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First build attempt

by George
(Ireland)

Hello again Monte and many thanks for your earlier reply. Regardless of all the good advice I received I've had no joy.

I have come to realise that the motherboards on both the old Dell's I'd problems with (the GX270 mini-tower and the GX280 desktop) appear to be past their best days. Computers seem to be very temperamental and get me increasingly frustrated but I am soldiering on. Despite all I have tried and all the advice I have received I have been unable to get any further with them so I am adopting a different approach. I returned to my friend in the computer shop and advised him of the situation and he very kindly gave me a brand new mobo still in its bag and a heatsink and fan to go with it. Armed with this I decided to cannibalise the Dell's + another couple of old machines I had lying around and try to make one reasonably good machine,that hopefully works, from the parts. With cash being tight and all I'm trying to get away with using as many used parts as I can. This will be my first time trying to do this - make a working computer from the components.

I extracted a P4 (Intel 845G-socket 478 I think) from an Optiplex 260 desktop, a P4 (Intel 845G-socket 478 I think) from the Optiplex 270 mini-tower and a P4 (Intel 915G - socket 775 I think) from the Optiplex 280 desktop. I also extracted 2 DVD players, one CD player and have the neccessary memory, a SATA 320Gb HD, any amount of ATA HD's and Win XP and Win 7 O/S. One of the cases of an older machine , not a Dell, fits the new mobo perfectly and only the PSU from the Optiplex 280 will fit the new mobo (24 pin connector) but it fits in the case snugly and has the SATA connectors. If the 24 pin PSU turns out to be faulty can I use the older PSU with the 20 pin connector and ATA connectors? I have the ATA to SATA extras.

The new board I got, while by todays standard is oldish, should do the trick as it has DDR2 and a PCI slot which is all I really wanted. It is called an MSI 945GM3.

As this is my first attempt to put one together from scratch I was wondering if any of the above processors will be compatible with this mobo. And where and how exactly do those tiny front panel connections connect. The writing on the mobo is miniscule. I'd have to get a magnifying glass and even then I wouldn't be sure exactly which way to connect them. I'm not sure if there's anything else I should be asking before putting it all together and trying to switch it on but if you can think of anything I'm forgetting it would be appreciated.

Apologies that this sort of covers more than one question but it would take me forever trying to do this one question at a time.

Again,
Many Thanks,
George.

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First build attempt

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Sep 23, 2011
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Building a PC
by: Support

Hello George,

The connectors you are looking at are for:
Power Switch
Hard Drive activity LED
Power Led
Reset button (if the Dells had one, can't remember)

Check the the header (that is the connnector on the motherboard that has the pins sticking up) on one of the other motherboards and if you can't read the paint mask (the writing) trace each wire back to what it connects to on the case, then write it down because you don't have the motherboard manual to show you which set of pins got to what item on the case.

Sounds like your doing what I did when I first started building my own computers, in the mid 1980's money was tight for us and not much for playing with computers, did a lot of scrounging for parts.

The differance between then and now is that doing low level was easier because the IC were bigger and the PCB only had two to four layers. Now you have micro IC's and ten to fifteen layers, not easy to repair now days.

Good luck with your build!

Sep 30, 2011
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Front Pannel Pins
by: Kermit

Have found this exchange to be quite interesting. I would like to comment.

I resently purchase an outdated Intel P4 processor, an Intel Motherboard 775 socket, and 1gig of 400 memory.

When all arrived I found that there was no motherboard manual though the website indicated that there would be one.

I have in the past when repairing computers learned who made the monterboard and have gone to their site and downloaded the manual for it.

Yes, reading the fine print on the headers is something I use a magnafing glass for also. The Intel board had the Pins for the power switch / Reset switch and the Power and hard drive LED power pins for polarity in reverse of the modern boards.

Good thing I was able to download the manual before I connected the front pannel header as there were no micro writings indicating which pins were for what only a color code.

Please let us know how this project turns out.

I personally, have learned all I know about computer repair and builds from this site and recomend all who I meet to visit this site.

Sep 30, 2011
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Front Pannel Pins Follow-up
by: Kermit

This is the Url for the download page of the user manual for the MSI motherboard you have:

http://www.msi.com/service/download/manual-4567.html

Again good luck.

Kermit. El Paso,
Texas, U.S.A.

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