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Post by reddrag0n on Jun 22, 2007 12:29:28 GMT
Steve, this is for you. Someone has done it! Took a Dual 1.8GHz 7448 and pushed it to a Dual 2GHz monster. The site is in French, so i have no idea what they are saying. Link to site
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Post by aquamac on Jun 22, 2007 15:37:12 GMT
I literally just saw that, we even have a small picture here. (the one in the middle). I knew it would happen one day and that processor was the only way it was going to happen. It would be nice to combine it with a monster Dual Rad water cooling system!!!! ;D
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Post by B B on Jun 22, 2007 15:42:22 GMT
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=224644But 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 .
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carrocka
New Member
PowerPC rocks!!
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Post by carrocka on Sept 13, 2007 19:34:55 GMT
Hey.. I have two questions: Which card did he use to overclock?Sonnet?NewerTech?PowerLogix?? How did he overclock it? Jumper?
thx phil
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Post by aquamac on Sept 13, 2007 19:54:21 GMT
It was one of these: Newertech 7448 Dual 1.8 overclocked to Dual 2 gig. Overclocked with jumpers!
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carrocka
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Post by carrocka on Sept 13, 2007 21:14:18 GMT
So I can buy this card, and if I'm able too cool it, than it's easy to overclock, because it's only jumpersetting???
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Post by reddrag0n on Sept 16, 2007 5:15:41 GMT
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.
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carrocka
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Post by carrocka on Sept 16, 2007 8:43:53 GMT
Am I limited to 2 Ghz?? Where can I find out how the jumpers have to be set?? Do you have a document or something where I can found out what different options I have to set the jumpers??
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Post by reddrag0n on Sept 16, 2007 13:19:33 GMT
The instillation manual can be found here. But here is a pic of the jumper settings they use. But i would only go to 2 GHz, if you go higher, you risk killing your cpu and motherboard. And i don't think they warrenty a fried cpu under drastic overclocking.
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carrocka
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Post by carrocka on Sept 16, 2007 14:48:11 GMT
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??
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Post by reddrag0n on Sept 16, 2007 20:46:23 GMT
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.
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carrocka
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Post by carrocka on Sept 16, 2007 21:30:23 GMT
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??
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Post by reddrag0n on Sept 16, 2007 21:50:05 GMT
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.
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carrocka
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Post by carrocka on Sept 17, 2007 19:21:36 GMT
I think I will do this at the end of the year when I have the money. I let you know how it works. But I will install the big watercooler very soon.
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