Upgrading Graphics & RAM

[HUNGRYBOY40]

So i've got a somewhat old desktop that i'm thinking of upgrading, I'm planning on upgrading the RAM and the Graphics.
RAM is no problem, I've picked out some RAM sticks, my motherboard supports DDR3. The next thing I'm planning on upgrading is the Graphics Card, and that is where my question is: most Graphics Cards I've found support GDDR5 so I'm wondering will there be any issues or will it work if I have DDR3 RAM installed, and how will I know it is compatible with my CPU and Motherboard?

[camerongray]

The standard of RAM on the video card doesn't need to match the motherboard, you can safely use a GDDR5 GPU with a DDR3 motherboard assuming that everything else is compatible (suitable slots available and sufficient headroom on the PSU to power the new card).

[patio]

You may wanna post the current system specs and info so we can advise if it's a wate of money...or not.