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View full Dell OptiPlex GX specs on CNET. Mainboard. Processor Socket. LGA Socket. Data Bus Speed. MHz. Chipset Type. Intel G Express. Buy Genuine Dell OptiPlex GX Motherboard Systemboard Mainboard For The Small Mini Tower (SMT) System, Compatible Dell Part Numbers: G Buy Dell Optiplex GX Tower Motherboard XF Motherboards – Amazon. com ✓ FREE DELIVERY possible on eligible purchases.

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Page 1 of 2 1 2 Last Jump to page: Results 1 to 15 of I refurbish computers and have worked on my opfiplex of Dells but I have a GX that emits fan noise like none I’ve heard. It runs a 3. I’m on my third fan and there seems to be no difference. I removed the heat sink, cleaned the processor and heat sink and applied Artic Silver thinking that might make a difference but there was no improvement. Any chance the mobo is contributing to the problem or does this combo just run really, really loud?

TIA for your thoughts Check the bios to see if their is a limit setting for the fan. You can also download a free system monitor here; My link. Problems cannot be solved by the same level of thinking that created them.

Unfortunately Dells use proprietary fan ducts, and you can’t fit a larger but slower fan. BATcher If it goes right, nobody remembers; g2x80 it goes wrong, nobody forgets. While your at it you can also check temperatures from within the bios. Build your own system; get everything you want and nothing you don’t.

Originally Posted by Clint Mtherboard. Thanks for your suggestions.

Dell Optiplex GX280 Motherboard

I appreciate your taking time to respond. I’ve downloaded the recommended system monitor and will see if it might help. I’ve used similar programs in the past successfully, but if I recall, they depend on information gleaned from the BIOS. I’ll add an additional bit of info. I have an identical GX with the same 3. I’m really beginning to think this may be a mobo issue. I was able to solve the problem associated with my Dell Optiplex GX this morning. Apparently the extremely loud fan was caused by a poorly engineered heat sink that was used initially by Dell.


I’m uncertain if Dell replaced the poorly engineered heatsink with the improved version, or simply offered the new version to those who complained about the noise. When a read a description of re-engineered heatsink, it sounded familiar and I found I had one among my other salvaged parts. I’ve attached pics for anyone who might be interested. The heatsink with two copper tubes is the one that came with the PC. The other one with added copper tubing is the improved version.

Changing heatsinks resolved the problem. Thanks again to all who were willing to offer help with this problem. Thanks for posting back with your resolution. Thanks, Ron – interesting solution that I was entirely unaware of. Originally Posted by RonnieV. So far it is working to cut the noise.

No guarantee, but worth trying. Racing CPU fan full speed when turned off! The computer worked fine when in use but as soon as my GX was turned off! I had it sitting to the side for months before I just now figured out the cause. Every time I opened the case it was okay but when I closed the case and the computer was off, it would start racing again. Then I noticed that the power supply cable bundle at the main board was crimped and one wire even had the insulator cut near the MB connector.

This is a “small form factor” GX, all the components fit tightly inside the case with little room to spare. Further checking confirmed that when the case was closed, the drives, attached to the case cover, descended and a corner of the hard drive cut into the power supply wires right near the connection to the mainboard.

Dell OptiPlex GX Specs – CNET

The result was that a green wire, if not others too, were grounded to the chassis and somehow that triggered the fan to start when the computer was turned off. Wrap the exposed wire with black electrical tape and then press the wires to lay on the opposite side of the connector away from the drives.


It was that simple! Changing the heat sink worked. I had another dead gx with the extra pipes heat sink. I’ve seen them on ebay for folks who are looking. I tried everything suggested here but nothing helped.

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Finally, I re-applied new heat-sink compound for the 3rd time. This time, however, after thouroughly cleaning the old compound off of both the heat sink and the chip, I used my finger to spread the compound around on the chipleaving a thin layer that covered the entire surface of the chip. Previously, I had been putting a small glob in the center of the chip and then just setting the heat sink down on top of it thinking it would spread itself just fine.

Obviously, it didn’t because now my system is running quietly and obviously, much cooler. I will try the solutions from here.

But i think i have already the “good” heatshink model. What’s the easiest way to become a member and start posting? How do I configure the display of members’ images and signatures?

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Dell OptiPlex

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