Log BAOCASE Mini | 2.77L 7800X3D & 4060Ti & internal PSU(with X600-STX 12v input MOD)

[sandyware]

Hello, I've recently received the sister motherboard to this board, the X600TM-ITX. I'd like to do the 12V mod as well, but there is no tutorial for that anywhere. With some light inspection, it seems my motherboard uses the same power circuit as this, the STX. However, the position of the components on the TM-ITX are a little different:

I have a multimeter but no schematic. Can you tell me what the new 100K Ohm resisters are connecting to in relation to the PU23 chip? I can then trace out the connections and make the proper mod on my end.

I have no idea, the difference between the two board is very significant.

 

[xsliquid]

Hi @sandyware

Seeing if you had this problem with any of your builds, I did a resistor mod with a SMD 100K resistor in 0402. Running x600 board with the HDPLEX 250W and the 12v going to the barrel plug.

The system was running completely fine for a couple of days. Then the following day without any modifications, the system would shut off after about 2 minutes of usage. Then after getting it back on by unplugging power it would run about 5 seconds and then shut off again.

I tried two different HDPlex 250w GAN and both are unable to keep the system powered on long term.

System has a 9700X CPU and I did get it working with a RTX 4060 low profile with the GAN Also powering the video card. But after it started shutting down, I removed the video card so it is only running on the 9700X on board video and it still shuts off.

Is it possible the resistor mod isn't able to keep the system running stable with the 12v from the GAN?

Thanks for any input.

 

[xsliquid]

The longer I keep the system without power, on the next boot up the system is able to stay on for a few minutes more...

 

[SFFMunkee]

The longer I keep the system without power, on the next boot up the system is able to stay on for a few minutes more...

Do you have any other power supplies you can test? I.e. not an HDPlex

It would at least rule that part out!

What’s your PBO settings set to? I wonder if the 9700X trying to pull more than 65-90W and some sort of OCP is kicking in..?

 

[xsliquid]

I guess I could try with a regular ATX. I don't have any other pico psu/meanwell

I set the bios to default several times. So I would assume PBO is off.

Also seems to be the time duration when it is on that causes it to shut down. As it has powered off when I was in bios and most the time in windows it's pretty much idling. Also did a 3 min prime95 test. It didn't power off until a few seconds after I stopped the test.

 

[SFFMunkee]

I guess I could try with a regular ATX. I don't have any other pico psu/meanwell

I set the bios to default several times. So I would assume PBO is off.

Also seems to be the time duration when it is on that causes it to shut down. As it has powered off when I was in bios and most the time in windows it's pretty much idling. Also did a 3 min prime95 test. It didn't power off until a few seconds after I stopped the test.

That actually sounds like CPU voltage issues, like what happens when you have Curve Optimiser too aggressive. i.e. It works fine under load but then crashes when at or near idle.

Maybe try setting a POSITIVE curve optimiser or a positive offset CPU voltage maybe? I can't remember what options there are in UEFI/BIOS.
Or even try forcing ECO mode or negative boost offset.

Otherwise yeah I'd see if you can jury-rig something to power from an ATX supply if you can.

 

[nmogv2]

There is an 8-pin power supply of 2 16AWG-wires.

Could you show how you wired up the 8 pin to the 12v on the power supply? Did you just split 2 16gauge wires to the 3x12v portions of the PCIe 8 pin plug? And is there a single ground...etc.

 

[sandyware]

Could you show how you wired up the 8 pin to the 12v on the power supply? Did you just split 2 16gauge wires to the 3x12v portions of the PCIe 8 pin plug? And is there a single ground...etc.

3x12V pin ,and 5x GND pin, each soldered to the same wire

 

[sandyware]

Hi @sandyware

Seeing if you had this problem with any of your builds, I did a resistor mod with a SMD 100K resistor in 0402. Running x600 board with the HDPLEX 250W and the 12v going to the barrel plug.

The system was running completely fine for a couple of days. Then the following day without any modifications, the system would shut off after about 2 minutes of usage. Then after getting it back on by unplugging power it would run about 5 seconds and then shut off again.

I tried two different HDPlex 250w GAN and both are unable to keep the system powered on long term.

System has a 9700X CPU and I did get it working with a RTX 4060 low profile with the GAN Also powering the video card. But after it started shutting down, I removed the video card so it is only running on the 9700X on board video and it still shuts off.

Is it possible the resistor mod isn't able to keep the system running stable with the 12v from the GAN?

Thanks for any input.

Does the USB port still have 5V output after automatic shutdown?

 

[xsliquid]

I didn't check. Unable to check anymore because it seems to have suddenly fixed itself.

Made two changes to the BIOS:
- PCIe Gen changed from Auto to Gen 4
- Fan speed from low noise to medium

I thought to change the PCIe gen because when I was first set up the system I was using an older Gen3 cable that didn't work at all. So I switched to Gen3 speed, but that riser still didn't work, but I had no shut down issues when using the onboard graphics.

Weird if that's the setting that fixed it... So really unsure.

Now it works fine... But it feels like there may be some slight video stuttering from using a riser cable. Don't know if I'm imagining or not.

Thanks @sandyware

 

[SFFMunkee]

I didn't check. Unable to check anymore because it seems to have suddenly fixed itself.

Made two changes to the BIOS:
- PCIe Gen changed from Auto to Gen 4
- Fan speed from low noise to medium

I thought to change the PCIe gen because when I was first set up the system I was using an older Gen3 cable that didn't work at all. So I switched to Gen3 speed, but that riser still didn't work, but I had no shut down issues when using the onboard graphics.

Weird if that's the setting that fixed it... So really unsure.

Now it works fine... But it feels like there may be some slight video stuttering from using a riser cable. Don't know if I'm imagining or not.

Thanks @sandyware

Definitely strange as neither of those settings make any sense to changing it! But hey, if it's working it's working!

 

[nmogv2]

An additional question:
Where are you stealing 3.3 and 5v for the black and yellow cables for the riser card? Or is the conversion handled on the riser, and you're just splitting a 12v and ground wire to the riser card input. In which case, any specifics on how which wire you chose to split from?

 

[sandyware]

An additional question:
Where are you stealing 3.3 and 5v for the black and yellow cables for the riser card? Or is the conversion handled on the riser, and you're just splitting a 12v and ground wire to the riser card input. In which case, any specifics on how which wire you chose to split from?

3.3V is provided by the M.2 slot on the motherboard and directly connected by the riser cable. Riser only requires an external 12V connection, connect it to the PSU.