However, in the case that your fourth pin does not provide PWM or a constant +5V, or if you’re using a 3-pin motherboard header, then you must borrow +5V from the PSU’s molex connector. However, when I connected all 4 pins to the motherboard, pin 4’s output dropped to around 3.5V - this is insufficient to drive “max” PWM for the G5 fans. On my Gigabyte 970A-UD3P motherboard, which uses an ITE 118620E, pin 4 was listed as “Reserved” and output around 4.97 volts constant - this imples +5V VCC, not PWM.
The basic pinout for using the motherboard’s 4-pin header, in text, is: G5 1(PWM1) to HDR 4(PWM) If you do not have a 4-pin female connector, then a floppy-style molex connector will also fit the motherboard’s 4-pin header.
#GAMES FOR POWER MAC G5 PC#
The basic notion is to use the PC motherboard’s 4-pin fan header to drive the G5 fans.
The more common 3-pin motherboard header is the same as the 4-pin, but missing the fourth PWM pin: GND 12V SNS The back CPU fans use the following pinouts: PWM1 S1 GND 12V PWM2 S2Ĥ-pin ATX motherboard headers, such as those used for the CPU fan are: GND 12V SNS PWM The front CPU fans use the following pinouts: PWM1 S1 GND 12V PWM2 S2 TMP- TMP+ The “blower” hard-drive bay fan uses a 5-pin connector, however the 5th pin is not connected, so you can safely ignore it: PWM SNS GND 12V The regular hard-drive bay fan and the PCI fan use the following pinouts: PWM SNS GND 12V Note that, according to some vague forum sources, you could also tie SNS_SEND to SNS2_RETURN to allow for selection of the device from the operating system: G5 17(AUDIO RIGHT) to 5 (LINE_R)Īll PowerMac G5 fans use the same basic pinout of PWM, SNS, GND, 12V, from pin 1 to pin 4, respectively. G5 16(AUDIO COM) to 2 (GND) - one schematic also tied in 4 G5 15(AUDIO SENSE) to 10 (SNS2_RETURN) - one schematic tied 10 to 7 Additionally, the most “officious” (most commonly found) G5 front panel pinout had pins 11 and 12, aka USB- and USB+, reversed! According to the official Power Mac G5 Service manual, which covers the Power Mac G5, Power Mac G5 (June 2004), and Power Mac G5 (Early 2005), pin 11 is USB- and pin 12 is USB+. Show less.So as to alleviate foolishness, the G5 front panel pinouts, as sourced from the 2005 Power Mac G5 Service Source manual, are: <- Locking plastic notch is on this sideįor some inexplicable reason, other people’s front panel diagrams were pretty screwed up - USB0- to USB- and USB1- to USB+ and similar. Please remember that deleting cookies may affect your experience of our website. Please read our Privacy Policy and Terms of Service which provides important information about the cookies we use, how we use them and how they can be deleted. Some cookies are also necessary for the technical operation of our website. Cookies allow us to recognize your computer and improve your experience on our website. Cookies are text files containing small amounts of data which are downloaded to your computer, or other device, when you visit a website. This website uses cookies to maximize your experience and help us to understand how we can improve it.
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