Direct-to-Chip
KX-PLATE CX500
CPU Cold Plate, 500 W Class
A low-profile CPU plate for dense 1U nodes, rated to 500 W with a 0.021 K/W resistance.
- Rated capacity
- 0.5 kW
- Per rack
- 120 kW
- Nominal Delta-T
- 8 K
- Nominal flow
- 0.9 L/min
- Supply water
- W32 – W45 (32 – 45 °C)
- Max pressure
- 4.0 bar
- Partial PUE
- 1.08
- Working fluid
- PG25 or treated water
The CX500 exists because a rack full of accelerators still has host processors, and a 1U chassis has no vertical room to spare for them.
Height is the specification
At 15 mm the CX500 clears the constraints of a dense 1U node with the memory and the riser still in place. Getting there without giving up performance meant a finer channel geometry and a shorter, wider flow path rather than a taller fin stack.
Plumbed in series
A two-socket node normally runs both CX500 plates in series off one supply branch. At 0.18 bar apiece the pair fits comfortably inside the pressure budget a rack manifold has to work with, which keeps the node-level plumbing to a single inlet and a single return.
One service kit
The CX500 uses the same fitting standard as the GX1600. A technician carries one set of couplings, one torque spec and one leak-check procedure for the whole rack.
Technical data
Full specification
Values are at nominal duty. Ask us for the full performance map if you are working outside these conditions.
| Rated device power | 500 W |
|---|---|
| Thermal resistance | 0.021 K/W |
| Nominal flow rate | 0.9 L/min |
| Nominal Delta-T | 8 K |
| Supply water temperature | 32 – 45 °C |
| Pressure drop at nominal flow | 0.18 bar |
| Maximum working pressure | 4 bar |
| Stack height | 15 mm |
| Base material | C110 copper, nickel plated |
| Socket compatibility | LGA and SP-series carriers |
| Dimensions (L × W × H) | 78 × 78 × 15 mm |
| Mass | 310 g |
| Thermal cycle qualification | 5,000 cycles |
Module 05 — Flow envelope
Delta-T against required flow
This unit rejects 1 kW. Widening the temperature difference across the loop cuts the volume of water you have to move — and pump power falls with roughly the cube of flow.
- Required flow
- 0.90 L/min
- Return temperature
- 38.0 °C at W30 supply
- Relative pump power
- 100 % of nominal
Water at 4.18 kJ/kg·K, density taken as 1 kg/L. Pump power index scales with the cube of the flow ratio against this unit’s nominal 8.0 K design point.
Related
Others in this range
KX-PLATE GX1600
GPU Cold Plate, 1,600 W Class
A skived copper microchannel plate rated to 1,600 W per package at a thermal resistance of 0.015 K/W.
- Capacity
- 1.6 kW
- Per rack
- 160 kW
- Delta-T
- 8 K