1A-Cooling Blacklord 240 Watercooling Kit

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Watercooling Kit Test – Joe

SUMMARY: Outstanding performance.


Pic courtesy of 1A-Cooling

The good guys at 1A-Cooling were nice enough to send a sample of the Blacklord 240 watercooling kit to test. This kit features an external radiator assembly cooled with 2 120 mm fans.

Kit Components

The waterblock ships without the fittings screwed in – easy enough to do.


Size: 55 x 47 x 14 mm ex fittings – diminutive.

The base of the fittings includes a neoprene “O” ring to make it watertight. Tubing is attached by unscrewing the knurled ring, slipping it over the tube and tightening. To avoid the tubing from twisting as it’s tightened, moisten the tubing with a little water – it’s just enough lubricant to avoid twisting.

Note the dimple between the fittings – this is where the screw mount rides on the block.


A look inside the waterblock reveals a fairly restrictive design:

Inside WB

It looks as if there is a center channel that then splits out to two exhaust channels. The base is interesting:


It appears that there is a center copper strip between a brass base.

The mounting options cover every conceivable CPU; In addition, mounting force is centered over the CPU:


This is much preferred over other techniques, as the force is directed precisely where it’s needed without the possibility of canting the waterblock slightly off the die; you would be surprised at how much this degrades performance. Included with the kit is a small torque wrench:


A very nice touch! Slip it over the mounting bolt and adjust – I set it to 30 kg in testing.

The radiator is large:


Size: 290 x 135 x 80 mm; 2 120 mm fans @ 2200 rpm.

It’s powered by two 120 mm fans spinning at about 2200 rpm; I found noise to be busy – 62 dBA.

Tubing size is 8 mm ID:


The kit ships with a small vial of algaecide, brackets and screws for assembly.

The waterpump is a good one – an Eheim 1048:


This is a nice package that features an integrated reservoir; this is well constructed, using all metal parts. Note that there is no relay to turn on/off the waterpump with the system – adding one is not all that difficult (an example here).

Unfortunately, the sample sent to me was a 230 volt pump – I substituted a 120 volt Eheim 1048 waterpump with an integrated reservoir from another kit for testing purposes.


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The Test

The Blacklord 240 was tested using the CPU Die Simulator. I found fan noise at about 62 dBA (measured 8″ from the fan’s intake) – not excessively noisy but noticeable; consider adding a rheostat for noise control.

Blacklord 240 Die Test


Die Temp

Ambient Temp



Blacklord 240, 2218 rpm, 62 dBA¹





¹Measured 8″ from the fan’s intake; manufacturer dBAs usually measured at 1 meter.

Delta = CPU temp – Ambient Temp
C/W = Delta / CPU Watts

Interpreting C/W: For every watt (CPUw) that the CPU
consumes, the HSF will limit the CPU’s temperature rise to (C/W x CPUw)
plus the temperature at the HSF’s fan inlet. For example, at an ambient temp of 25 C, a C/W of 0.25 with a CPU radiating 50 watts means that CPU temp will increase 50 x 0.25 = 12.5 C over ambient temp, or 37.5 C. The lower the C/W, the better.

Die Simulator results place the Blacklord 240 in the top rank of watercooling kits tested to date (Heatsink Ranking).


The Blacklord 240 tested at the top of all kits tested to date – considering the quality components used, I felt this would perform very well. I have no doubt that the large radiator, cooled by 2 120 mm fans, has much to do with this level of performance; similarly, using a quality waterpump (Eheim 1048) with good waterflow adds to the performance-enhancing aspects of this kit. Well done!

For someone looking for very good kit performance with an external radiator, the Blacklord 240 is worth considering.

Thanks again to 1A-Cooling for sending this our way to check out. Distributors interested in these products may
email 1A-Cooling directly.

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