Question What is the issue with the 3.3v

[mick1964]

Hi Guys,

I purchased this power supply but when I check it on my cheap psu checker the 3,3v led doesn't light up so can you guys check the readings as I don't know what they should be and suggest if its broken or not.[url=https://postimg.cc/CRFpkBJJ][/URL]

 

[Lutfij]

I purchased this power supply
We're going to need some context, what is the make and model of the PSU and it's age(if the PSU was bought used)?

 

[mick1964]

I purchased this power supply
We're going to need some context, what is the make and model of the PSU and it's age(if the PSU was bought used)?

The psu is a Cooler master 450watt silent pro Gold Product number RS-450-80GA-33 This was purchased used a few days ago so I don't know the age

 

[mick1964]

The psu is a Cooler master 450watt silent pro Gold Product number RS-450-80GA-33 This was purchased used a few days ago so I don't know the age

 

[drivinfast247]

It shows 3.3v on display. Maybe the tester is broken?

 

[mick1964]

It shows 3.3v on display. Maybe the tester is broken?

Yes I seen it said 3.3v on the tester, I just don't want to try it and break my parts. I suppose I will have to test my other psu and see if the led lights or not

 

[BFG-9000]

The lights on the left are for checking Molex and SATA connectors. It is correctly indicating your SATA has no +3.3v on it as only old PSUs would have that.

The screen is showing 3.3v present on the 24-pin connector

 

[mick1964]

The lights on the left are for checking Molex and SATA connectors. It is correctly indicating your SATA has no +3.3v on it as only old PSUs would have that.

The screen is showing 3.3v present on the 24-pin connector

So is it reporting correctly and safe to use ?

 

[BFG-9000]

So is it reporting correctly and safe to use ?

Well, those cheap testers only check for voltage under no load. So it's more like checking to see if all fingers are present than if they can play a piano. If the voltages are out of spec it will sound a buzzer. Perhaps you should at least read the seller's description if it was too cheap to come with a manual.

If you have plugged a Molex into it and 3.3v doesn't light up, that's normal as those have no orange wire.
If your PSU's SATA power connectors have the orange wire, then the 3.3v LED should light but that means any modern SATA drive with power disable feature will fail to work when plugged into that cable, unless you cut the wire. Or just use a Molex-to-SATA power adapter.
If you plug the SATA connector into it and the 3.3v doesn't light up, that means it is compatible with modern SATA drives.