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Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.
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Is there still no power supply upgrade available
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Nope No hope.
I had an idea of altering the wiring and doing it by myself by splicing wires  but the shop i bought decided to give me a replacement to any dell system instead.

 

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Use an adaptor for your 2nd power supply, that's what worked for me.

http://www.ebay.com/itm/like/111284841995?lpid=82
5.00 after all my searching I found the answer, it's not pretty but it works.

Plug one of your SATA power plugs (from your current power supply) into the cable that comes with it, plug in your new ATX power supply ATX plug into the adaptor and you are good to go. When your old power supply turns on the adaptor will turn on your new one, it's awesome.

Add2PSU is another popular adaptor http://www.add2psu.com/

You could buy a dedicated power supply if you can find one but I don’t recommend it, they are expensive, make a lot of heat and noise.

This was a nightmare for me and I don’t want other people having to go through what I did.

Good luck.

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I came across this discussion and wanted to thank you for posting your suggestion.  I think this will work for me as well.  I have a couple of questions, and was hoping to get your opinion...

 

1.  Where did you mount the second power supply?  I was thinking about just placing it on the bottom of the case, but wasn't sure if it would be ventilated enough, or cause any heat issues.

 

2.  How did you run the power cable from the power supply out of the case?

 

Something like the following would be ideal, but it's out of stock:

 

http://www.fspgroupusa.com/ecommerce/booster-x5.html

 

Thanks!

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I thought about using that too, thought it looked real cool and would fit neatly in my case.

All of those things are true but I saw a review on it and that made me change my mindhttp://www.hardocp.com/article/2011/01/24/epower_juice_box_450w_auxiliary_power_supply_review/#.VI0WFMnZpSV

 

Here is another good article on power supply optionshttp://www.hardocp.com/article/2011/08/24/black_art_dual_psus_in_your_enthusiast_pc/7#.VI0OaMnZp8c

 

My main objective for me was to get my videocard running (using the adaptor & new P/S) then after I did that I realized that I had plenty of juice left so I powered my DVD drive too taking some load off my origanal power supply. it's worked great for me so far, but my PC isn't as pretty as some but I don't care, it screams and that's what makes me happy.

 

If you have the same HP computer as I do I do NOT sugest you go with the booster (read the report).

You can spend a little extra money and get a power supply that is modular, meaning you won't have a bunch of wires in the way of closing the lid. I was able to close mine but it made it very hard to re-open (I just leave it open now).

 

Other bennifits of not having the P/S inside your case is that the heat does not contribute to the other heat already being produced, it's outside so does not affect your system.  Also if you ever want to go bigger just buy another ATX power supply and the adaptor can handle it.

 

I beleave that the boosters are just good enough, no more and sometimes less; get the adaptor and a ATX power supply of your choice.

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I might just add a note to your excellent suggestion, that you also need to connect the +12vsb to the +12 rail from the ATX PSU. There seems to be some logic on the board that requires this to be high before the power button on the front powers up.

I've picked up a few bits off ebay in China with an eye to trying to build a 'neat' harness that also incorporates a 4pin fan header (and just add a fan to the front or something), as well as a 5 -> 12V DC-DC step up board so that the unit functions as expected.

My test harness (which works with a regular ATX power supply) looks like this :

https://resources.bplondon.org/images/harness.jpg

The loose black lead is to touch against the case to fire up the ATX power supply, and then the power button on the front of the HP works as expected.

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So I got fed up with waiting for China EMS post and ordered a couple of bits from US sellers.

Assuming it doesn't break forum rules, I picked up a couple of these for the sum total of $4.38 each (http://www.ebay.com/itm/351357593689)

 

I joined the in/out -ve terminals and took them to one of the PSU ground wires, hooked the IN+ to the Vsb from ATX pin 9 and then fed the OUT+ to pin 6 of the PCI-express style connector.

As with all things, I figured it was best to test it before hooking it up to the HP Elite 8300 I'd purchased which turned out to be a good thing as the DC-DC step up was putting out 26V

https://resources.bplondon.org/images/hppsu/HarnessTest-1-26V.JPG

With the multimeter connected I used the adjustment screw on the top of the potentiometer until it was putting out 12V

https://resources.bplondon.org/images/hppsu/HarnessTest-2-12V.JPG

Once I was happy it wasn't going to explode the desktop, I plugged it all in

https://resources.bplondon.org/images/hppsu/First%20Test.JPG

I noticed this time that the LED on the motherboard lit as soon as power was applied to the ATX power supply, pressed the power button on the HP, and presto

https://resources.bplondon.org/images/hppsu/Success.JPG

 

I also picked up a couple of 4pin fan extension cables, so the next step will be to wire one of these into pins 1&2 on the P2 connector, along with a ground and a +12V from the ATX block to see if I can connect a regular 4pin fan.

 

If this works as I hope it will, the final step will be to get some breadboard fabbed up and build a single unit that has the ATX socket and then two connectors for the P1/P2 plugs (the P3 is just the standard ATX CPU 4pin)

 

Once I've had a little more time to make sure that this setup is stable, I'll post more detailed specs if you fancy having a go at it yourself.

 

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Hi,

 

Thanks for this. I have an Elite 8300 and would also wana switch to an ATX PSU. Is your system running stable? could you get some more details, like a wiring schema? that would help me to do this.

 

Is the DC-DC step up needed, if yes, what does it do?

 

Thanks.

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Great work. I just got an 8000 and I want to slap my gtx280 (236W max rating) on it.

 

At first I tought about dual psu setup.  removing the pcb from the hp power supply and replacing or trimming one heatsink and  fit it in a box that could occupy one 5.25 bay. the psu 4 pin fan would the be fitted on the chassis near or inside the new ATX PSU. Two L-shaped metal pieces would help securing the ATX psu to the chassis and a very small 12Vdc relay would power it up when it sensed power on any 12Vdc wire on the hp psu.  The airflow on the hp psu would be reduced but the strain would also be very low (powering just the mobo and cpu), I estimate <100w with my q9550. Everything else would be powered from the ATX psu.

 

Your approach is much cleaner.

HP Recommended

The 5 to 12 Vdc step-up is needed because ATX motherboards need 5Vdc, known as Vsb - Standby Voltage (supplied by the ATX psu even when pc is off). If Vsb is not present, yopu may power up the motherboard, but it will not POST.

 

Our hp motherboard requires a Vsb of 12Vdc instead of the standard ATX 5Vdc Vsb. That's why we need the step-up, to be able to power the pc from the front panel button.

 

I'm waiting for my step-up pcb to arrive. Then I'll install it inside my 600W ATX psu.  All that's left is now is figure out how to fool the hp motherboard into thinking that the 4 pin hp fan in the psu is connected and working.

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