Hmm, please use one of the power calculators on-line to get a more accurate estimate of your current power usage.
You need to multiply this result by 1.3 to 1.5 (depending on the quality of your PSU) to get a "safe value" because PSU never deliver at 100%.
If the "safe value" that you get in the end is larger than 400 W, then there is a possibility that you do not have enough power.
You need to multiply this result by 1.3 to 1.5 (depending on the quality of your PSU) to get a "safe value" because PSU never deliver at 100%.
If the "safe value" that you get in the end is larger than 400 W, then there is a possibility that you do not have enough power.