The only problem is the cooling. The guy adds a lot of fans but the machine is very noisy. The next step is to make a watercooling. It will be a self made copper plate to cover the CPU's. There a some pictures of different plates, but he must made one himself. On the site macbidouille.com, a thread is open and a lot of people are asking for some tests : forum.macbidouille.com/index.php?showtopic=224644
But another one was open before : before:http://forum.macbidouille.com/index.php?showtopic=220210
With this comment : Selon les bench de "CarnivoreImac" (c'est son pseudo) il fait aussi bien qu'un G5 bipro@2,5Ghz (sur lequel on aurais désactivé un des deux proc). Toutes applications confondues (encodage iTunes, vidéo, application de filtres sous 'toshop, copie de fichiers et compression de fichiers). C'est déja pas mal! En ce qui concerne la puissance brute (powerfractal) il fait mieux q'un G5 bi-2ghz (20 Gflops contre 13) ohmy.gif
CarnivoreImac, the name off the guy, has the bench with results as good as a dual 2,5Ghz with one proc desactivated for : encodage iTunes, vidéo, filtres under photoshop, files copy and compression and Powerfractal gives 20 Gflops the dual 2 Ghz has 13 Gflops .
2 Cases: Computer system inside G5 case with G4 MDD opening Door system and LCS inside MacPro case Mobo: Gigabyte GA-965P-DS3P rev 2.0 CPU: Dual 2 Quad 6600 2.4 GHz OV @ 3.27 GHz Graphic Card: XFX 8800 GTS 640Mb watercooled Ram Memory: OCZ FLEX XLC 4GB (4 x 1GB) DDR2 SDRAM 4-4-4-15 watercooled my hackintosh
Yes, it's just jumpers. But be warned. Those chips like to get extremely hot when they are overclocked. Either they are 1.6 GHz chips that are already overclocked or 1.8's I would do what Steve said and watercool the heck out of those chips. Make them stable at about 35 to 40 degrees celcius. That would make the cpu stable at high speeds. Especially at 2 GHz. Let alone 2 of them generating that much heat.
Do you think cooling is the main problem? I'm thinking about a triple or quad radiator watercooling system. If I'm able to stabilize the temp between 35 and 40 degrees with 2267 Mhz for example, then can I also use this clockrate??
Yes, cooling would be the main concern. Since all it has is an aluminum heatsink with a couple of 60mm fans attached to it. As for a triple or quad rad, where are you going to put it? A Quicksilver has next to no room inside that case. At least mine doesn't. But anyways, i would stick to 1.8 to 2 GHz at first. Then try to go up from there. But like i said before, you risk frying the cpu. If you fry that, then your SOL. And i don't know if the motherboard BGA connector can handle that heat which in turn will melt that and cause it no never accept another cpu. All i can say is be careful. I know we all want our G4's to be as fast if not faster than a G5 or Mac Pro.
Am I able to read out the temp of the NewerTech upgrade with TemperatureMonitor for example? I actually can not read out the temps of my original dual 1 ghz cpu. Do you think still booting up the new upgrade at 2.2 ghz for example will case serious damage??
I wouldn't know. I don't have one of these upgrades. I have an original 733 non L3 overclocked to 800. Best bet is to try it and see. As for serious damage, i wouldn't be surprised if at 2.2 you get a kernel panic. Or it just won't boot up. But it's not my cpu so i wouldn't know. Try it, report the speeds and settings and get back to us on it.