Noisy Optiplex 745

Question

I specially bought an optiplex 745 SFF because I was charmed by the the ultra low noise level of the previous model GX620 and as a replacement for a noisy Shuttle. Unfortunately : the optiplex 745 makes more noise than an poweredge 1800 server and much more noise than a Shuttle. I can't concentrate with such a high noise desktop around me. has any one an idea how to reduce the noise.

speedstep · Answer

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catherines · Answer

I was v. interested to read your posting. I have to use voice recognition software because I am disabled and I need a machine that is both powerful and quiet. Am trying to decide btwn the Optiplex 620 and the 745. SO you found that the 745 is noisy? What were the specs you had on the 620 and the 745? I thought the 745 might be quieter because it uses less energy but from what you say....

speedstep · Answer

Quietest machines tend to be the laptops. Not cuz its designed that way but because they have itty bitty fans in them.

Wirtec · Answer

specs of my home-pc are
standard dual core processor, 2 GB ram, 250 GB HD, DVDwriter drive, very fast machine.

the difference in noise compared to the optiplex GX620 (my pc at work) is huge, gx620 is a very quit pc.

catherines · Answer

sorry to bother - but your 745 has what kind of processor? and what chassis is it? and what kind of processor does the gx620 have - and is it the small form factor? (tryhing to figure out if noise difference is model, chassis, processor, etc) tnx!

stonent · Answer

The 745 externally and internally appears to be the same exact chassis as the 520/620 platform. The only difference is more SATA power connectors on the PSU and the case plastics are black instead of charcoal.

Wirtec · Answer

both computers have a ultra small form factor chassis

the gx745 comes with a Intel CoreTM 2 Duo Processor E6400 (2.13GHz, 1066MHz FSB, 2MB L2 cache), VT, EIST processor.

gx620 I'm not sure of the processor have to look tomorrow at work (it's not a dual core, of that I'm sure)

one of the components that makes the most noise is the 250GB disk which is not the standard capacity, that might be the problem.

stonent · Answer

The GX620/520 can come with a Celeron D, 64 bit Pentium 4 HT, or Pentium D. It will also boot with a 32 bit LGA775 processor but I don't know if it was ever sold with one.

grayvader · Answer

Sounds (no pun intended) like your machine isn't working properly.  Definitely give tech support a call.

catherines · Answer

Did you ever resolve the noise issue with your 745? Trying to decide whether to buy it.

Wirtec · Answer

No, I didn't Next week I'll receive another gx745 at work and will test the noiselevel again. I'll leave a message after testing. this testmodel will have the standard harddisk (mine is 250GB)

catherines · Answer

Tnx. So was your noise in the old one hard drive related noise, or fan noise? Any idea what the speed of the hard drive was?

catherines · Answer

Just wondering, did you get the new 745? How was the noise level?

Lieven_Embrecht · Answer

I have the same problem with a Optiplex 745 SFF. I was used to an SX280 SFF which was ultra quite. The 745 is quite noisy compared to the SX280, i immediatly noticed much more vibration too on my workspace. It can't be the disc since i moved the 250G disc over from the SX280 to the 745. So my guess would be the processor cooler or the central cooler unit. Amazing since the core 2 duo technology is supposed to produce LESS heath than the pentium 4 technology, and in fact the cooler at the back seems to blow a bit cooler. Dell uses cheaper heath components maybe ?

colpat · Answer

We have just received a shipping of GX745's and found that 3 in the first 10 that we have unpacked and installed all run very noisy. The fans normally run silently unless the CPU tables call for the speed of the fan to increase to cool the cpu under heavy load..   The noise is due to the blower running fast. I looked in the bios screen error log under ' maintenance' and found that the ambient temperature probe is ' out of range'. It was clocking this error every few minutes.   The fix was to replace the sensor. Part number NJ889. The sensor is clipped onto the metal mesh casing in front of the blower.   Colin

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