[billbartuska]

Originally Posted by NeoReaper

does it make sense to have more than one eheim 1250 waterpump in a watercooling setup. i considered upgrading my pump but then i started wondering if it would make more sense to purchase a 2nd one instead.

ben805 on xtrenesystens.org, 04-04-2006:
http://www.xtremesystems.org/forums/...ad.php?t=95014

Quote

Straight from Cathar at http://forums.procooling.com/vbb/sho...t=10825&page=8

Did a heat-dump test on the RD-30. It's heat dump into the loop is actually fairly high, despite being a magnetic armature design. This is supported in that the casing barely gets warm.

Basically measured that around 83% of the pump's power draw gets passed into the water during in-line use.

Pump was measured to draw 28.1W. Calculated heat dump was 23.2W, with around an estimated 10% margin of error on that value.

Plugging that back in to the maths of the first two posts, this works out to:

+20.7C => Iwaki RD-30 @ 18.0v
+20.8C => 2 x Swiftech MCP600 @ 13.8v (series)
+20.9C => Swiftech MCP600 @ 13.8v
+21.1C => Iwaki MD-20RZ @ 60Hz
+21.1C => 2 x Swiftech MCP600 @ 12.0v (series)
+21.2C => Iwaki MD-20RZ @ 50Hz
+21.4C => Swiftech MCP600 @ 12.0v
+21.4C => 2 x Eheim 1048 (series)
+21.5C => Iwaki MD-15R @ 60Hz
+21.6C => Swiftech MCP650 @ 12.0v
+21.6C => Iwaki MD-30RZ @ 50Hz
+21.7C => Iwaki MD-30RZ @ 60Hz
+21.9C => Eheim 1250 <=================
+22.3C => Eheim 1048
+23.3C => Eheim 1046

End quote