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I currently have an i5-2410m in my laptop with a 35W TDP and am upgrading to a i7-2630qm with a 45W TDP. How much will this affect the battery life of my computer?

asked Jan 04 '13 at 23:47

nb44wwrc's gravatar image


Aren't most CPUs soldered in to the motherboard? How are you replacing the CPU?

(Jan 04 '13 at 23:59) TheTechDude TheTechDude's gravatar image

Actually it's not. I hear that a lot and that's what I previously thought as well but most laptops have actual sockets in their mobo and thus the processors are replaceable.

(Jan 05 '13 at 00:07) nb44wwrc nb44wwrc's gravatar image

you will have to take the laptop apart to find out if the CPU can be replaced.

Also understand that some laptops use custom cooling designed for the the CPU TDP and upgrading it may cause the system to overheat.

PS many laptops also have custom bios where they specifically avoid supporting certain CPU's to prevent people from upgrading.

it is also hard to find mobile CPU's because they are not sold retail.

I recommend not doing it even if the CPU uses a socket connector unless there is a really good return policy on the CPU. There is just too much that can go wrong with this since nothing is really standardized.

answered Jan 05 '13 at 00:06

Razor512's gravatar image


1) Your comment does not answer the question

2) My laptop has an actual socket and my mobo supports 35 and 45W TDP. The processor is listed in the service manual for my PC and I have found a place to purchase a processor.

(Jan 05 '13 at 00:10) nb44wwrc nb44wwrc's gravatar image

you will need to list your battery life before we can give you an answer on the change. Also for the measurement to be accurate, you will need to run your battery down at full CPU load and measure the time.

A core i5 and an i7 use around the same amount of power under light loads and do not really hit their full power until the CPU is maxed out.

and as I have said before, you need to find more info on the laptop it's self to see which models have the core i7 CPU. If you see changes such as the laptop being a little wider or thicker when the core i7 is in place then that means that the core i7 system requires additional cooling.

it does not matter what TDP the motherboard supports if the heatsink is not designed for a higher TDP CPU.

With the info you have provided now, the most we can tell you is that you will have less battery power with the core i7, but we cannot tell you how much less because that will be a measurement of time and that is relative. and only accurate at full load. the loads in between cannot be accounted for easily unless you find a way to log the power usage over time and use it normally.

(Jan 05 '13 at 02:39) Razor512 Razor512's gravatar image

hard to say, depends on your power configurations, your battery size, your usage, and many other factors

i dont think anyone here could give you a realistic answer...

answered Jan 05 '13 at 00:58

trueb's gravatar image


I'm mainly wondering if I'd even see a difference

(Jan 05 '13 at 01:27) nb44wwrc nb44wwrc's gravatar image

not a significant one

(Jan 05 '13 at 08:34) trueb trueb's gravatar image

On an unload scenario I think the time will be the same. In a fully load scenario, is very hard to tell, check what is the current consumption of your machine, if is 100W the battery will last at least 10% less, 4 hrs -> 3,6 hrs (but this is a very raw calculation)

answered Jan 05 '13 at 21:08

Erwin%20Ried's gravatar image

Erwin Ried

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Asked: Jan 04 '13 at 23:47

Seen: 789 times

Last updated: Jan 05 '13 at 21:08