D-TEK Spiral Waterblock

Waterblock Test – Joe

SUMMARY: OK choice for CPU cooling with moderate power waterpumps, although this design is showing signs of age.


My pal Brian had a D-TEK Spiral waterblock floating around and was nice enough to send it to me for a test.

The Spiral features

  • ½” hose barbs
  • Copper base
  • Anodized aluminum top, O-ring sealed

You will notice below that the Spiral’s pressure drop is fairly low – this is due to its interior design:


Even though it’s a spiral design, the channels are very wide; note also that the side of the channels are grooved:


The base shows some minor signs of wear:



The Spiral was tested using the CPU Die Simulator and Waterblock Test Rig.


Test Conditions: Inlet Water Temp: 28.5 C; Mounting force: 15 pounds; Heat Load: 70 Watts.




Pressure Drop – psi

Pressure Drop – inches H2O

D-TEK Spiral




NOTE: These results are NOT comparable to tests done by others.
Unrounded data: 0.194 C/W with 0.0023 std dev.

Test Results indicate that the Spiral’s pressure drop (or head loss) across the waterblock is relatively low; flow resistance such as this means that D-TEK’s Spiral should function very well without using a large waterpump, although anything less than 300 gph might compromise results, 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 1.6ºC and increasing flow to 1.5 gpm resulted in a gain of about 0.9ºC.

For a comparison of the D-TEK’s performance to other waterblocks tested to date, see Overclockers.com Waterblock Test Results.


D-TEK’s Spiral Waterblock is an OK choice for CPU cooling, although it is an older design compared to newer waterblocks on the market. Flow resistance is fairly low; the Spiral will perform very well with moderate power waterpumps (300 gph), as long as other components do not unduly restrict waterflow.

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