What would happen if your PSU can't cope with the load:
•bad 3D performance
•spontaneous reset or imminent shutdown of the PC
•freezing during gameplay
•PSU overload can cause it to break down
Sorry to say your PSU is not a trusted one, so replace it ASAP, to protect your components. Its a Tier 5 PSU. Not Recommend for stressful situations. May not be able to put out full rated power above room temperature, and may slightly fail to meet ATX specs.