XPS 410/Dimension 9200, PSU troubleshooting?

My geeky friend could not make it after all. 

Could you help me with a decision on getting another PSU? On page 1 of this topic a person called speedstep posted links on a number of units, but I'm not certain about the information. I did not understand any of what he talked about, but he said:

You need a specifc EPS 12v  PFC 80 percent or better power supply. The one that works without issue is EVGA Super Nova B1 110-B1-0750-VR  or  700B1

The B2  B3 BR BT BQ GQ G2 etc models of the same thing DO NOT WORK.

The reason is quite simple  You need 25A or more on the 3.3v and 5v rails as well as 150W combined power on those rails. You also need at least 3AMPS on the 5vSB rail. That means a 550 or 650W unit will not work.

Then he gave several links. That first one is only 59.99. But can I use a 700w or 750w when it only has a 375w in it now? I really don't want to order another one of the one I'm going to send back. Besides, this one speedstop suggested has a 3-year warranty and this one I have now, which doesn't work, did not. I want to get something ordered, put in and find out if PSU is the solution. If not, then I'm done.

Thank you for info about the processor. It will all help me to make a decision when purchasing a computer.

I"m replyig to a post made by speedstop. You explained how I "need 25A or more on the 3.3v and 5v rails as well as 150W combined power on those rails. You also need at least 3AMPS on the 5vSB rail."

Then you gave me some links, however when I follow the links and look at the charts, it's showing only 20A on the 5v and 24A on the 3.3v so I'm completely confused. Could you contact me on this and clarify so I can get a new power supply ordered as it was discovered the one I just ordered was dead on arrival.

There are other power supplies in the same Series that have 120W or LESS combined power on the 3.3v/5v rails.  I do not know of any vendor that will allow you to draw the max current on each rail.  Volts X AMPS = WATTS  so 5 volts at 20 AMPS = 100W  3.3v X 15 = 50W  12V X 48 Amps = 585W   The problem is that the 5VSB uses at least 3Amps which is 15W

the -12v rail usually has 10W  (The PC does not operate in a Vaccuum) The CPU uses 65 to 95W.  This must be subtracted from the 12v @ 48 AMPS.  The hard Drive uses power, The Ram uses power, etc.

If you buy a power supply that has LESS THAN on any rail it won't work.

There are many many complaints about supplies not working.   I have used a 700B1 and a 750B1 in my dells as have others and they worked fine.

Power supplies are not a single connector with a single rail and a single spec of Watts.

All dell power supplies are 80 plus units which is why ATX is not ok and EPS 12v is.  The 375W unit has 150W on the 3.3v/5v rails COMBINED and lists 22Amps on the 5v Rails.  Dell Power supply current GOES UP on these rails as in the DELL 875 W Unit where the COMBINED power is 225W with 32A on the 5v rail and 30A on the 3.3v Rail.

Other vendors Claim to have 650 750 850 1000W units but they skimp on those rails specifically and in many cases this means the units DO NOT WORK.  The EVGA 750 B1 has been tested in many models of dell from 2006 to 2018 and works just fine.  You are free to buy any power supply from any vendor but the result may be a non working dell or worse the supply fries from over current and EATS everything, CPU, RAM, Hard Drive etc.  Usually takes LESS THAN 20 seconds before a loud POP then a motherboard fire.

 DELL 375W

DELL 875W

This is the Label on the 700B1  the $59 power supply. Combined power on the 3.3v/5v Rails is 150W.  5VSB is 3 Amps which is 15W and its an 80 percent Efficient EPS12v power supply. 

You keep coming at me with all these figures and facts. I"m not opposed to learning something, but right now I need to order a PS, and I repeat, you said I have to have a unit with 25A on both the 3.3v and 5v, Then you direct me to the $59.99 unit, which states only 20A and 24A. So which is right? If it needs to have 25A on both as you said originally, then it doesn't look to me like this one will work because it doesn't have 25A on both.

p.s. I just read through your last post again and I think you might be trying to tell me that as long as it has 150W combined, that is more important than the amps, so this unit with the 20A and 24A will work because it has 150W combined.  ???

The 750B1 has 25A listed on those rails.  The 750BQ from the same vendor has issues.  Others have used the 700B1 I have not YMMV.

This is my last post on this matter. Done beating the dead horse.

Feel free to buy any power supply you want. Dell only supports the unit that came with your dell from dell.

https://www.amazon.com/EVGA-SuperNOVA-Modular-Warranty-110-B1-0750-VR/dp/B00K85X23O/

750B1 SUPER NOVA

The $99 WORKS THE $69 DOES NOT

Let's back up....

Wasn't the replacement PSU you bought on Amazon the same Dell part number PSU as the one you're replacing?

If that same PSU has worked for all these years in this PC, an exact replacement should also work, assuming the replacement PSU isn't DOA.  So maybe you should just look for that same Dell part number from a different source than the one on Amazon, and keep things simple.

This is the label from the EVGA 500W1 100-W1-0500-KR  People buy this all the time because its $39. Then they demand to know why it doesnt work at all as a replacement for a DELL 305W or 375W power supply.  Because they base a power supply specifications on a Single Spec of WATTS and ATX 12V  vs EPS 12v 80

They make their choice based on price not actual specifications.

Note it still says 20A on 5v and 24A on 3.3v

HOWEVER the COMBINED is only 120W

Even a 305W Dell lists 150W COMBINED on the 3.3v/5v Rails.

You cannot use 100 percent on all rails at the same time. If you could then the 750B1 says 80 AMPS on the 12v Rails which is 960W which is not real. Its more like 15.4 Amps on 4 rails which is 61  The COMBINED output is a more important SPEC than Amps Listed because you cannot use 100 percent.

750 B1

DELL 305W

It was discovered that the PS I ordered was doa. It had a test light on it that never did light up. I talked with Amazon and they said it should light if the unit is good. But EVGA actually sounds like a better unit. For one thing it has a 3 year warranty and the one I ordered before, which was more expensive, did not. 

So basically you get what you paid for. If they can't snow you with hype they try to confuse you. What else is new?......

I don't understand your post at all. Can you explain please?

I would already have placed the order for one of the two you gave me links for, if it wouldn't have been for the discrepancy between what you told me about the 25A requirement on both 3.3v & 5v rails, and what shows on the chart on Amazon for this item, which is 20A amd 24A. That's what threw me off. 

I do not understand anything about all the facts and figures you gave me. I'm looking for help because I have no knowledge of these matters.

I opened am account in the EVGA forum and just got an answer that the $59.99 EVGA which speedstop gave me a link for will work so I just ordered it. It should be here Thursday and then I guess we will find out it it's the power supply or if I will be sending another one back. 

I wish I could find a schematic of the wiring from the PSU inside the unit. If anyone reading this knows where I can find one online please advise.

Power Supplies are not user serviceable parts.  There is Death in there Especially if the supply is not working.

The mains capacitors carry enough of a charge to kill you in less than 1 second.

DANGER WILL ROBINSON