Help Needed in Choosing CPU

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gaugeta123

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I'm planning to purchase a W530 system and before placing the order for the same I wanted to clarify one doubt regarding the processor.

Currently I've opted for the Intel® Core™ i7-3820QM (2.70 GHz, 8MB L3, 1333MHz FSB) processor.

I see that there is another choice for the processor i.e. Intel® Core™ i7-3920XM (2.90 GHz, 8MB L3, 1600MHz FSB).

I was wondering if choosing the 3920XM would be an overkill and ending up overheating the laptop.

Here the 3920XM processor needs 44.69W whereas 3820QM needs 41W, so does that mean processor which uses less power will run cooler or is the temperature of the processor not dependent on the power consumption.

Can anyone clarify the same and point out if there is any downside of choosing the 3920XM over 3820QM like overheating issues etc.

I'm mostly concerned about overheating.
 
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InvalidError

In theory, yes. In practice, the difference should not be particularly noticeable unless you stick a thermometer in there.

Also, TDPs are usually worst-case theoretical figures that you will rarely see under normal circumstances in practice.

As digit said, if the extra few theoretical watts bother you, get the QM and call it a day. You will be doing your bank account a small favor in the process.
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Zircoben

Zircoben

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They both are excellent CPUs, and don't worry about overheating. If an OEM has it listed to be put into a laptop, it has been made to work correctly for the laptop.

It will run hotter, but really, the laptop can handle it and you have no need to worry about it.

The price difference is really all you should worry about. The i7-3920XM is about 10% faster.

Hope that helps :)
 
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gaugeta123

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Thanks for replying.

But is the power consumption directly related to power consumption, is that thinking right.

And is there any way I can get to know the idle temps for these processors from any source.
 
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digitaldoc

digitaldoc

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There should be no difference that you can notice on the overheating. They are very close processors, and in practical usage you will not notice any difference without any benchmarking software, and even than would be quite close.

That being said, for the same price, the 3920XM has a slightly faster clock speed of 2.9 vs the 3820QM at 2.7 GHz, so I would take the faster one. I just would not pay more than a few bucks premium for it.
 
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Toshz

Toshz

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Here, look at this:

http://www.notebookcheck.net/Intel-Core-i7-3920XM-Notebook-Processor.73466.0.html

This one is the 3820QM review:

http://www.notebookcheck.net/Intel-Core-i7-3820QM-Notebook-Processor.73456.0.html
 
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gaugeta123

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@all : Thanks a lot for replying.

The temps I mentioned for 3920XM where typical power consumption would be 45W but the max TDP would be 55W and for 3820QM typical usage is 41W whereas max TDP is 45W.

With this info will the processor with higher TDP will likely run hotter at least in theory.
 
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InvalidError

InvalidError

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In theory, yes. In practice, the difference should not be particularly noticeable unless you stick a thermometer in there.

Also, TDPs are usually worst-case theoretical figures that you will rarely see under normal circumstances in practice.

As digit said, if the extra few theoretical watts bother you, get the QM and call it a day. You will be doing your bank account a small favor in the process.
 
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