Views: 0 Author: Site Editor Publish Time: 2026-11-10 Origin: Site
At CSTHEATEXCHANGER, we design and manufacture extreme-performance 480mm (Quad 4x120mm) and 420mm (Triple 3x140mm) High-Density Liquid Cooling Radiators engineered specifically for multi-GPU AI training servers, deep learning inference workstations, high-performance computing (HPC) nodes, and 4U/5U/Pedestal GPU supercomputer chassis (supporting NVIDIA H100, H200, RTX 6000 Ada, and AMD Instinct MI300 clusters) (thermal heat dissipation capacities engineered from 1,500 W to over 3,500 W per radiator module). Fabricated with 100% deoxidized pure copper flat fluid tubes (C12200), high-density multi-louvered pure copper cooling fins (14 to 20 FPI), and forged H65/H68 brass end chambers with multi-port G1/4" threaded connections, our 480mm/420mm radiators eliminate mixed-metal galvanic corrosion entirely. Available in Standard (30 mm), Heavy (45 mm), and Monster (60 mm) thickness profiles, CSTHEATEXCHANGER extreme-density radiators feature hardened steel screw protector shields, lead-free high-temperature silver brazing, and proof test pressures >0.50 MPa>0.50 MPa, delivering ultra-low thermal resistance and continuous sub-60∘C GPU core temperatures under 24/7 full-load AI compute.
Modern AI servers pack 4 to 8 high-power enterprise GPUs (generating 300W to 700W per GPU plus 350W CPU TDP) into compact 4U rackmount or tower workstation enclosures:
480mm & 420mm HIGH-DENSITY AI GPU RADIATOR THERMAL FLOW
================== 4U/5U AI SERVER / MULTI-GPU WORKSTATION ==================
[ Concentrated Heat Flux: 4x to 8x Enterprise GPUs (Total Thermal Load: 1.5 kW - 3.5 kW) ]
│
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┌────────────────────────────────────────────────────────────────────────────┐
│ FORGED BRASS (H65/H68) MULTI-PORT END TANKS (6x G1/4" THREADED PORTS) │
│ Low-resistance fluid header feeds dual-pass or multi-pass copper tube rows │
└───────────────────────────┬────────────────────────────────────────────────┘
│
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┌────────────────────────────────────────────────────────────────────────────┐
│ CSTHEATEXCHANGER® 480mm (4x120mm) / 420mm (3x140mm) FULL COPPER CORE │
│ • 14 to 16 High-Flow Deoxidized Copper Flat Channels (C12200, k ≈ 390 W/m·K)│
│ • Multi-Louvered Pure Copper Fins (14 - 20 FPI) Optimized for Push-Pull Fans│
│ • 100% Galvanic Corrosion Free (Pure Copper & Brass Fluid Loop) │
└───────────────────────────┬────────────────────────────────────────────────┘
│
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┌────────────────────────────────────────────────────────────────────────────┐
│ PUSH-PULL HIGH-STATIC PRESSURE SERVER FAN ARRAY │
│ ┌──────────────────────────────────────┐ ┌───────────────────────────────┐ │
│ │ [1] 480mm ARRAY (4 x 120 mm FANS) │ │ [2] 420mm ARRAY (3 x 140 mm) │ │
│ │ Extreme Length for 4U/5U Rackmount │ │ High Surface Area for Pedestal│ │
│ │ Dissipates up to 3,500W @ Push-Pull │ │ Massive CFM at low fan acoustic│ │
│ └──────────────────────────────────────┘ └───────────────────────────────┘ │
└────────────────────────────────────────────────────────────────────────────┘480mm Radiators (Length: ∼520 mm): Standard choice for 4U and 5U rackmount server chassis and horizontal front-to-back wind tunnels, mounting four 120mm high-static server blowers in push-pull configuration to dissipate up to 3,500 W.
420mm Radiators (Length: ∼465 mm): Optimized for 140mm fan platforms, providing 36% larger frontal face area than a 360mm radiator, delivering immense airflow volume at lower fan RPMs and reduced acoustic levels in desk-side AI developer workstations.
Our 45 mm and 60 mm thick radiators feature dual or triple parallel rows of micro-channel flat copper tubes. This configuration provides ultra-low hydraulic resistance (ΔP<15 kPaΔP<15 kPa), ensuring high coolant flow rates (>4.0 to 8.0 L/min) across multiple serial GPU water blocks without placing excessive load on D5/DDC pumps.
