DPS-1200FB PSU "excessively silent"

[Marburg57]

Hi community

I just bought at a chinese retailer a DPS-1200FB PSU.

It sounds to run normally except that :

1° When powering on, it does not do the usual cycle with fan running @ max few minutes. Instead, it stays quiet, running at very low RPM, almost impossible to hear.
2° When loaded ~600/700W, the fan remains at the same stock speed than without any load. However the metal case become very hot. ( Impossible to let finger more than a second on )
To prevent any frying I set on top 2 heatsink cooled with 120mm as a temporary solution.
3° Last but not least, output airflow smells hot compound, something like fried than shouldn't be that much to my mind.
I don't tell it's burning, but it has sucpicious smell.
4° The more I let the PSU without cooling, the more my rig tends to crash

Do you think this PSU has been tweaked and sold with low noise adjustment for popular need ( noise killing )?
Is it about to die because of worn out ?

Any advice appreciated and moreover the mod consisting of raising fan level

Friendly

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[philipma1957]

return it for a refund.

are you usa based?

[batsonxl]

Stop using that psu immediately and protect your rig. i can imagine if you cant touch it then what temp it is inside.
If you are looking cheap psu solution you can get 1 750w good psu + server psu
or 750w+750w psu.

[Marburg57]

@ philipma1957

Ok, working on it AliExpress seller, hope it will go well
No I am based in France

@Bastonxl

Component should be indeed very hot inside :/
750W + 750W was my fallback idea

Thanks @

[anu1908]

it definitely sounds like a dying psu. either it's refurbished or a faulty device. which retailer is it? maybe you can share it here so people van give more feedback and avoid buying from them before your issue is resolved.

[Marburg57]

The PSU is refurbished, that is for sure. The 12V golden plate of the PSU has evident shape of wearing.

Here's informations asked :

The seller is Professional Accessories Store
https://www.aliexpress.com/store/5717030?spm=a2g0o.store_pc_home.1000001.12.57f41933vpBmYn

It has however good global marking

The item bought is a bundle composed of 1x breakout board, 12x PCIE cables, 1x 1200FB PSU
https://www.aliexpress.com/item/1005002484778028.html?spm=a2g0s.9042311.0.0.495a6c37zQI9Ii

I am currently printing a 40 to 70mm fan duct to set an additional air extraction with a 70mm Delta fan.
 

[FP91G]

I would pay extra $ 100-150 more and buy a new ATX power supply unit Corsair for 1200 watts or 2 Corsairs for 750 watts.
I would buy a server block only if I need a lot of 6-pin or 8-pin connectors and ATX blocks do not have enough of them.
You should not save money when buying power supplies, the losses can be much greater.

[Marburg57]

As this PSU had evident thermal regulation problems, the seller fully refund me. Wanted to share it.
Waste of time, but not of money.

Thanks for your help  

I would pay extra $ 100-150 more and buy a new ATX power supply unit Corsair for 1200 watts or 2 Corsairs for 750 watts.
I would buy a server block only if I need a lot of 6-pin or 8-pin connectors and ATX blocks do not have enough of them.
You should not save money when buying power supplies, the losses can be much greater.

$100-150 extra for Corsair ? Huh it's more like $300
Indeed I need 12x 6/8 pin connectors

Stop buying chinese craps!

Buy EVGA, Seasonic, Corsair.

Troll ?
This 1200FB is known to be the best mining one. Unfortunately everybody need it, so it becomes hard to get a rock stable or brand new one. Not ready to spend $350 in 70% exploited PSU
Is there any PSU not chinese in the world ?  

[Philipma1957cellphone]

As this PSU had evident thermal regulation problems, the seller fully refund me. Wanted to share it.
Waste of time, but not of money.

Thanks for your help  

I would pay extra $ 100-150 more and buy a new ATX power supply unit Corsair for 1200 watts or 2 Corsairs for 750 watts.
I would buy a server block only if I need a lot of 6-pin or 8-pin connectors and ATX blocks do not have enough of them.
You should not save money when buying power supplies, the losses can be much greater.

$100-150 extra for Corsair ? Huh it's more like $300
Indeed I need 12x 6/8 pin connectors

Stop buying chinese craps!

Buy EVGA, Seasonic, Corsair.

