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ThinkPad NotebooksThinkPad: T400 / T500 and newer T series Laptops
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Average power consumption comparision: i7 and t500

2009-09-28, 21:49 PM



What is the average power consumption (non-peak) of a t500 system,

doing web-surfing and light tasks ?

I have read that the i7 mobiles (non-lenovo) are at 52W avg, and 75W peak,

and this will help me decide whether to buy the t500 or wait for the lenovo

i7 based laptops




151 Posts


Munich, Germany

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Re: Average power consumption comparision: i7 and t500

2009-09-28, 23:44 PM

P8400 / P8600 etc core2duo mobile (2,2-2,4ghz) take 25W. I think in office use my T400 uses about 15W, not sure. It depends on load. I find quad core laptop CPUs quite useless for the average user.I think the i7 mobiles have a 45W specification, which is quite higher than the modern dual cores.  I prefer longer battery life to having four cores i will most likely never use in daily work. This changes, of course, if you use your laptop as Desktop replacement or primarily for CPU intensive tasks, such as video en/decoding.

Thinkpad T400 (Windows 7 Ultimate x64)

102 Posts


Mankato, MN

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Re: Average power consumption comparision: i7 and t500

2009-09-29, 2:06 AM

Thinkpad's with LED screens idle at around 7-8 watts. I think on average Thinkpad T500's will be around 10-15 watts depending on Wifi use (wifi being one of the more power demand)


21115 Posts


Australia, Melbourne

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Re: Average power consumption comparision: i7 and t500

2009-09-29, 13:02 PM

older T7xxx CPU have a TDP of around 45 watt, the T8xxx Penryn should have a TDP of 25 watt which makes it run mucher cooler and therefore less battery power for operating the CPU cycles and the heatsink fan. 


Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft
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