Core i3/i5/i7 integrated graphics and graphics cards?

If you are talking about a PC, then it can have either integrated graphics, or a separate graphics card, or both.

If it has both, how it works is that you'll have ports for either one and you choose what you want to plug your monitor into. Otherwise, if it has one or the other, you'll just have the ports for whichever is available.

For laptops, they will always only have one monitor input. So if you get a laptop that has a special nvidia or amd card, then that card replaces whatever would be standard for the laptop. It works differently in laptops, and basically "integrates" these 3rd party graphic cards into the laptop. You can't remove them or anything like a PC can have done.

The motherboard of a PC determines if you'll have integrated graphics because it is based on the CPU chip set (embedded on the motherboard) not the actual CPU processor.

What you may be seeing are notebooks/laptops that support hybrid graphics. This capability allows you use the lower powered integrated video adapter to conserve power and heat when you don't need the more capable discrete or dedicated GPU. Not all laptops/notebooks support this function.

Good luck!

Except in the case of the i3, where the "video card" indeed is in the CPU, however, it does need a motherboard supporting the CPU to use the display.

The same holds true for the new Sandy Bridge processors, where the is a "video card" in the CPU.

True, Sandy Bridge (Gen 2 of the i processors) has the integrated graphics built into the chip. So it is the chip set (motherboard) that determines if you will utilize that feature or not.

Thanks for all answers. I am thinking primarily of laptops. There is a table on the following wikipedia page suggesting that all i3 laptops would contain the Arrandale version...
http://en.wikipedia.org/wiki/Intel_Core#Core_i3
And on the following page it says "Arrandale already contains the major north bridge components, which are ... integrated graphics..."
http://en.wikipedia.org/wiki/Arrandale_%28microprocesso...
- Doesn't this mean that the graphics are built onto the chip already on Arrandale i3?
- I wonder how a hybrid system decides when it needs to switch between i3 integrated and nvidia - would it be down to specific graphics commands, temperature or what?

"Arrandale is the successor of the 45 nm Core microarchitecture based Penryn processor that is used in the many mobile Intel Core 2, Celeron and Pentium Dual-Core processors. While Penryn typically used both a north bridge and a south bridge, Arrandale already contains the major north bridge components, which are the memory controller, PCI Express for external graphics, integrated graphics and the DMI connector, making it possible to build more compact systems without a separate northbridge or discrete graphics as Lynnfield. The Arrandale processor package contains two dies, the actual 32 nm processor with the I/O connections and the 45 nm graphics controller with the memory interface."