Basically i have had to rma my current power supply which is a evga 650w g2 gold it is coming back with my replacement on Wednesday next week, i was wondering i have a msi gtx 970, i do have a spare 500w xigamatic unmodular which was my old psu before i got this card would this be suitable for a week while i wait for my replacement im only asking as i know the recommended wattage for the graphics card is 500w and im not sure if i will need to be a bit above that to run this card what do you guys think is it a risk to use my spare psu or will it be alight for a week