Can you please give me some advice about these video integrated graphics cards:
1. nVIDIA GeForce
2. Intel HD Graphics
Which one is better to use photoshop? Thank you in advance!
If you're looking to use Photoshop CS5, which has the ability to use the graphics card for some of its processing, then the latest drivers for the nVidia GT 320M (for Windows XP and up) enable the support for it in the card. I've had a hard time finding out if that is also true of the Intel HD.
So... If I had to pick, with all other things being equal, I'd go with the nVidia one. Now, I'm not sure if the two are otherwise equal (I didn't find English sites with detailed specs), so bear in mind that other factors may also play a role. Available RAM, number of cores, CPU speed, and a host of other factors do play into overall performance though you can ignore this if the two are quite close.
Final thought, the two previous postings have valid points. The notebook will give the horsepower you want, but the display will still be less than ideal for actual editing. You'll definitely want a good monitor when editing at home and you'll want to profile both.
Far more important is the actual display itself, and how the signal gets there. If you're serious about photographic editing, you should at least be using a colorimeter to get an accurate colour profile for your display; better still, you'd be using a wide-gamut display, something like the NEC MultiSync PA271W which has a good reputation.
The graphics card is not that important - but if you want, of course the nVidia will have better support/software then the Intel. (Though I don't know why Intel neglected the field.)
I won't check the Laptops, but look for dual core and a digital video out to connect to a proper high res and color stable monitor (LED lighting for semi-stable color, MVA/PVA/IPS-LCD-technology instead of TN) - as Rowland said, the monitor and how the signal gets there is much more important for good photo-work than the hardware in system. I'd guess the laptops have only a TN LCD display - colors will vary a lot with viewing angle, greyscale is not stable.