AMD A10 vs Intel i7 and GT650 vs HD7670

[TheMrPatrick]

Hi, I am looking for a laptop for use in college and for gaming. My budget is around €/$750. I think I have already sorted out the best laptops for this price, the biggest differences between the laptops are CPU and GPU.
Here are the combinations with the laptops:
Option 1.
Toshiba Satellite L855-124
Intel i7 with a Radeon HD7670M 1GB
http/tweakers.net/pricewatch/312582/toshiba-satellite-l855-124.html#tab:info

Option 2,
HP Pavilion g6 2051sd
AMD A10-4600M with a Radeon HD7670M (I assume also a 1GB version)
http/tweakers.net/pricewatch/315285/hp-pavilion-g6-2051sd-(b1l79ea).html#tab:info

Option 3,
Medion Akoya P6815
Intel i7 with a GT650M 2GB GDDR3
http/www.medion.com/nl/electronics/prod/MEDION%C2%AE+AKOYA%C2%AE+P6815+laptop/30013985A1?category=notebook_19&view=pictures

They are all pretty much the same price, which laptop would give the best gameperformance? And is there a big difference between a GT650M 2GB GDDR3 and a HD7670M 1GB? Because I am reading the GDDR5 version of the GT650M is much better but is it the same for the GDDR3 version.

 

[fpoon]

The 3rd choice would be the best.
Using this website as reference here, the GT 650M is way above the 7670M in power. It's just a GTX 660M downclocked a bit.

As for CPU choice, the i7 wins by a long way.