HP Pavilion 690 (690-0028 / 3LC24AA) Power Supply Upgrade

[narmstrong79]

Has anyone successfully upgraded the  standard 310W PSU on the 690 to  something 500W or higher ?

The connectors on the PSU  and sunflower motherboard look to be  proprietary.   Are there adapters available  or wire diagrams if i wanted to cut the wires and adapt to an aftermarket PSU ?

I bought an upgraded video card  but it requires a 550+W PSU. 

the HP one is stupidly overpriced. L05757-800 

[wb2001]

@narmstrong79,

There is no known adapter that hacks those motherboards to accept an ATX PSU.

[narmstrong79]

I'm no PC guy but isn't the connection only used to send volts and amps to the motherboard? 

Theoretically couldn't I just measure the voltage of each wire and splice those together with the corresponding voltage from another power supply and reuse the adapter?  

[wb2001]

@narmstrong79 

Not really. There is a "power-on" signal voltage.

You have a variation with the 690-0028b Sunflower motherboard found here

There is a 500W PSU that has the correct plugs, an HP L05757-800.

No one has ever reported using it with the Sunflower.

Here is what I created without support from the community.  If anyone took my cross-reference and tried it,  it was never reported back. That would have helped.   Just "CLICK" on it.

[narmstrong79]

I've changed the stock  RX550 GPU to ”XFX Radeon RX 570 DirectX 12 RX-570P8DFD6 8GB 256-Bit DDR5 PCI Express 3.0 CrossFireX Support Video Card"    without changing the PSU.   It came with an 8 to 2x 6 pin adapter.  I am using the    Extra 6-pin from the power supply and a sata (15 pin) to 6 pin adapters to power the card.    So far so good,  The PSU recommends  500W PSU… so I am a little concerned

I've also upgraded from 8GB Ram to 2 new 8GB sticks (16GB)   and the PC can handle me using it for Oculus quest (via link USB) and all is running pretty well. 

[Hibb1]

Does any of this help?

https://h30434.www3.hp.com/t5/Desktop-Hardware-and-Upgrade-Questions/upgrading-power-supply-in-a-690...

[wb2001]

@narmstrong79 

The comparison of the wattage with the RX550 vs the RX570 is shown here.  The XFX Radeon RX570 shows an 8 pin power plug.  A 100W different is noted. What are the exact cables from your existing 310W supply. Please list the individual cables, to include  that extra 6 pin from the PSU?

[narmstrong79]

There was an extra 6-Pin not being used from the power supply. This was for expanding the system  as the rx550 stock was powered from the PCIE slot.

The xfx came with a 8-pin male to 2x 6-pin female. I connected that direct to the card.  

 

I also had a 15-pin sata to 6+2 pin adapter.

I took the extra from the power supply and 6 pins coming off the sata adapter to the 2 6-pin on the card adapter

Extra 6-pin

 

Sata (P14)6+2

 

[wb2001]

@narmstrong79,

Thanks for the reply.

Which PSU, there are 2 model # listed here.    Which one has the added cable? 

Maybe I did not make it clear. How many cables are on the PSU, and what are their individual make-ups.

I always assumed the TWO 2x2 motherboards and the inline 7 pin were standard.

You said you found a spare 6 pin plug (MALE) unused from the PSU. Can you verify it was a PCIEx16 power plug.

You are the first person to report such a cable.

As you said :

1) " 8-pin male to 2x 6-pin female. I connected that direct to the card".  You say that left you TWO - 6 pin females (Y connect).

2)  The 15-pin sata to 6+2 pin adapter, so it was MALE.  You used 6 pins of the Y connect.  Correct?

3)  The unused 6 pin MALE from the PSU was used with the remaining 6 pin female.  😊  😃

Please reply to this inquiry.

BTW<> stock Sunflower boards have  180W PSU (590-p0044 as example). Add a 50W need from the PCIE slot and the Sunflower gets a 310W PSU. 🤔

[narmstrong79]

I have the 310w PSU as seen he

the "extra" 6-pin that I found was labeled "P4"

Yes the card came with an 8-pin male to  a Y dual 6-pin.. so one 6 pin from the PSU and one 6-pin data adapter