CSTHEATEXCHANGER builds AI server radiators with industrial-grade metallurgical reliability:
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CST 480mm/420mm FULL COPPER RADIATOR VS. GENERIC ALUMINUM RADIATORS
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Engineering Feature Generic Aluminum 480mm Radiator CST Full Copper 480mm/420mm Radiator
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Fluid Channel Metallurgy Aluminum Alloy (Prone to Pitting)Seamless Deoxidized Pure Copper (C12200)
Cooling Fin Metallurgy Stamped Plain Aluminum Foil High-Density Multi-Louvered Pure Copper
End Tank Metallurgy & Ports Plastic / Aluminum Tanks Forged Heavy-Duty Brass (H65/H68)
Galvanic Corrosion in Cu Loops Extreme (Requires Heavy Inhibitor)Zero Galvanic Risk (100% Copper/Brass Loop)
Thermal Heat Conduction (k) 205 W/m·K (Baseline) 390 W/m·K (Almost 2x Higher Conduction)
Screw Puncture Protection None (Screws Puncture Tubes) Integrated Hardened Steel Screw Shields
Multi-Port Configuration 2 Ports Only Multi-Port (4, 5, or 6 G1/4" Threaded Ports)
Operating Burst Pressure Limit 0.15 - 0.20 MPa > 0.50 to 0.70+ MPa (High Burst Safety)
Internal Cleanliness Standard Oily Flux & Brazing Residues Triple Acid Pickling & Ultrasonic Deionized Flush
================================================================================ CST 480mm / 420mm HEAVY COPPER MATRIX & SCREW GUARD PROFILE
PUSH-PULL HIGH-STATIC 120mm / 140mm SERVER FAN MOUNTING
┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐
│ ═════════════════════════════════════════════════════════ │ <-- Hardened Steel Screw Guard Plate
│ (Prevents M3/UNC 6-32 Fan Screws from Puncturing Tubes) │
├───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┤
│ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ <-- High-Density Multi-Louvered
│ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ █ │ Pure Copper Fins (16 - 18 FPI)
├───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┤
│ ═════════════════════════════════════════════════════════ │ <-- Dual / Triple Row Flat Pure
│ LIQUID COOLANT CHANNEL (C12200) │ Copper Fluid Channels (14 - 16 Tubes)
└───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┘
HIGH-TEMPERATURE LEAD-FREE BRAZING WITHSTANDS 24/7 THERMAL CYCLINGServer liquid loops operate 24/7/365 for years. Combining aluminum radiators with copper cold plates creates rapid galvanic corrosion that clogs microscopic 0.1 mm cold plate channels. CSTHEATEXCHANGER full copper/brass construction guarantees 100% chemical stability and zero galvanic sludge formation.
Our end chambers are hot-forged from solid H65/H68 brass and CNC-tapped with standard G1/4" BSPP parallel threads. Multi-port layouts (inlets/outlets on front, top, side, and bottom plus dedicated air bleed ports) allow direct multi-directional tubing routing in crowded AI server chassis.
CSTHEATEXCHANGER 480mm & 420mm RADIATOR THICKNESS MATRIX
[1. 30mm STANDARD PROFILE 480mm / 420mm RADIATORS]
• 480mm: 518 x 124 x 30 mm | 420mm: 462 x 144 x 30 mm | Fin Density: 18 - 20 FPI
• Optimized for medium-RPM fans (1,200 - 1,800 RPM) in compact 4U chassis.
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[2. 45mm HEAVY-DUTY HIGH-PERFORMANCE RADIATORS]
• 480mm: 520 x 125 x 45 mm | 420mm: 465 x 145 x 45 mm | Fin Density: 16 - 18 FPI
• Dual-row copper core; standard gold standard for 4-GPU AI training workstations.
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[3. 60mm MONSTER MULTI-GPU & HPC RADIATORS]
• 480mm: 522 x 125 x 60 mm | 420mm: 468 x 146 x 60 mm | Fin Density: 14 - 16 FPI
• Triple-row copper channel matrix; dissipates up to 3,500W in push-pull server configurations.(Note: The following engineering parameters represent standard manufacturing design envelopes. Dimensions, port quantities, fin densities, and exterior paint finishes are customized to AI server OEM client specifications.)
