There's no real control, it's just a pump fan header. It would all depends on the current draw of the pump. For me, I would use an external controller fed from a spare SATA power connector rather than taking a risk damaging the motherboard header.

The 4-pin pump power connector on the Arctic Freezer should work fine on the Aurora R10. Keep in mind that your motherboard uses Intel spacing and Intel mounting bracket. You do not need to install the motherboard backplate.

I think this would be asking for Diagnostic Startup problems because with nothing connected to PUMP_FAN header an air cooled CPU would be detected and a CPU fan connection would be required.

Likely. You might still run into that if it does not like the pump. It's one of the joy's of owning one of these machines; you get to fiddle around a lot to get something aftermarket to work.

does anyone know if the aio fan connector would deliver enought amps for a 3x PWM splitter?

@ProfessorW00d

"The 4-pin pump power connector on the Arctic Freezer should work fine on the Aurora R10. Keep in mind that your motherboard uses Intel spacing and Intel mounting bracket. You do not need to install the motherboard backplate."

-afaik the LFII comes with offset spacers for both intel and amd, since the mounting holes in the mobo are for intel i will probably run into trouble with the offset spacers? Afaik they are essential for optimal cooling and need to be ajusted for amd or intel specifically?

so many questionmarks in this endeavour and even if the makeshift aio with  externally mounted radiator would work, i can not be sure that i can do a GPU upgrade in the future because the graphics cards are getting bigger and bigger and the R10 can allready only fit almost no currect aftermarket GPUs...

i better sell this pos asap and write-off the losses....

Just take your time with the AIO mounting . . . should be no problems. Post photos if you have questions.

If you are going to upgrade to an external radiator it should not be an AIO. Or you could use the Arctic II for your CPU and an external rad for your graphics card. If you are going to liquid cool your graphics card, many more options will open because the PCB is usually much smaller than the giant fans/shroud/fin array/heat pipes necessary for air cooling . . . especially the Founders Edition graphics cards. A water-blocked RTX 3090 Founders Edition is only about 220mm long.

should be fine . . . fans draw less than 0.20 amps

The LFII has 45cm tubes, i checked the measurements and it would be possible to route tubes through the backside i/o if you get creative with drill and metal cutter... 

This would be a budget solution since the LFII is an affordable aio but i scrapped the plan now anyway.

Anything custom loop water cooling, including water colled GPUs are very expensive and basically money sinks for this case... i just want to get rid of this computer now, i hope i will find a buyer who doesnt mind all the problems with the R10...