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Originally Posted by Koniakki
Care to explain your statement?
Taken from Jonnyguru. Unless this is not his PSU I don't understand why you are spreading such a wrong info.
That thing is pulling 90% Eff. at 40% Load.
Efficiency varies depending on the PSU. There is nothing wrong about my info at all. There IS such a thing as PSU overkill. If you are running your PSU at a very low load percentage, you are running at a much lower efficiency. When you're starting with a PSU that isn't Platinum rated like the AX1200i, it matters much more.
For example, this PSU varies by up to 15% when you run it at a 30% cold load.
One unit does not tell the story of all scenarios, and therefore a blanket statement cannot be made.
Regardless of whether he is only losing 3 to 4% efficiency by running it at 40% load, my argument still stands that as dies shrink and power consumption continues to decrease and performance per watt increases, 1200W PSUs will not be required to run high end rigs, so there is no 'future proofing' in that investment.
Like I said, if you plan on going Tri or Quad SLI within the next year or two, there's nothing wrong with it. But if you're going to run your CPU at stock with the stock cooler, and run SLI for the forseeable future, I see no reason to not save the $100 or so you could save by buying a more reasonable PSU, and investing that in a better CPU or better GPU, SSD, and so on.
That is my argument. To some people $$ is not a big factor. That's fine. To each their own. However, I absolutely was not spreading misinformation. PSU's vary wildly in efficiency depending on the PSU in question. The general rule of thumb is to buy a PSU that you will load to 50 to 60%. An SLI 780 Ti rig, as tested by Guru3D, pulls 617W from the wall, so roughly 520W from a gold rated PSU itself. Given the fact that his CPU is at stock and his cards are at stock (AFAIK), he would match those numbers. That is roughly 42% load on an AX1200i. Sure he's only losing a few percent of efficiency, but on another PSU it may be as much as 10% plus.
Either way, to each their own. I have no issue with it, but i have to disagree with you on the statement of my misinformation.
Perhaps I should've been more specific about the PSU in question. His PSU isn't affected as much by the load differential, and is already a Platinum Plus PSU, so the pocket cost difference isn't substantial at all.
K, end of this OT argument. Edited by HighTemplar - 11/17/13 at 9:09am