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I think the next trick will be checking if there are differences between the Sawtooth and Gigbit front panel connectors. Though, I think I can get some help from some of the EE guys at work. A search of the the xlr8yourmac forums yielded this link to a guy who's got a circuit that will step up an ATX power supply's 5v standby voltage into something suitable for the Gigbit mobo.īuilding that circuit could be a bit tricky for me as my soldering skills really are not that fantastic. the forums there) for other people who have successfully modified power supplies to use with the newer GigE and QuickSilver motherboards (which require the 28v "trickle"). Ok! I'm taking the plunge! I just ordered the mobo and the cheapie 400MHz G4 board! View image: /infopop/emoticons/icon_cool.gif If you already happen to have, say, JEDEC-compliant PC133 SDRAM, an IDE hard drive, and a ATX case just lying around, then why buy new? The other way you save money is by reusing existing components.
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Yeah, or you could do what I did, and buy a $50 GF2MX, and flash it to work with a PowerMac. You can save yourself probably $100 by lowering the vid card. As I said, I used a Apple Sawtooth motherboard for my project, which didn't need the 28V charge (no ADC). Even if you use a third-party CPU upgrade, like the PowerLogix 's, it's all compatible. Remember- you're still using an Apple motherboard, complete with Apple chipset. That's the downside of this- if you want to turn around and sell a homebrew PowerMac, it's worth less than a PowerMac in a Apple case. Yes, I was running MOSX until I sold my homebrew machine on eBay for a lousy $600.
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It also happens to be that the motherboard refuses to start unless it detects that 28V charge. So there's definitely going to be some modding of the power supply cable going on View image: /infopop/emoticons/icon_smile.gif Unfortunately, standard ATX power supplies only have 20 pins. MacResQ has the boards but if the picture of it is to be believed then the power connector on the left side of the board has 22 pins. Either that, or if somebody was handy with a voltmeter, they could probe all the pins on the power supply. If life were simple, somebody with a gigabit G4 would take a look at their mobo around the power supply and see if there's some indication of the function of the pins marked on the board.
#Server motherboard in a power mac g5 case mod
Which is why if somebody could give the pinouts then I could just mod a cable from a standard ATX and be in business. I think the reason they are selling these G4/Gigabit boards is that it's flippin' impossible to get a power supply. Well, the sites I've seen only have the board you're talking about. So far all I can find are 3 pci slot models. A 400MHz G4 running OS X with a Radeon 8500 would be just fine for me, thanks :-) My current rig is a PowerCenter pumped up to a 400 G3 with a SCSI card. that system isn't bad besides the 400Mhz G4.įor me, though "not bad" is relative. * Are my prices so off that I must be crazy to think this might be * Does anybody know the power pinouts for a AGP/Gigabit G4 * Am I crazy for even thinking of doing this? View image: /infopop/emoticons/icon_biggrin.gif So that's a G4/400 1Gig/60Gig/DVD+Zip/Radeon 8500 for about $50 more than the off the shelf refurb. Total: $1103 + busting my butt drilling/soldering a few things View image: /infopop/emoticons/icon_smile.gif The breakdown for the build-yer-own system is: I did a little cocktail napkin style cost analysis with no major shopping around for deep discounts: So that little piece of info is vital for this project to go forward. Unfortunately, the article warned that the project was done using the first rev of the AGP G4 boards and that the Gigbit G4 mobo has yet another pinout that is different from a standard ATX power supply. The procedure looked reasonable but the big hitch seems to be that G4 mobo expects a slightly different pinout for power than a straight ATX. So I dug around a little and I found an article on xlr8yourmac that talks about mounting a G4 in an ATX case. The way I figure it, the rest of the components can be bought from just about anywhere for cheap. Looking around, I've seen G4 processor cards (for G4 mobos) available for about $180, which also seems reasonable. The price on the mobo's is about US$200-250 which seems pretty cheap so I started to wonder if it would be cost effective/fun to put together my own G4 system.
#Server motherboard in a power mac g5 case how to