Ivy B Power Draw of GPU

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buai

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Aug 28, 2013
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I'm interesting in knowing the power draw of the integrated GPU in Ivy B mobile procs.

For example, Ark lists the TPD of the i5-3210M as 35W. The IGP is a HD4000 running at 650MHz. If the IGP is disabled/off, what does the TDP value fall to?

Thanks
 
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BSim500

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Apr 6, 2013
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Not sure about mobile procs, but the desktop i5-3350P (with iGPU disabled) has an 8w lower official TDP (69w) vs the 77w of other HD4000 desktop CPU's. For mobile chips, that might be a bit less.
 
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buai

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Aug 28, 2013
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11W seems likely. It's about half the TPD of a Radeon 7670M, and half the Radeon's performance.

I should have been more precise.
If an external GPU is present, the HD4000 can be disabled, and is not just at zero load. I suspect the TDP will then be less than 24W (=35-11).




 
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buai

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Aug 28, 2013
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After some more deep thought, and reading all replies ...

Power draw of the RAM must also be considered. A discrete GPU (eg 7670m) has its own 2GB of RAM, and this is included in the 25W TDP.

OTH, the HD4000 uses the system RAM, so you need to add a few more Watts to the 8W or 11W figures. The system RAM will use more power when the HD4000 uses it.
 
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