturer, apevia. have you considered releasing a 500 watt sfx 80 plus bronze certified psu?

They make a 600W, that is barely more expensive than the 400W model

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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SFX-AP400W Mini ITX Solution / Micro ATX / SFX 400W Power Supply

Product ID: 37038669

Details

Brand
Apevia
Compatible Devices
Personal
Connector Type
floppy molex
Cooling Method
Air
Form Factor
Atx Micro Mini
Item Weight
921 Grams

⚡400W steady output

🔌Comprehensive sleeved connectors

🧊80mm thermal sensing fan

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NZ$118

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your compact rig with silent strength!

SLEEK DURABLE - All cables sleeved for enhanced durability and clean cable management
COMPACT POWERHOUSE - 400W output tailored for Mini ITX & Micro ATX builds
WHISPER QUIET COOLING - 80mm auto thermal sensing fan keeps noise minimal and temps optimal
PLUG PLAY CONFIDENCE - Reliable Apevia brand with a 1-year warranty to power your next build worry-free
VERSATILE CONNECTIVITY - Includes 20+4pin, PCIe 6/8pin, SATA, Molex & floppy connectors for all your peripherals

The Apevia SFX-AP400W is a 400W power supply designed for small form factor PCs like Mini ITX and Micro ATX. It features an 80mm automatic thermal sensing fan for quiet, efficient cooling, fully sleeved cables for durability, and a wide range of connectors including 20+4pin main power, PCIe, SATA, Molex, and floppy. Ideal for modern compact builds needing reliable, steady power with minimal noise.

Specifications

ASIN	B01MEDG1PM
Best Sellers Rank	#533 in Computer Power Supplies
Brand	Apevia
Built-In Media	Power Supply
Compatible Devices	Personal Computer
Connector Type Used on Cable	floppy,molex,pcie,sata
Cooling Method	Air
Customer Reviews	3.9 3.9 out of 5 stars (516)
Fan Size	80 Millimeters
Form Factor	Atx,Micro,Mini,Sfx
Global Trade Identification Number	00837344004872
Item Dimensions	5 x 4 x 2.5 inches
Item Type Name	Power Supply
Item Weight	921 Grams
Manufacturer	Apevia
Maximum Input Voltage	230 Volts (AC)
Mfr Part Number	SFX-AP400W
Minimum Input Voltage	100 Volts
Model Name	FBA_SFX-AP400WÂ
Model Number	SFX-AP400W
Number of Fans	1
Output Wattage	400 Watts
Power Supply Design	Non-Modular
System Bus Connector Type	20+4 Pin
UPC	837344004872
Unit Count	1.0 Count
Warranty Description	1 Year
Wattage	400 watts

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