j'ai reçu une réponse de gigabyte
Dear jérémy
Thank you for kindly mail and inquiry. For GV-N560OC-1GI, power requirement is 500W (with two 6-pin external power connectors). ODIN Plus 700w can support this Graphic card. About the compatibility issue you mentioned, we haven't get similar problem before.
We are sorry to hear that problem with your product, we suggest you remove graphic card and test your power supply unit with your motherboard to see if your PSU works. If not, please test it with another PC to verify problem.
If your PSU can’t works with any PC, it is possible a hardware problem with it and a further examination will be need. Please contact your supplier(where you bought your product) for further assistance.
Ca veux dire quoi en gros?