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Finally got around to replacing the 4 80mm 40 decibel fans in my Origin 300 this morning. The noise from this one server was enough to travel from the basement inside a rack all the way to the 3rd floor Master Bedroom. Suffice it to say, I definitely couldn't run the server 24/7. Hunting around on Amazon, I found these 80mm Cooler Master fans, not too bad price wise and still put out decent air flow. [caption id="attachment_963" align="aligncenter" width="225" caption="New Cooler Master 80mm replacement fans for my SGI Origin 300"][/caption] Prep for the swap: [caption id="attachment_964" align="aligncenter" width="225" caption="My Quad R14k SGI Origin 300"][/caption] The original fan in case someone needed a part number: [caption id="attachment_965" align="aligncenter" width="225" caption="SGI Origin 300 Stock Fan"][/caption] As I was swapping in the new fans, I realized the fan connector was not the standard ATX style. Stock Connector: [caption id="attachment_966" align="aligncenter" width="300" caption="Stock SGI Origin 300 Fan Connector"][/caption] Versus the standard ATX connector: [caption id="attachment_967" align="aligncenter" width="300" caption="Repacement Cooler Master Fan ATX Connector"][/caption] Luckily the standard 4 pin Molex power connector for the 2 Ultra 160 drives is right next to the fans, so a little wiring job and voila: [caption id="attachment_968" align="aligncenter" width="300" caption="SGI Origin 300 with replacement fans installed"][/caption] Note, doing it this way will throw an error in the L1 Console and will shut your machine down. A way around it is to simply connect to the Origin 300 over a console connection and type: env off. This is dangerous though as the server will not shutdown automatically if a fan fails or the server overheats. Having said that, it came to my attention that IRIX does not install a Serial/Terminal client by default. The common cu is on the IRIX 6.5 Foundation CD 1 disk. Turn on the Subsystems Only in the IRIX Software Manager and scroll down until you see it. Chances are you're not running a base 6.5 install so you'll also need the first disk of your overlays (6.5.30 Overlay CD 1 in my case) in order to install it to resolve the package conflicts. After installing you may receive a "CONNECT FAILURE: NO DEVICES AVAILABLE". Open up vi or your favorite text editor and open up /etc/uucp/Devices Add in a line: Direct ttyd2 - 38400 direct Make sure the spaces are there. You can also try setting it up via the Serial Manager under the System Manager application. Afterwards, simply running: cu -l /dev/ttyd2 -s38400 Allowed me into my L1 console to turn off environment monitoring. Then hit Control + D to get back into the PROM Monitor and hit "1" to start IRIX.