All stock codes associated to this product
STMCR420XP, ST-MCR420-XP
MCRx20-XP "eXtreme Performance" Radiator Series
Part Number: MCR420-XP
Size: Quad 120mm
Introduction
The MCRx20-XP (eXtreme Performance) series radiators are high-performance liquid-to-air heat exchangers optimized for use with medium speed 120mm fans and specifically engineered in a slim for factor for high-end liquid cooled Personal Computers.
The XP series derive from the Quiet Power technology (QP series) first introduced in 2005 and both series share the exact same dimensions. They differentiate themselves by a higher fin-per-inch (FPI) count where the QP series feature a 12 FPI specification versus 20 FPI for the new XP series. A higher FPI count means that the XP series are more efficient at dissipating heat in the higher RPM fan ranges. When large heat loads are involved for example a CPU and GPU(s) in the loop, this may translate into improved coolant temperature.
In general, we recommend selecting a radiator in the XP series for applications where fans will run from 1200 RPM and above, and selecting among the QP series where fans will run from 1200 RPM and below. A more refined analysis including various coolant flow rate scenarios is reported in the performance section.
The XP series are available in 4 sizes: 1x120mm, 2x120mm, 3x120mm, and 4x120mm.
Features & Benefits
| Features |
Benefits |
| Thermal designis optimized for maximum heat dissipation with 120mm fans featuring medium air output (1000 to 1800 rpm) |
High performancecoolingat moderate noise levels. |
| Slim form factor (34mm) |
Reduces radiatorintrusion on neighboring components, helps compatibility |
| Self-purging plenums |
Help eliminate accumulation of air in the radiator, and ennoying gurgling noises |
| Industry standard fan spacing (15mm) |
15mm fan spacing is adopted as a standard by most case manufacturers |
| Brass tubes |
No corrosion |
| Copper fins |
Better heat dissipation |
| 1/4" BSPP (G1/4) threaded hubs with flat face |
Compatible with industry standardG1/4 fittings with captive o-ring |
| Quality assurance: all our radiators are ultrasonically cleaned to remove solder flux, and individually pressure-tested for leaks! |
Performance Data
We conducted comparative testing between the QP and XP lines, and the data is reported below:
Competitive product data is included for reference only, and may only reflect on the specific sample products being tested.
Analysis:
|
RPM Range
|
Model
|
C/W at 2 lpm (Low flow)
|
C/W at 4 lpm (Medium Flow)
|
C/W at 6 lpm (High flow)
|
|
900
|
QP
|
.057
|
.055
|
.0545
|
|
900
|
XP
|
.0595
|
.0585
|
.058
|
|
1200
|
QP
|
.043
|
.0405
|
.0395
|
|
1200
|
XP
|
.0425
|
.0417
|
.0401
|
|
1500
|
QP
|
.036
|
.0337
|
.0325
|
|
1500
|
XP
|
.0355
|
.0336
|
.033
|
|
2000
|
QP
|
.0305
|
.0285
|
.0278
|
|
2000
|
XP
|
.029
|
.0268
|
.0258
|
We can see above that in the 900 rpm range, the QP is better at any flow rate. Conversely, in the 2000 rpm range, the XP is better at any flow rate.
In between these two extremes, the results are flow rate dependant.
In low flow rate systems the XP is superior at any rpm range starting at 1200 rpm.
In medium flow rate systems, the QP is better at 1200 rpm, and the XP is better at 1500 and 2000 rpm.
In high flow rate systems, the QP is better at 1200 and and 1500 rpm,s and the XP is better at 2000 rpm.
MCRx20-XP specifications
|
Optimized fin-density for maximum heat dissipationwith medium speed fans (20 fpi)
|
|
2-pass, single row construction
|
|
Brass body and brass tubes
|
|
Louvered copper fins
|
|
Plenum Style: Self-purging brass plenum chambers
|
|
Slim form factor (34mm)
|
|
High-durability acrylic paint: Satin black finish
|
|
M3.5 threaded fan and case-mounting holes
|
|
Hub specifications & fittings compatibility:
|
|
ROHS compliant
|
|
Weight:
|
| Quality assurance: all radiators are ultrasonicallycleaned to remove solder flux as well as pressure-tested for leaks. |
|
What is Included with each radiator:
-
M3,5 x 6mm screws (4 each per 120mm fan) - Alternatively you may use 6-32 x 1/4" (not included)
-
M3,5 x 30mm screws (4 each per 120mm fan) - Alternatively you may use 6-32 x 1 1/8" (not included)
- Installation Warning pamphlet
-
No fittings
|
