Tuesday, July 1, 2008

Installing a PC motherboard into a quicksilver G4 case

I have had an Apple G4 quicksilver case in storage for some time now (Thanks to Wade for hand carrying it all the way from Brisbane).  My original reason for getting it, was to house my Imac G5 logic board.  Well... after measuring the inside dimensions of the case,  I found out that there is no way I'm going to make this fit, unless i do a lot of sawing and hacking, which would leave very little of the case intact and part of the logic board would probably be sticking out... this somehow defeat my purpose of retaining the external (and if possible internal) appearance.  

This Imac G5 logic board is now running attached to my desk and is what I use to update this blog, I will leave this topic for another day.

Anyway.  I looked around for a good place to buy some cheap parts.  I am putting this together as a MythTV box so I brought that into consideration when choosing the parts.  After searching around, I found  this low price computer store http://msy.com.au.  

After looking through their price list, I ended up with the following:

Motherboard:

I was choosing between a Gigabyte 945GCM-S2L and an Asus P5GC-MX/1333.  They are mostly identical (layout, chipset, etc.)   Well, the Asus costs $2 more, but the Gigabyte has 10/100/1000 onboard ethernet, whereas the Asus only had a 10/100.  So I ended up with the Gigabyte.  $59.

Processor:

At that time the quad core processors still costs a fair bit (plus MythTV isn't going to need that much CPU power.) Based on the MythTV forums, even the lowest end E2140 is more than enough for what I want to do.  Balancing the costs (and the thought that I might use this as a desktop computer later on)  I ended up with a E2200.  $107

RAM:

1G DDR2 Kingston. $32

Hard Disk:

Seeing that the main reason I want to upgrade my old MythTV box, is so that I can record/watch High Definition (HD) content.  The old box can actually do that, but the onboard SIS video chipset only displays a weird green screen whenever I try to display HD content.... plus it didn't have an AGP slot.. only 2 PCI slots which was already taken up by the 2 tuners I have.  So I thought a really big drive would be helpful... I could record months of shows before I need to erase some.  So after considering everything,  I chose a 750 Gigabyte seagate hard drive.  $247.00

That's all the parts that (I thought) I needed.  Next was to test fit the motherboard:

Looks like a good fit.  Once I could modify the back panel the PCI slots should line up properly with the apple back panel covers just right.

Next problem is the G4's power supply is not standard ATX.  To make matters worse, it looks like it's broken.  At that time I couldn't be bothered to attempt to repair it (I may someday) so I just decided to put the innards of an ATX power supply in the G4's power supply case.  This preserves the look at the back and the power cord still goes into the same place.

Shown here on the left is the original Apple power supply,  on the right is the cheapo ATX power supply.  Size is almost the same.  No modification was needed to transfer the ATX innards except drilling a few screw holes. 
Here is the ATX parts screwed on the Apple power supply case.  You can see some of the screw holes have to be enlarged, and one (upper left) has to be drilled.
Here it is all screwed up and working. 

I then somehow managed to modify the case so that the motherboard fit.  I had to cut a hole in the back panel because the G4 wasn't ATX standard.  I had to remove some of the original screw standoffs because they dont match the motherboard's and they would short something out if I leave them in place.  I then replaced them with metal PCB standoffs.  I remember after having done all that the case refused to close and I had to desolder some of the capacitors and mount them lying down to keep them from hitting some part of the case.  In the excitement I also somehow forgot to take any pictures of this and all I have is the finished product:
   

  
I will someday have to take this all apart for cleaning, and I will take some pictures and update this entry.

13 comments:

CITA 320 - Supercorp said...

Can you email me ay JordanSPE@gmail.com. I am doing a similar mod and ran into an issue with the RAM sticks hitting the CD drive bay. I assume you’re using a mATX board so how did you get around this?

Jonnyboy said...

I sent you the email. For the sake of other readers...

I recall having to desolder some capacitors and either put them back on the back side of the board (there were lots of room). My ram sticks also hit the cd drive bay. I used a dremel and cut away the offending portion. DVD drives nowadays are much smaller so that was not a problem.

tllotpfkamvpe said...

That's the best and cleanest G4 mod I've seen so far. I just got the same case and mobo and want to try minimal moding on the case (without hacking huge chunks of metal). Was wondering if you got the front reset/power switch and LED working? My case also has a working speaker, any advice on where to wire it on the mobo?

Jonnyboy said...

My case did not come with the reset/power/LED board, but I constructed my own using a perfboard and some switches and LEDs. I wired a green LED to the power light and a yellow LED to the hard disk. both show up on the power button. You may want to use one of the internal motherboard line outs meant for the front speaker jacks. You will probably need to have an amplifier hidden away (maybe in one of the unused drive bays?)

dkvfx said...

I came across this inspired by Psystars Snow Leopard installer. I'm thinking of taking my old G4, rebuilding it into an Intel, then installing Snow Leopard. Behold... like Frankenteins Monster...It's alive!!!!

mo said...

Do you think I could mount my pico btx MB on this?

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Ridhi Web Expert said...

Can a system operating ready hard drive be connected to a different pc motherboard?

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sharma said...

Can a system operating ready hard drive be connected to a different pc motherboard?.
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Unknown said...
This comment has been removed by the author.
Unknown said...

I too will attempt this with a microATX board and EFIX boot processor to run Snow Leopard.

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sharma said...

I just simli dont have any sound in game tried everything. I have no singularity in Mixer.


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