Latherial :
Ok thank you for that and i was also wondering is it usually a good idea to buy used gpu's
Used GPUs are perfect for use, but there are many many many scams out there, and I can't warn people enough.
Buy from a trusty source, (eg. your friend), the GPU is good as new.
Buy from a dodgy e-bay seller, you get a GPU that has artifacts or that has corrupted memory. Or you just get a GPU that breaks in a few days.