Swiftech MCR X20 DRIVE REV2 - Manual (Page 4)

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4. Electrical connections, pump general operations, specifications, warranty
a/ Electrical installation:
The pump uses two connectors: a standard Molex 4-pin (2 wires are used only) which connects to the PSU power connectors, and a standard 4-
pin (2 wires) which typically connects to the motherboard CPU_Fan 4 pin header.
The 4-pin connector allows the motherboard to fully control the pump speed from 1300 rpm up to 4500 rpm. If not connected, the pump will run at
full 4500 rpm speed by default. The following graph reports the pump speed response to % adjustments in the BIOS:
Pump and
fans connections
To Motherboard 3-pin header or to power
supply using a standard 3-pin to Molex
extension (not included)
To Power
supply
To Motherboard
CPU_Fan 4-pin
header