- 70 months ago
So I'm trying to get my parts together and I was planning on getting the EVGA 850W 80+ Gold Certified Fully-Modular ATX Power Supply. I know that it has more wattage than I could ever need but it was the only one that I could find that was highly rated in efficiency, durability, and reliability (i.e. not smoking, "exploding", failing, etc.). My question is, if my to-be machine (hypothetically) only uses 500watts, will the PSU ONLY use 500watts, or will I always be using 850watts. I only ask this because I have concerns about the electric bill. Your input would be greatly appreciated.