Thinkpads Forum

Posted: **Tue Feb 22, 2011 7:33 pm**

If I am not mistaken, there appears to be a few power states for the ATI graphics cards (or at least some of these graphics chips do). I was just wondering if anyone can verify that their GPUs are switching power modes depending on the system temperatures.

Here's a snippet of the MacBookPro1,1 GPU power states (listed under GPUThresholdDict:

Code: Select all

<dict>
	<key>MacBookPro1,1</key>
	<string>TA1</string>
	<key>TA1</key>
	<array>
		<dict>
			<key>high-threshold</key>
			<integer>22</integer>
			<key>low-threshold</key>
			<integer>0</integer>
		</dict>
		<dict>
			<key>high-threshold</key>
			<integer>30</integer>
			<key>low-threshold</key>
			<integer>23</integer>
		</dict>
		<dict>
			<key>high-threshold</key>
			<integer>90</integer>
			<key>low-threshold</key>
			<integer>31</integer>
		</dict>
		<dict>
			<key>high-threshold</key>
			<integer>100</integer>
			<key>low-threshold</key>
			<integer>91</integer>
		</dict>
	</array>
</dict>
</plist>

Posted: **Sat Feb 26, 2011 3:55 pm**

I don't think that works with older GPUs. At least I've never noticed it working with my V5200. In Windows you can enable PowerPlay (when working on battery), but don't think it's the same in OSX.

Posted: **Sat Feb 26, 2011 5:36 pm**

Hmm, that's too bad. Thanks for the info, though =)

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