Task at hand:
Replacing factory default ADDA PWM fans (AD0812VB-A7BGP) in HP Z800 Power Supply (Delta DPS-1050DB A), due to high-pitch whirring sound they start to generate, after about 5min. from cold start up.
Replacement fans: Arctic Cooling F8 PWM
Fan connector is standard 4-pin, differs a bit from HP proprietary 4-pin connector, so it doesn't fit the fan header in PSU out-of-the-box. This can be fixed by removing an inner plastic key/ridge on the AC F8 fan connector.
Problem to solve:
Wiring (color) scheme of ADDA AD0812VB-A7BGP fans appears to be reversed, compared to standard 4-wire PWM wiring/pinout.
- International Standard:
1. GND (black), 2. 12V (yellow), 3. TACH or RPM SENSE (green), 4. CONTROL or PWM (blue) ;
- Common OEM variations:
1. GND (black), 2. 12V (red), 3. TACH or RPM SENSE (yellow), 4. CONTROL or PWM (blue) ;
1. GND (black), 2. 12V (red), 3. TACH or RPM SENSE (white), 4. CONTROL or PWM (blue) ;
- ADDA AD0812VB-A7BGP:**
- blue 2. white, 3. red, 4. black ;
** Based on perceived pinout – the right-most pin of the fan header on PSU PCB is marked with silkscreen printed »1«.
It is utterly confusing, to say the least – is the fan header pinout reversed in Z800 power supply, or the color scheme order of the fan wiring ?
Has anyone else gone through this dilemma ? Any help would be much appreciated (fan header pinout, Service Manul or schematics for Delta DPS-1050DB A, etc.).
Kind regards,
Sebastian