Dimensional Specifications of the Frozen Prism 240 Frame
The Thermalright Frozen Prism 240 Black ARGB is a high-performance, budget-friendly liquid cooler popular in Small Form Factor (SFF) Mini-ITX builds. The radiator frame measures 277mm in total length, 120mm in width, and 27mm in core depth. When paired with standard 25mm 120mm PWM fans, the cooling stack thickness totals 52mm. While a 277mm radiator length is standard for 240mm units, the specific end-cap reservoir dimensions and square frame geometry create tight clearance tolerances inside sub-20L Mini-ITX cases like the Cooler Master NR200P or SSUPD Meshlicious.
SFX Power Supply Cage Height & Positioning Conflicts
In compact SFF chassis, 240mm radiators are typically mounted to the top panel or a hinged side bracket directly adjacent to the internal SFX power supply cage. The placement of an SFX PSU (such as a Corsair SF750 SFF cable length unit) heavily influences radiator clearance:
1. High SFX Bracket Position (SFX Mode)
When the SFX PSU cage is mounted in the highest factory position to maximize clearance for long GPUs below, the top edge of the PSU cage sits just 10mm to 15mm below the chassis top frame. Installing the 277mm Frozen Prism radiator frame above causes the front end-cap of the radiator to physically collide with the top flange of the SFX PSU cage or modular PSU cable connectors exiting the top of the power supply.
2. Low SFX Bracket Position Adjustment
To resolve top radiator collision, builders must drop the SFX PSU cage to its lower mounting holes (Position 2). This creates ~35mm of vertical clearance between the top of the PSU and the chassis ceiling, allowing the 52mm radiator/fan stack to seat cleanly. However, dropping the PSU cage reduces available clearance above the graphics card, restricting vertical GPU pass-through space in cases evaluated under Fractal Terra Mini-ITX GPU clearance testing.
SFF Clearance Matrix: Radiator Frame vs PSU Cage
| SFX PSU Cage Mounting Position | Top Radiator Stack Clearance | Max GPU Thickness Supported Below |
|---|---|---|
| High Position (SFX Mode) | 14 mm (Hard Collision with 277mm frame) | 3.5-Slot GPUs (75 mm) |
| Low Position (Position 2) | 38 mm (Clears 52mm stack easily) | 2.5-Slot GPUs (55 mm) |
| Front SFX Mount (NR200 Mod) | Over 60 mm (Full Clearance) | Limited to 240mm max GPU length |
Mini-ITX Motherboard Daughtercard & VRM Considerations
Beyond PSU cage placement, the Frozen Prism’s pump block (measuring 67mm x 67mm x 58mm) must clear dense Mini-ITX motherboard layouts. As seen in ASUS ROG Strix B650I Lightning AIO pump VRM daughterboard clearance evaluations, vertical M.2 audio riser daughtercards and tall VRM heatsinks frame the CPU socket tightly.
Builders pairing this AIO with top-tier gaming CPUs like an AMD Ryzen 7 7800X3D AM5 motherboard setup should route the pump block rotary fittings facing either the front panel or bottom PCIe slot to ensure smooth tube sweeps inside restricted SFF enclosures.
Tubing Flexibility & Radius Management
The Frozen Prism utilizes 400mm rubber tubes wrapped in high-density nylon braiding. In sub-15L cases, 400mm can actually be slightly long, requiring tubes to be coiled gently in a loose “S-curve” around the SFX power supply cage. Never kink or zip-tie the tubes with excessive force against the PSU cage edge, as this restricts fluid velocity and increases pump noise.
Veteran Builder Installation Checklist & Diagnostic Protocol
Fitting the Thermalright Frozen Prism 240 into cramped SFF enclosures demands strict sequence execution:
- Set SFX PSU Cage to Position 2: Drop the internal SFX PSU cage to its lower mounting position (Position 2) before installing the top radiator frame. This provides 38mm of clearance above the PSU for the 52mm radiator/fan stack.
- Pre-Route Modular PSU Cables: Connect all modular cables (24-pin ATX, EPS 8-pin, 12VHPWR) to the SFX power supply BEFORE mounting the 240mm radiator. Plugging in cables after radiator installation is nearly impossible in sub-15L cases.
- Verify RAM Lightbar Height: Confirm memory height is under 40mm. If using tall RAM, select slim 15mm 120mm fans for the radiator to gain 10mm of extra headroom above the memory slots.
- Test Side Panel Latch Fit: Once assembled, snap the SFF chassis side panels into place. Verify that AIO tubes do not bulge outward against side mesh panels.