New W701 review

from our friend's at notebookcheck:

Review Lenovo Thinkpad W701 Notebook - Notebookcheck Reviews

drake

 

Thanks.

It looks like it doesn't have new style keyboard and its heat sink is not copper.

Any comments on last one? I thought copper is a better choice for better cooling.

 

copper has a higher thermal conductivity for heat than aluminium, but if the aluminium fin is large enough, there should be no problem with cooling. Also, when choosing heatsink materials, consideration are given to rate of heat been produced from the source, and how fast the heat can be transferred to the air that is flowing across the heatsink. In large laptops with large fin surface, the bottleneck in the heat transfer is actually volume of air move across the heatsink fins, and how fast the airflow speed is. There is no point putting copper heatsink in there, unless you can benefit from them.

Laptop heatsink design is not like those in desktop computers, where you buy a 1 kg copper heatsink for future proofing your cooling needs. In laptop there is little future proofing, everything is designed with an exact need and spec in mind. l

R500 and R61 have aluminium heatsink, and arguably they run cooler than the T500 and T61 which have the copper heatsink.

 

Err, why do you care if its copper? The cooling system on W70x is very good (quiet and efficient), copper or now.
You can make pretty rubbish cooling system with copper too, and many laptops are example

 

Thanks lead_org, that's good to know.

Ingvar, it's more an observation than care. My gf has a T510 and it doesn't have copper heatsink, however as far I know W510 has copper, because it's more powerful machine(GPU at least) I would assume.

So, seeing that w701 doesn't have copper confused me a bit.

That's it. Thanks.

 

T510 doesn't need a copper heatsink, since there is lot of high performance parts in it, other than the Nvidia GPU and i7 dual core CPU, but they run much cooler than the quad core i7 and 880m Nvidia GPU in the W510.

on the W701 there is more than one fan from memory, and heatsink surface is quite large due to the larger chassis size, so there is adequate cooling going on with the aluminium heatsink fin setup. FYI W701 runs cooler than the W510.

 

OK, just looking through the vents on the left hand side and the rear of my T510 I see a copper heatsink. Perhaps I am seeing something else -- what am I seeing if not the heatsink?

 

So is your T510 come with i7 dual core and nvidia GPU or the intel gpu version?

 

Yes, mine is the i7 with nvidia GPU. That must be it. Discrete graphics' configs gets copper with integrated graphics does not?

 

maybe that is the case.

 

Have you observed W701 then? Because I did.

W701 has separate big fans and intakes for CPU and GPU. Using copper for them just will make laptop a lot heavier (remember, copper is a lot heavier than ALU).

 

Well, my observation was limited to heat sink and keyboard. I don't have one in front me so I can't have a closer look.