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

[sandyware]

Wow!

Stupid question: I care barely cool a Ryzen 7700 non-X (65W TDP) with the same cooler, but you use a 7800x3d (120W TDP). Makes me wonder if there's something fundamental in setting up things that I'm missing or doing wrong.

In the recent build, I tested the temperature of 7700 using the AXP90-X36 cooler. With the power limit unlocked, running the AIDA64 FPU test is 90 degrees at 110W power, with a frequency of 4.7GHz and a room temperature of 25 degrees. Cinebench R23 10min test got 18600 pts. I think it's very sufficient for non extreme loads.

 

[Jokesterr]

@sandyware is the GPU only getting power from the riser?

Or is there some 8-pin magic going on behind the scenes?

 

[nightshift]

I have a question - maybe it was explained and I just blinded it, but how do you connect that riser to the x600 mobo?

 

[BaK]

@sandyware is the GPU only getting power from the riser?

I think you must be referring to that picture:

Since the M.2 slot can only provide around 7W, the yellow and black wires we see above are certainly helping in raising the power to match the 75W of a regular PCIe slot.

But 75W is not is not enough for an RTX 4060Ti.

The latter is then also getting power from the MeanWell PSU directly, that should be the black wires we see on the bottom right of the picture.
Connecting the PSU to the GPU could lead to the 'always on' problem, but this is not the case with this specific hardware as mentioned earlier in this thread.

 

[BaK]

I have a question - maybe it was explained and I just blinded it, but how do you connect that riser to the x600 mobo?

The riser is actually an ADT R43UF 4.0 M.2 to PCIe adapter, attached to the M.2 port on the back of the X600 board.

 

[nightshift]

The riser is actually an ADT R43UF 4.0 M.2 to PCIe adapter, attached to the M.2 port on the back of the X600 board.

Thanks. Didn't know these have an M.2 slot in the back as well. To be honest, there's a 4060 from Manli, that's little less than 150mm in length, so it can fit behind these small mobos with ease and could make something like a Velka 2. It would leave more space for the psu.

 

[sandyware]

@sandyware is the GPU only getting power from the riser?

Or is there some 8-pin magic going on behind the scenes?

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

 

[sandyware]

I think you must be referring to that picture:

Since the M.2 slot can only provide around 7W, the yellow and black wires we see above are certainly helping in raising the power to match the 75W of a regular PCIe slot.

But 75W is not is not enough for an RTX 4060Ti.

The latter is then also getting power from the MeanWell PSU directly, that should be the black wires we see on the bottom right of the picture.
Connecting the PSU to the GPU could lead to the 'always on' problem, but this is not the case with this specific hardware as mentioned earlier in this thread.

Perfectly right.

 

[ondert]

I couldn’t believe when I saw it says “internal psu” in the title

 

[bn-l]

I love what you've done here.

Do you think there's any chance the 7950x could work (with power tweaking) with a bigger cooler (axp-100cu with a 25mm fan) in a custom case?

 

[hrh_ginsterbusch]

I love what you've done here.

Do you think there's any chance the 7950x could work (with power tweaking) with a bigger cooler (axp-100cu with a 25mm fan) in a custom case?

With a 25 mm fan you could just skip out the axp-100 and use an axp120-x67 instead. Much more headroom (because bigger heatsink), and combined with an Air Slimmer 120, this thing rocks!

cu, w0lf.

 

[bn-l]

With a 25 mm fan you could just skip out the axp-100 and use an axp120-x67 instead. Much more headroom (because bigger heatsink), and combined with an Air Slimmer 120, this thing rocks!

cu, w0lf.

*I meant a 15 mm fan. Or maybe my is-60 v2 with its noctua 15 mm fan (which is hugely overpowered for my current 65w cpu)

 

[hrh_ginsterbusch]

*I meant a 15 mm fan. Or maybe my is-60 v2 with its noctua 15 mm fan (which is hugely overpowered for my current 65w cpu)

IF you use a 7950X, IT IS NOT.

You may read up how well the 7950X performs with the AXP120-X67 + Air Slimmer 120 soon, over at my build thread. Probably this week.

Until then, DalrayMyo has done some interesting tests with various overpowered CPUs (7950X, 14700k) and tiny heatsinks:

66 mm LP CPU cooler + i7-14700k:


100 mm LP CPU cooler + Ryzen 9 7950X:


53 mm LP CPU Cooloer + 7950X:


Deep-dive into various fan sizes + 53 mm LP CPU Cooler + 7950X:


cu, w0lf.

 

[msystems]

Incredible build. Can you explain in a little more detail how placing the resistor there allows you to use 12v input?

 

[sandyware]

I love what you've done here.

Do you think there's any chance the 7950x could work (with power tweaking) with a bigger cooler (axp-100cu with a 25mm fan) in a custom case?

Of course, the motherboard VRM can provide approximately 120W CPU power, and the 7950X does not need to replace the cooler at this power consumption. All core performance can be retained by 85%.

 

[sandyware]

Incredible build. Can you explain in a little more detail how placing the resistor there allows you to use 12v input?

All DC-DC circuits on the motherboard can work at 12V. All I did was lower the threshold for under-voltage protection of DC input.

 

[squirrel_slayer]

@sandyware Are you aware of any spots on the motherboard one could pillage 12v power from? I'll likely end up going the same PSU route you took, but it would be nice to be able to power this Tesla P4 I have in mine internally of the board.