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Dell XPS 630i Upgrade Questions

I am upgrading the hardware in an old Dell XPS 630i desktop. The case is exceptionally good but the components were just not sufficient for my purpose any more, they are at least 8 years old.

I have removed the motherboard and PSU and upgraded as follows:

Motherboard: GIGABYTE|GA-Z97X-UD5H Z97
PSU: LEPA| B1000
CPU: INTEL|CORE I5 4690K
RAM: MEM 8Gx4|GSKILL F3-1866C10Q-32GAB
Fan: CASE FAN FRACTAL | FD-FAN-SSR2-92

My questions are related to the fans in the system. I left the two original fans in the front of the Dell case that came from the factory. I may have to change them out at some point but they were working just fine before I upgraded the machine. However now that I have installed all of the new hardware, none of the case fans are running. I connected the two original front fans to the fan connectors on the small circuit board that Dell installs on the XPS machines to run the front panel. The new case fan that I added to the rear of the case is connected to the fan connector on the small circuit board that Dell installed in the PC at the factory. It is connected to the front panel circuit board via a wire connector. Here are my questions:

1. Should the three case fans be running all the time or just when temperature elevations dictate the need for additional airflow? I have had the machine up and running now for about 3 hours installing windows, reformatting HDDs, etc. and none of the three fans have kicked on one time.

2. Is the small circuit board on the back of the Dell case meant to run a case fan? I can't imagine what else the four pin connector would be used for.

3. Was there some proprietary software in place when Dell built the XPS that controlled the fans through the front circuit board that has now been lost because of my rebuild?

I realize there may be a very simple answer to this question but I have tried everything I can think of, short of plugging the fans directly into the new MB, and nothing works. I have searched several Dell forums, including the 630i forum, and cannot find anything that speaks to this specific problem.
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John
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Newer mechanical designs from a good manufacturer are often better than 8 years ago. Fans 8 years old will die sooner rather than later. You are replacing most of the parts anyway.

Is it not time for a new box?  Better all around. Dell was never a shining start of computer design.
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the fans should be plugged into the motherboard directly
I usually disconnect case fans and only use the internal PSU and the CPU fan. Those are most of the time good enough. The additional fans just tend to increase the noise. Besides that, modern CPU's tend to run cooler than older ones, so less heat is produced.

I only need extra fans if it really is necessary.
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gacto

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John - The XPS case that I have is actually a good case, sturdily built with a ton of room. However it does have the little Dell quirks that everyone came to despise about Dell products, or at least I did. I agree with your comment about the 8 year old equipment dying but I was certain the fans in the front of the Dell case were working fine. However, since I posted this I have started testing them and I now believe that at least one of them, if not both, are dead. So goes my theory of reusing the parts I already had on hand...

David - I am testing that now to determine what I have that works and what doesn't. It appears that my original fans are dead, as I mentioned to John. The new fan works perfectly when hooked into the motherboard directly but will not work when connected to either the front or rear circuit panels. I can't figure out what is the missing link here. I assume those circuit boards must not be getting the necessary power, but I don't know why not. They are both controlled by a USB connection to the main board which should provide enough power to run the basic functions of those boards.

rindi - My purpose for the extra fans is because the location this box will be in while in production is already a "warm" environment. I don't have other options of where I can have this box running so I am trying to make do with the situation at hand. I only put the extra fans in place to help move as much heat out of the case as possible. It may be overkill on that respect, but I am attempting to err on the side of caution in this regard.
Thanks for the comprehensive update and please keep us posted.
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gacto

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No points for me but given this is turning into a project for you you should make sure you had this
ftp://ftp.dell.com/Manuals/all-products/esuprt_desktop/esuprt_xps_desktop/xps-630_service%20manual_en-us.pdf
which would have explained what was happening.

Still remember that pretty case wasn't designed to cool your new board and components - keep an eye on system temps (even with the fans powered up).
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ASKER

masq,

Thanks for posting this. I searched far and wide for this document and could not find it anywhere. I will keep it for future reference.
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ASKER

I realized after posting the question the solution was in a post I had already read, I just overlooked the portion of the solution which was specific to my problem.