Well.

You can buy an EVGA GTX 580 3GB for 500$ and after selling your current VGA you maybe can buy another 4 GB ram(If your mainboard still have slots for extra memory) so next year you have to think about upgrading your CPU as it's not very good.

But you have to be sure if your power(PSU) is enough for GTX 580.

If it's not enough you have to buy a PSU instead of buying extra ram.

And if you don't need high resolution you can buy old 1.5 GB of GTX 580 because it's cheaper and it's really good for resolutions smaller than Full HD.

Well,

Actually I don't want to make a whole new topic and because I am going to buy a new PC I will ask my question here.

First this is my specs:

VGA:GTX 580

Ram:8GB ram 1600 dual channel(2x4GB)

CPU:I7-2600K

CPU Cooler:Thermal take SpinQ

Case:Green Falcon

Here is the image of my case:

And here is my question:

As I wanna buy a GTX 580 and it is from NVidia I want to buy a Mother board which uses 100% of the power of my NVidia's VGA.

First I wanted to buy an Asus p8p67 but someone told me that MB can't uses 100% of the power of NVidia's cards.

Is that right?

And he told me to buy a p8z68-V for better performance.

If this is right I have to pay a little more to buy p8z68-V so what should I do?

What do you think about this?