Precision t3600 power supply upgrade not working

Question

I got a t3600 and tried upgrading the power supply from the 425w one it came with to a 685w power supply but it won't turn on with it. When the new power supply is not in the computer and I plug it in and press the button on the back the light on it turns solid green, but it stays completely off when I do the same with it in the computer. I switched back to the 425w one and it runs fine. I checked where I bought the 685w one and it says that it should be compatible. Help would be much appreciated

bmcowboy · Accepted Answer

Hi @AllDemSpiders ,

I'm sorry but you may got a wrong PSU for your T3600.

When searching "Dell 685w" and you'll find PSU for T5810/T7810/T7910 (DP/N K8CDY & CYP9P). All Precision tower connect PSU and motherboard through a power distribution board like the followings:

Power Distribution Board for T3600

Power Distribution Board for T5810/T7810/T7910

You can see that design of these two PD board are different and thus the corresponding PSU would not be inter-changeable. No 685w PSU designed for T3600 PD board unfortunately. The correct PSU options for T3600 should be:

- 635w (DP/N 1K45H & NVC7F) Reference here

- 825w (DP/N 6MKJ9 & RHHKV) Reference here

- 1300w (DP/N H3HY3) Reference here

Hopefully information above helps in choosing the correct PSU for you.

bradthetechnut · Answer

Hi @AllDemSpiders,

What brand of PSU did you get? Compare labels on the PSU's. It's not about a single wattage. Other brand PSU's often shortcut the 3.3v/5v rails with less power as compared to Dell PSU's, even though total watts may be higher.

700w or higher EVGA B1 or BR PSU's often come recommended if using non-Dell brand. The catch? They've been hard to come by during the pandemic for some reason. Corsair's CX series are also good.

Please see screengrab for EVGA 700 BR. Do the 3.3v/5v rails meet or exceed power as compared to original PSU? By chance if not, higher wattages may be available. I say "may be" due to pandemic. If you go searching EVGA, caution, has to be B1 or BR to have enough power on those rails.

Capture+_2020-07-04-15-38-24.png

AllDemSpiders · Answer

The PSU is Dell brand

AllDemSpiders · Answer

I will try this and let you know how it goes. I found a reddit post with a diagram for the layout of the Dell 24 pin connector next to a standard ATX one so as a last resort I can make an adapter.

bradthetechnut · Answer

Would the 24-pin connection be a mini 24-pin?  They do make an adapter for that.  Either way, whatever adapter you can think of, Google it and they probably made it already.

bradthetechnut · Answer

Good deal.

AllDemSpiders · Answer

Update: The new PSU worked! Thank you all so much!

LuBos-S · Answer

Hello @bmcowboy

I see you are a Pro on this topic, and many more obviously. So, i was hoping you could help me with a similar question.

I have a Precision T3610 with a 685W power supply (original P/N - YP00X). I would need to upgrade it - ideally to 1300W. I searched the whole internet and each time i found a P/N and I thought would be correct, I found another source which brought some doubts...

I even called the Dell support, but as the machine does not have support anymore, I did not get any answer from them.

Would you please be able to help? I thought H3HY3 would be correct.

Thanks a lot

Lubo

bmcowboy · Answer

Hi @LuBos-S ,

As per @DELL-Chris M replied on another thread here, factory designed PSU for T3610 comes with 425W and 685W only.

Precision T3610 =
YP00X Delta 685W
WPVG2 Flextronics 685W
03MFJ Delta 425W
FFD0H Acbel 425W

However, those PSU are in same module design as 825W or even 1300W. You may give them a try at your own risk.

CMTan · Answer

Let me try to help. For your information, I do not have a T3610 but I do have a T3600. The H3YH3, MF4N5, 06MKJ9 are suitable for T3600, but I am not sure if it is suitable for T3610. However, there is one way to check this.

Pull out the PSU from the Dell PC, the voltage specification must match.

For T3600 ( NVC7F or 1K45H) or the Dell 1300W PSU, models H3YH3, MF4N5, 06MKJ9 has the following speciofications

+12V

-12V

+5VSB

From what I know 685W is of the following specifications below

+12V

-12V

+12VSB

This is different from those of T3600 or H3YH3. These are for T7910, T7810, T5810. I believe it is also for T3610.

Check your Dell T3610 specification, and you will be able to confirm if the PSU above is usable.

The suitable 1300W model for T7910, T7810, T5810 (I think including T3610) is 0T31JM (This one has +12VSB)

If you think that you only need to raise the power supply rating in T3610 in order to draw more power from the power supply, you are only half the correct answer. There is no way for the T3610 existing PCIe connector to deliver the additional power. You will need to change the connectors connecting to the power supply to that used in T7810, so that there is additional contact connecting to the PSU and also additional PCIe connectors on the connector boards.

_Zaphod77_ · Answer

Yeah, messing with power supplies are a pain.

Even among the same wattage, you must get one that both fits in the case, and supports the power distribution board.

For example many 685 watt power supplies do not actually fit in the t3610 case. the track is slightly offset. and the pins on the connector are also different, so even if it did fit it wouldn't work.

If your power supply does fit in the case, it still needs a distribution board it's compatible with. ideally one that has the same number of cpu connectors on it.

Clearly the t3600 case shared the case design with one other case. i'm not sure if it's the t3610 case, or another one. if so, you should be able to get more power into a t3610 by grabbing a t3600 distribution board and power supply. but you still will only have the one 8 pin pci-e power connector on the distribution board.

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Precision t3600 power supply upgrade not working

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