NVidia 640M LE - Two versions? Hlp needed!

[Ericane]

Hey everyone!

I have googled so much that I got a headache. That is why I am asking you guys!
I was about to buy a laptop with "nVidia 640M LE 2GB" GPU, when I noticed that there is both a Kepler and a Fermi version of the card.
I emailed the customer support and asked which model it is, and I will get an anser within 24h.

So my question here is: Which one is better?

I have checed some revievs, but I cant figure out which one is better.

Here is one site I managed to google:
http://www.anandtech.com/show/5697/nvidias-geforce-600m-series-keplers-and-fermis-and-die-shrinks-oh-my/2

And here is the laptop (You guys can use google translate if you find the language funny):
http://cdon.fi/kotielektroniikka/fujitsu_lifebook_nh532_intel_i7-3630qm_8gb_500gb_17.3_w8-21464861

 

[Pepto]

You want kepler, as it is not only more power efficient, it also produces less heat

 

[Ericane]

Thank you for your anser, that is what I tought from the beggining!
The only thing that made me unsure is the Memory Bandwidth;

Kepler:
Up to 28.8GB/s
Fermi:
Up to 50.2GB/s

But is it that way that the Memory Bandwidth doesnt make that much difference? Because fermi has like 50% more..

 

[Pepto]

Thank you for your anser, that is what I tought from the beggining!
The only thing that made me unsure is the Memory Bandwidth;

Kepler:
Up to 28.8GB/s
Fermi:
Up to 50.2GB/s

But is it that way that the Memory Bandwidth doesnt make that much difference? Because fermi has like 50% more..

memory bandwidth isn't so important for laptops, but in general, the more bandwidth that you have then the better it will handle higher resolutions and AA. but the card could have other limitations before that makes much difference. If both cards have the same specs other than memory bandwidth, go with fermi.