Troll ?
This 1200FB is known to be the best mining one. Unfortunately everybody need it, so it becomes hard to get a rock stable or brand new one. Not ready to spend $350 in 70% exploited PSU
Is there any PSU not chinese in the world ?  

I dont have any merits to give. But when I get to my main account I will do so. Thanks for follow up.

[batsonxl]

As this PSU had evident thermal regulation problems, the seller fully refund me. Wanted to share it.
Waste of time, but not of money.

Thanks for your help  

I would pay extra $ 100-150 more and buy a new ATX power supply unit Corsair for 1200 watts or 2 Corsairs for 750 watts.
I would buy a server block only if I need a lot of 6-pin or 8-pin connectors and ATX blocks do not have enough of them.
You should not save money when buying power supplies, the losses can be much greater.

$100-150 extra for Corsair ? Huh it's more like $300
Indeed I need 12x 6/8 pin connectors

Stop buying chinese craps!

Buy EVGA, Seasonic, Corsair.

Troll ?
This 1200FB is known to be the best mining one. Unfortunately everybody need it, so it becomes hard to get a rock stable or brand new one. Not ready to spend $350 in 70% exploited PSU
Is there any PSU not chinese in the world ?  

I dont have any merits to give. But when I get to my main account I will do so. Thanks for follow up.

I have in my collection 2 chinese psu they are working fine many years now. But it doesnt mean all chinese psu are good(it is wiritten 1600w but noway after i reach 1000w it gets hot so im kepping them at 800-900w. you must test before buy or buy 1 and test. then order 2nd. Im using them for cheap cards polaris.
After i started using server psus im not looking anymore at high price psu. im buying normal 750w and + server psu doing my own cables even doing add2psu by myself.

[FP91G]

As this PSU had evident thermal regulation problems, the seller fully refund me. Wanted to share it.
Waste of time, but not of money.

Thanks for your help  

I would pay extra $ 100-150 more and buy a new ATX power supply unit Corsair for 1200 watts or 2 Corsairs for 750 watts.
I would buy a server block only if I need a lot of 6-pin or 8-pin connectors and ATX blocks do not have enough of them.
You should not save money when buying power supplies, the losses can be much greater.

$100-150 extra for Corsair ? Huh it's more like $300
Indeed I need 12x 6/8 pin connectors

Stop buying chinese craps!

Buy EVGA, Seasonic, Corsair.

Troll ?
This 1200FB is known to be the best mining one. Unfortunately everybody need it, so it becomes hard to get a rock stable or brand new one. Not ready to spend $350 in 70% exploited PSU
Is there any PSU not chinese in the world ?  

I dont have any merits to give. But when I get to my main account I will do so. Thanks for follow up.

I have in my collection 2 chinese psu they are working fine many years now. But it doesnt mean all chinese psu are good(it is wiritten 1600w but noway after i reach 1000w it gets hot so im kepping them at 800-900w. you must test before buy or buy 1 and test. then order 2nd. Im using them for cheap cards polaris.
After i started using server psus im not looking anymore at high price psu. im buying normal 750w and + server psu doing my own cables even doing add2psu by myself.

It all depends on the offers on the market. Now you can drink good blocks with a 5-10 year warranty in any store.
It won't be a mistake to overpay the extra $ 100 for a good PSU.
When new branded power supplies are very expensive, then it is already worth looking at what is sold in China.

[philipma1957]

As this PSU had evident thermal regulation problems, the seller fully refund me. Wanted to share it.
Waste of time, but not of money.

Thanks for your help  

I would pay extra $ 100-150 more and buy a new ATX power supply unit Corsair for 1200 watts or 2 Corsairs for 750 watts.
I would buy a server block only if I need a lot of 6-pin or 8-pin connectors and ATX blocks do not have enough of them.
You should not save money when buying power supplies, the losses can be much greater.

$100-150 extra for Corsair ? Huh it's more like $300
Indeed I need 12x 6/8 pin connectors

Stop buying chinese craps!

Buy EVGA, Seasonic, Corsair.

Troll ?
This 1200FB is known to be the best mining one. Unfortunately everybody need it, so it becomes hard to get a rock stable or brand new one. Not ready to spend $350 in 70% exploited PSU
Is there any PSU not chinese in the world ?  

Here is a merit.

Keep posting you will make rank.