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CSTHEATEXCHANGER 480mm & 420mm AI GPU RADIATOR SPECIFICATIONS
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Engineering Parameter 480mm Series (Quad 120mm) 420mm Series (Triple 140mm)
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Nominal Radiator Form Factor 480 mm (Accommodates 4x120mm) 420 mm (Accommodates 3x140mm)
Overall Dimensions (L x W x H) 518 - 522 x 124 - 125 x 30/45/60mm 462 - 468 x 144 - 146 x 30/45/60mm
Thermal Dissipation Capacity 1,500 W (30mm) to 3,500+ W (60mm)1,200 W (30mm) to 3,000+ W (60mm)
Fluid Channel Metallurgy Seamless Deoxidized Pure Copper (C12200 / Cu-DHP, 99.9% Cu)
Cooling Fin Metallurgy High-Purity Pure Copper Foil (C11000 / Cu-ETP)
Fin Density / Profile 14 to 20 FPI (Fins Per Inch) Multi-Louvered High-Turbulence Profile
End Chamber / Tank Metallurgy Hot-Forged Heavy Brass Alloy (H65 / H68 / CuZn35)
Port Thread Specification Standard G1/4" BSPP Parallel Threads (2, 4, 5, or 6 Port Formats)
Fan Mounting Thread Standards Standard Metric M3 or UNC 6-32 Threaded Holes on Both Sides
Screw Puncture Protection Integrated Hardened Steel Screw Deflector Plates Beneath Holes
Side Frame Casing Metallurgy Heavy-Gauge Stainless Steel (AISI 304) or Matte Powder-Coated Steel
Brazing & Joining Metallurgy High-Temperature Lead-Free Tin-Copper / Silver Solder (RoHS Compliant)
Operating & Burst Pressures Operating Pressure: 0.15 - 0.25 MPa | Burst Pressure: > 0.50 MPa
Internal Cleanliness Standard Triple Acid Pickling & Ultrasonic Deionized Water Cleaned (< 5 mg/m²)
Surface Exterior Finishes Matte Black Industrial Finish, Snow White, Raw Copper, Nickel Plated
Quality & Environmental Codes RoHS Compliant, REACH, CE, ISO 9001:2015 Certified
================================================================================Yes. A 60mm thick 480mm full copper radiator paired with high-static pressure 120mm fans in a push-pull configuration (8 fans total) can dissipate between 2,800 W and 3,500 W of thermal load, maintaining liquid coolant delta-T below 10∘C10∘C over ambient and keeping all four GPU silicon cores below +60∘C+60∘C under sustained FP8 compute.
A 420mm radiator utilizes three 140mm fans, providing nearly identical surface area to a 480mm unit while being approximately 55 mm shorter in length. Furthermore, 140mm fans move equivalent CFM airflow at lower RPMs than 120mm fans, resulting in 4 to 6 dBA quieter acoustic operation in open office environments.
Generic radiators often contain acidic flux residues that leach into coolants and cloud acrylic reservoirs. CSTHEATEXCHANGER applies a strict triple-stage chemical pickling, ultrasonic degreasing, and deionized water flush cycle, ensuring internal cleanliness levels below 5 mg/m2 so coolants remain crystal-clear.
Achieve extreme multi-GPU thermal dissipation, eliminate galvanic corrosion, and ensure leak-free liquid cooling performance with CSTHEATEXCHANGER:
Custom Full Copper & Brass 480mm & 420mm Radiators (30mm, 45mm, 60mm Thicknesses)
100% Pure Copper Flat Tubes (C12200) & High-Density Louvered Copper Fins (14–20 FPI)
Forged Brass End Tanks with Multi-Port G1/4" Threaded Ports (Front, Side & Top)
Integrated Hardened Steel Screw Protector Plates (Zero Accidental Puncture Risk)
Triple Ultrasonic Deionized Cleaned Internals (Safe for PG25 & Dielectric Coolants)
Full OEM/ODM Branding, Custom Dimensions & Direct Global Factory Supply
Contact our specialized AI server liquid cooling engineering team today with your server chassis dimensions, GPU TDP thermal load (WW), fan static pressure curves, and port specifications for custom engineering drawings and factory-direct quotations.
Website: https://www.cstheatexchanger.com/
Technical Inquiries: info@cstheatexchanger.com
