Waterblock Test – Joe
SUMMARY: OK choice for non-aggressive CPU cooling with moderate-high power waterpumps.
The good guys at PCCooler sent a their Sleeth I waterblock to test.
The Sleeth I features
- Quick release fittings for 8mm and 10mm tubing
- All copper construction
- Mounts for Intel P4 and AMD Socket A/K7
The Sleeth features a mounting system which concentrates all force on the center of the CPU – much preferred to other mounting schemes. Note also that it ships with two sets of fittings for 8mm and 10mm tubing:
The base appears well finished:
There were no polishing marks apparent to the touch.
The mounting system includes mounts for Intel P4 and AMD Socket A/K7 CPUs:
The Sleeth I was tested using the CPU Die Simulator and Waterblock Test Rig.
| Waterblock | C/W | Pressure Drop – psi | Pressure Drop – inches H2O |
| Sleeth I | 0.24 | 1.04 | 29.9 |
Unrounded data: 0.240 C/W with 0.0007 std dev.
Test Results indicate that the Sleeth I’s pressure drop (or head loss) across the waterblock is on the high side; flow resistance such as this means that the Sleeth I requires a moderate-large waterpump to maximize performance, depending upon how restrictive other components are in system.
I found that reducing flow to 0.5 gpm resulted in a performance decrease of about 0.7ºC and increasing flow to 1.44 gpm resulted in a gain of about 0.4ºC.
For a comparison of the Sleeth’s performance to other waterblocks tested to date, see Overclockers.com Waterblock Test Results.
The Sleeth I Waterblock is an OK choice for non-aggressive CPU cooling. Flow resistance is on the high side and performance is fair; the Sleeth I will require at least a moderate power waterpumps (300 gph) for best performance, as long as other components do not unduly restrict waterflow.
Thanks again to PCCooler for sending this our way to test.
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