KB 019256 - Key Planning Steps Before Building a Custom Loop Workstation
When making a custom liquid-cooling loop workstation, you need to carefully plan for things like heat load, case layout, component compatibility, and long-term maintenance. Based on advice from experts and real-life experience as a builder, here is a clear, organized checklist.
Key Planning Steps
1. Define Your Hardware & Heat Load
Understanding your components determines radiator size, pump
strength, and loop complexity.
- CPU model & expected power draw
- GPU(s) TDP (especially if using multiple GPUs)
- Overclocking plans
- Total heat output → helps size radiators (e.g., 450–500W for
CPU+GPU setups)
Workstation CPUs (Threadripper, Xeon, EPYC) and pro
GPUs (RTX A5000, 4090, etc.) generate significant heat: plan for radiators
accordingly.
2. Choose the Right Case
Your case determines radiator support, pump/reservoir
placement, and tube routing.
Look for:
- Space for multiple radiators (360mm or 420mm recommended)
- Pump/reservoir mounting options
- Good airflow and dust filtration
- Cable & tube management space
- Case selection is one of the biggest factors in loop
planning.
Case and other peripheral considerations for different configurations
3. Select Cooling Components
| Component | What to Consider |
| Radiators | Thickness, fin density, number of units |
| Pump | D5 vs DDC depending on loop restriction |
| Reservoir | Combo units save space |
| Water Blocks | CPU block, GPU block, VRM block (optional) |
| Tubing | Soft vs hard tubing |
| Fittings | Compression, angled, rotary |
| Coolant | Clear vs. colored maintenance intervals |
- D5 is best for most loops: high flow, quiet, cool-running, and long lifespan.
- DDC is best for very restrictive loops: higher pressure, compact size, but it runs hotter and louder.
4. Plan Loop Order & Routing
While loop order is flexible, the reservoir pump must always
be direct.
Plan:
- Clean tube runs
- Minimal sharp bends
- Accessibility for draining and filling
- Aesthetics vs practicality (both matter)
5. Radiator Capacity Planning
General guideline:
- At least 240–360mm radiator per major component (CPU or GPU)
- More radiators = quieter fans and lower temps
- Dual 360mm radiators or thick 420mm radiator
- Push/pull fan setups (optional)
6. Maintenance Expectations
Custom loops require:
- Coolant replacement every 6–12 months
- Dust cleaning
- Occasional draining & flushing
- Monitoring for pump noise or flow issues
This is more work than AIOs but offers better thermals and
silence.
7. Aesthetic Planning (Optional)
- Tube material (acrylic, PETG, soft)
- RGB lighting
- Coolant color
- Clean symmetry in layout
8. Compatibility Checks
Before buying anything, confirm:
- GPU block compatibility with your exact model
- Motherboard clearance for fittings
- Radiator thickness vs case space
- Pump/reservoir mounting options
9. Sketch or Mock‑Up Your Loop
Many builders:
- Draw the loop on paper
- Use online configurators
- Dry‑fit components before cutting tubing
This avoids costly mistakes.
DRAW.IO for the loop configuration