Re: I either need a new ram stick, or video card
Does the motherboard have a speaker on it? If you boot up the PC without the memory you should get the error beeps (the codes is dependent on the brand).
One beep means all system ok and more than one beeps indicates errors.
Does the motherboard have an onboard video port? You can try that if possible, otherwise get another video card to try out.
I yam what I yam