ToneCooling T-HS202305 NVIDIA rtx 4090 gpu liquid cold plate dual slot, product view

NVIDIA RTX 4090 GPU Liquid Cold Plate – Dual-Slot | T-HS202305

Dual-slot copper cold plate for the RTX 4090, 29.7 mm total height. Deeper channel core holds 450 W below 55 °C at 35 °C inlet (20 K rise, ≈ 0.044 °C/W) at only 0.5 LPM — half the flow of the single-slot version — with 34% EGW and 8 kPa. Best choice for low-flow loops or when pump / CDU capacity is shared across many GPUs.

450 W at < 55 °C surface with 35 °C inlet — 20 K case-to-inlet rise on 34% EG / water (EGW)
8 kPa at 0.5 LPM — moderate pressure drop, sized for standard CDU branches
270 × 97 × 29.7 mm — 29.7 mm profile; port position to your chassis layout
TLP-bonded copper, 1 MPa rated — every unit leak-tested before shipment

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Download Datasheet (PDF)T-HS202305 · Rev. A · Sept 2026

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Engineering overview

Thermal: 20 K case-to-inlet rise at rated load, measured at the contact area with 34% EG / water (EGW). Thermal interface material and mounting pressure set the final junction temperature — we supply the recommended TIM and torque spec with each order.
Hydraulic: 8 kPa at 0.5 LPM — moderate pressure drop, sized for standard CDU branches; validated on our flow bench at the rated inlet temperature of 35 °C.
Mechanical: 270 × 97 × 29.7 mm copper plate, 29.7 mm overall height. Mounting pattern matches the target device; custom port orientation and fittings on request.
Construction: TLP – Transient Liquid-Phase Diffusion Bonding — a homogeneous metallurgical joint with no braze filler or flux residue in the coolant path; 1 MPa working pressure, 100% pressure-tested.
Fittings: G1/4 quick-disconnect, barb or custom per drawing; inlet/outlet position to your chassis layout.

T-HS202305 Specifications (as tested)

Parameter	Value
Model	T-HS202305
Target device	NVIDIA RTX 4090 GPU — Dual-Slot
Rated heat load	450 W
Coolant (as tested)	34% EG / water (EGW)
Inlet coolant temperature	35 °C
Max. plate surface temperature	< 55 °C
Case-to-inlet thermal resistance	≈ 0.044 °C/W (calculated from rated point)
Flow rate / pressure drop	0.5 LPM / 8 kPa
Working pressure rating	1 MPa
Dimensions (L × W × H)	270 × 97 × 29.7 mm
Base material	Copper
Bonding process	TLP – Transient Liquid-Phase Diffusion Bonding
Leak test	100% pressure-tested before shipment

Typical applications

AI inference and fine-tuning servers
Liquid-cooled workstations and render nodes
Low-flow loops where pump / CDU capacity is limited

Ordering & RFQ

How to order: quote model T-HS202305 with quantity and required fitting type. Samples 1–5 pcs with leak-test report; production quantities after drawing approval.

RFQ checklist: target device and heat load, quantity, coolant type, inlet temperature, target flow rate and available envelope. Send a STEP/PDF of your tray or assembly if port position matters.

FAQ

Can it run on warm water? The rated point is 35 °C inlet with 34% EG / water (EGW). Other inlet temperatures and coolants (pure water, EGW, PGW) are supported — performance is validated per coolant on request.

Can the ports or fittings be customised? Yes — fitting type, thread and inlet/outlet position are set per drawing without changing the qualified core.

What is included? Cold plate, mounting hardware, recommended TIM and torque spec, leak-test report. Datasheet PDF available above; STEP file on request.

NVIDIA and the GPU model names are trademarks of NVIDIA Corporation. Referenced for compatibility only; ToneCooling is an independent manufacturer.