Cuplex Kryos review

The main target for Cryos is to create a waterblock capable of competing with currently TOP ones.

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Testing setup, performance results

Motherboard DFI LP UT X58-T3eH8
Processor Core i7 920@4400HT, 1.42V
Memory G.SKILL Trident 6GB F3-16000CL9T-6GBTD
Case Open bench table Banchetto 101
OS Windows 7 64-bit

Test system configuration

Theoretically, the amount of heat generated by CPU according to eXtreme Power Supply Calculator is 295 W:

Core i7 @ 4400HT 1.42V heat generation

Bench table consists of two separate WC loops — first one cools down the motherboard and graphic card, the second one cools the CPU. CPU water-cooling loop configuration (as the heat carrier runs inside the loop):

Pump Swiftech 355 (Laing DDC 3.2) with XSPC Laing DDC Reservoir/Top
Radiator Aqua Computer Airplex Revolution 420/360 with three D1225C12B5AP-15 fans
Flow meter Aqua Computer Flow sensor high flow G1/4
Heat carrier temperature sensor* Bitspower G 1/4″ Temperature Sensor Stop Fitting
CPU waterblock Cuplex Kryos XT
Data acquisition devices T-Balancer bigNG with SensorHUB module
Barbs Bitspower Premium G1/4″ High Flow 1/2″ Fittings
Tubing PrimoFlex Pro LRT Black Tubing 7/16″ ID X 5/8″ OD
Thermal interface Arctic Cooling MX-2

* sensor accuracy is ±0.25° after calibration

Flow meter data

Waterblock flow meter value comparisson chart

Despite similarities in waterblock and base designs, Cuplex Kryos XT has slightly less pressure drop — flow meter value of the waterblock inside the loop amounted to 5.9 liters per minute, whereas it reached 5.1 for Apogee XT.

And the most interesting — the comparison of waterblock performance. Small FFTs (Prime95 64-bit) stress test was used as system load.

Multiple wateblock installing/uninstalling showed no difference in overall test results:

Cuplex Kryos test

Apogee XT test

Difference between the maximum CPU core temperatures and heat carrier temperature reached 49.5°C for Apogee XT and 49.0°C for Cuplex Kryos XT.

To get the full performance picture we decide to test the waterblock in reference with the different flow parameter. Therefore, all test were repeated with the pump voltage at 10 V, 7 V and 5 V. All the findings were put to the following comparison table:

Testing data table

Graph based on that data were built to reflect CPU core and heat carrier temperature deviation in reference with flow value:

Waterblock efficiency in reference with flow data

To get final CPU temperatures add water temperature value. With water temperature at 25С CPU Core temperature are the following:

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