Thermaltake BigWater 745 Cooling Kit

120mm Radiator/Fan Assembly

The 120mm Radiator and Fan assembly offers everything you would expect.  It uses aluminum thin-fin technology for maximum surface area.  It can be connected to a Thermaltake Rheostat to adjust the fan speed if you so choose.  At max setting, the fan produces a rated airflow of 93.7 CFM at 30 dBA.  The use of the 120mm fan allows it to run much quieter than it would with a smaller 80mm fan.  You'll also note the 3/8" OD line connection that has Thermaltake's screw type locking nut to hold the hose secure.  You will find these excellent hose connections at all points on the BigWater 745.

The radiator can be mounted internally or externally if you like.  At the top of the unit, there's a small slot that allows you to mount the radiator externally to cases with 80mm rear exhaust vents in addition to the 120mm exhaust vents the kit is designed for.

240mm Radiator/Fan Assembly

Another excellent feature of the Thermaltake Bigwater 745 kit is the larger 240mm radiator with two 120mm fans.  The kit comes with two feet that can be easily attached to this unit, so it can be seated with support be that internal or external of the case.  This radiator has the same type of grilling as the 120mm radiator and fan assembly, but the fans are not adjustable.  These fans each move 54 CFM of air at 26 dBA.

Pump and Reservoir

The Thermaltake Bigwater 745's pump and reservoir come as a single unit.  This assembly has screw holes where it can be mounted to the bottom of a case to hold it secure.  You'll also notice that the pump has another locking screw type 3/8" hose connector to hold the line secure.

This 12v pump connects via a four pin Molex and is rated to move 400 l/hr.  While the pump is in operation, it's almost inaudible, at 16 dBA.  I actually had to place my hand on the side of the pump to make sure it was still running, because I couldn't hear it over the ambient sounds from my case and the other fans.  The pump also contains a blue LED, which adds to the overall look of the Thermaltake Bigwater 745.

Water Block

The water block used was similar to the water block used in previous Thermaltake Kits.  The base is all copper with an acrylic top.  There is a blue LED inside the acrylic to give the UV Reactive coolant a nice looking glow.  The coolant follows a serpentine path through the block, maximizing the surface area that the coolant comes in contact with increasing heat transfer. 

Looking at the base of the water block, there were no noticeable blemishes and the factory lap job provided an excellent surface as you can see from the reflection of a pen in second pic below.  A little bit of thermal grease, and this baby should be ready to go.

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Pg 1 - Introduction
Pg 2 - Components
Pg 3 - Installation
Pg 4 - Performance
Pg 5 - Conclusion