Fan broken! Replacement available?

Hi Deborah, you'll likely have to tell us the exact G4 since there were so many different ones.

At the Apple Icon at top left>About this Mac.

Then click on More Info>Hardware and report this upto *but not including the Serial#*...

Hardware Overview:

Machine Name: Power Mac G5 Quad
Machine Model: PowerMac11,2
CPU Type: PowerPC G5 (1.1)
Number Of CPUs: 4
CPU Speed: 2.5 GHz
L2 Cache (per CPU): 1 MB
Memory: 10 GB
Bus Speed: 1.25 GHz
Boot ROM Version: 5.2.7f1

If perchance it's an MDD model, see this...

http://www.xlr8yourmac.com/systems/g4mirrored_drive_doors/noise_reduction/g4_ddr_noisereduction.html

Is it this one, Apple part number 922-3295...

http://www.mac-pro.com/s.nl;jsessionid=0a0105501f432c0797d8932b4f0db6def3f357867 291.e3eSc34OaxmTe34Pa38Ta3aKbxr0?it=A&id=2239&sc=2&category=404

http://www.mac-pro.com/s.nl/sc.2/category.404/.f

I'm thinking you could find an equivalent or better fan cheaper, I don't know the dimensions, but...

http://www.newegg.com/Product/Product.aspx?Item=N82E16835103052&nmmc=OTC-Froogle&cm_mmc=OTC-Froogle-_-CaseFans-_-CoolerMaster--35103052

http://www.acousticpc.com/

Great news, thanks, do let us know the outcome please! 🙂

If you take out the old fan and:

Copy the data on the sticker on the Hub (manufacturer and part number).
Measure the distance between adjacent mounting holes in mm (e.g., 90mm)
Measure the thickness in mm (e,g., 25 mm)

You can look up the part number and find the maximum air moved in Cubic Feet per Minute (cfm), and the maximum sound level in deciBells (dB). You probably can only order an exact replacement from the manufacturer in the "handy" 10,000-pack.

You will need a same-physical-sized fan with at least the same air-moving ability, and quieter is better. A commercial office has about a 35 dB sound level, a chain saw about 95 dB, and the scale is logarithmic. \[Slightly bigger numbers are WAY louder.]

This site has an assortment that may help you see what is available:

http://www.buyextras.com/dc12vfans.html

The fan is a 120mm x 120mm x 25mm 86-88 CFM 12v fan rated at 35 or 37dB (Minebea and Senseflow, respectively).

Most any fan of the same dimension and equivalent or greater CFM can be used.
Splicing the OEM fan connector to the red and black lead of the replacement fan will allow for same as stock connection.
If a replacement is 3 wire, the yellow wire is simply not used.

Please don't spend 40+ on a 120mm fanlike the true replacement. Even the best fans in the computing industry retail for only about half that. In my opinion Antec and Noctua make thew best fans. Avoid sleeve bearing fans as many don't live past a year. The 120mm Noctua in my case even has a 6 years warrantee and when I held it in my hands you can tell it has amazing build quality. Very high end fan. I paid $18 canadian for it.

I bought one of these almost two years ago and have been very pleased with it, once I corrected a mistake I made when installing it (it needed to be positioned it so that the sensor was in the same orientation as the original fan's sensor).
It is quieter under light use, and about the same sound level as the original fan under load while moving about 20% more air than the original.