Question Suggestions on RX 7900 XTX and R9 9950X3D custom loop

[AlexYovan]

The scheme:

The PC:
CPU-Z

MB - ASRock X870 Pro RS
CPU - 9950X3D
RAM - 64GB DDR5@6000-30-36-36-76
SSD - SN7100 2TB + Aorus Gen4 2TB
GPU - ASRock RX 7900 XTX Phantom Gaming
PSU - XPG Cybercore II 1300W
Chassis - Thermaltake Core P8
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The parts for the custom loop:
GPU WB:
Bykski RX 7900 XTX Taichi

CPU WB:
Bykski CPU-XPR-CU-M-V3 (copper body)

Radiators:
3x180mm Alphacool XT45 (45 mm, 12 fpi)
480mm Bykski RC-30 x2 (30 mm, 14/16 fpi)
420mm Bykski RC-28 (28 mm, 14/16 fpi)
120mm Corsair Hydro XR5 (30 mm, 16 fpi)

Fittings and Tube:
Bykski Soft Tube Fitting Kit, 16/10mm (soft tube 3m, fittings x8, 90° fittings x4, plug x2)
Hose Cutter x1
Alphacool HF 16/10mm, 90° x9
Bykski fitting (Male To Male) x3
Bykski Expansion 22-31 mm (Male to Male) x1
Bykski Ball Valve Kit (B) x1

Coolant:
Alphacool Ultra Pure Water 5000ml (x1)
Spray Bottle 500ml

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I already have the distro plate Corsair Hydro XD7 (with Xylem D5 Pump), which will be mounted on the backside of the chassis.

The fans:
180mm - SilverStone AP181 (x3 for the 3x180mm Alphacool XT45)
140mm - Arctic P14 Max (x3 for the 420mm Bykski RC-28)
120mm - Arctic P12 Pro (x4 for the 480mm Bykski RC-30)
120mm - Corsair RS120 Max (x4 for the 480mm Bykski RC-30)
120mm - XPG Nidec Vento Pro 120 (x1 for the 120mm Corsair Hydro XR5)

Probably all of the fans will be in a push configuration.

Also, the Sorandy LSJ-ZNRB flowmeter:


Thermaltake Core P8 will be heavily modded in order to accommodate the radiators and the Corsair Hydro XD7.
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The questions:

1. Do you think that Bykski RX 7900 XTX Taichi (A-AR7900XTX-X) is compatible with my RX 7900 XTX Phantom Gaming (RX7900XTX PG 24GO)?

As far as I can see, Taichi and Phantom Gaming use the same PCB, but I am still worried about compatibility issues.

2. How much coolant would I need? Is 5 liters enough?

3. Do you know if Bykski soft tubes are any good?

4. Do you think that I am missing something?

This will be my first custom water-cooling loop, so any advice or suggestions are welcome.

 

[Aeacus]

While open-loops aren't my forte, i can spot an issue or two and also answer something.

2. How much coolant would I need? Is 5 liters enough?

I don't see you linking your pump or reservoir specs. But based on the schematic, it looks to be pump and reservoir combo.

Hard to tell how much liquid you need but 5L is a lot.
Depending on the reservoir, i can't tell if it needs to be filled fully or you can leave pocket of air in there, to capture air bubbles from the loop.

4. Do you think that I am missing something?

You've marked the drain port. But where is the fill port? At reservoir? At the topmost of the rad? Since when filling the system, you have to keep the pump running to get air out of the loop. Else-ways, trapped air will worsen the cooling considerably.

Probably all of the fans will be in a push configuration.

I'd run the fans in pull conf.

Reason why here, at 3:45:

View: https://www.youtube.com/watch?v=UyC3lZ5WFMk#t=3m45s


Also, if you haven't look at JayzTwoCents videos before, i suggest you watch them. Jay is one of the best open-loop experts out there.
This tutorial is great to start things off with:

View: https://www.youtube.com/watch?app=desktop&v=5ZnDESqJdyU