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Overclocking 8800 in the iMac
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Forum Regular
Join Date: May 2004
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Is it possible to overclock the underclocked 8800GT in the high end iMac under bootcamped XP?
I know its underclocked for heat reasons but I guess amping it up + amping up the fan is possible. But well I dunno.
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Dedicated MacNNer
Join Date: Jun 2005
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The answer is YES! You'll needed to use RivaTuner but also most will say this is more geared towards MacPro's for the reason that you may need to change your Fan too?
I've only seen MacPro users so far do this overclocking so do report back for any others whom maybe interested in doing the same.
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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Sure, it's just like any other nVidia GPU... download the usual (Coolbits, ATITool, RivaTuner, etc) and go crazy.
Note it's desktop 8800 GS, so I doubt there's much overclocking headroom in the iMac enclosure; not sure if heat or power consumption will stop you first.
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Moderator  Join Date: Apr 2000
Location: Gothenburg, Sweden
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Do we know that it's a desktop 8800GS? That model does not support 512 MB of RAM (only 384 or 768MB, because of the odd 192 bit memory bus), so I always doubted that. More likely, IMO, is an 8800M GTX or similar. Has anyone checked the exact model reported by Windows?
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Last edited by P; Jun 1, 2008 at 11:41 AM.
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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Originally Posted by P 
Do we know that it's a desktop 8800GS? That model does not support 512 MB of RAM (only 384 or 768MB, because of the odd 192 bit memory bus), so I always doubted that. More likely, IMO, is an 8800M GTX or similar. Has anyone checked the exact model reported by Windows?
Augh, more of Apple's video card rebranding shenanigans? I just saw 8800GS and knew there wasn't a mobile part that nVidia calls that.
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Moderator Join Date: Apr 2000
Location: Gothenburg, Sweden
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I think that they don't want to advertise that there is a mobile part in the iMac - they have stopped showing the CPU model numbers completely - so they advertise the closest equivalent desktop part. Really, really annoying. Can't someone who has one please reboot into Windows and check what chip it really is?
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Forum Regular
Join Date: May 2004
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read on macrumors forum. its actually a 8800m GTS.
and here i was expecting an underclocked 8800GT  kinda disappointing.
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Last edited by underwood; Jun 9, 2008 at 11:07 AM.
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