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x1600 Clock Speeds
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Registered User
Join Date: Jun 2006
Location: MI
Status:
Offline
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So question is; I have my MBP in the mail as we speak. But what is the GPU underclocked too? And does anyone know if I can use an external program in windows to OC the GPU for while Im playing games in Windows?
Just curious.
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Grizzled Veteran
Join Date: Feb 2006
Location: Northern VA
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You can use Powerstrip, I used it before to overclock a 9800.
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iMac 24" | Core 2 Extreme 2.8GHz | 4GB RAM | 500GB HD
PowerBook G4 15" HR | 1.67GHz | 2GB RAM | 100GB HD
R.I.P 1995 Toyota Supra NA-T
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
Status:
Offline
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The X1600 Mobility card in the MacBook Pro is underclocked from 470 core/470 memory to 310/278... if I recall correctly, it delivers about the same performance as the X1300 or X1400 due to the underclock.
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Banned
Join Date: Feb 2006
Location: From Long Island, at college in Plattsburgh
Status:
Offline
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Performing this OC isn't always the greatest idea... right?
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
Status:
Offline
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It's a terrible idea, IMO. Apple didn't substantially underclock the GPU and VRAM just for sh!ts and giggles.
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Mac Elite
Join Date: Sep 2005
Status:
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It was most likely to conserve battery power, as I have no doubt that they've undervolted the GPU and RAM too.
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Fresh-Faced Recruit
Join Date: Sep 2004
Status:
Offline
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The 17" MacBook doesnt have fixed GPU clock speeds. They scale as required by the application. The following was taken from www.barefeats.com:
May 19th, 2006 -- 17" MacBook Pro has variable speed GPU! We were pleased with but puzzled by the dramatic speed jump in 3D gaming compared to the 15" MacBook Pro. But after receiving a tip from Michael Bean of AMUG, we rechecked the 17" MacBook Pro's X1600 GPU's core and memory speeds before, during and after running 3D Games using Graphiccelerator's "Show ATI Frequencies" function. Before starting a series of runs, the core measured 311MHz frequency. When we ran 3D games, it jumped to 423MHz. After sitting idle a few minutes, it fell back to 311MHz. We measured a similar jump in the GPU's memory clock from 297MHz to 450MHz. Now we know why the 17" MacBook Pro performed as well as the Intel iMac on the 3D Game tests.
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