Published on 21st January 2014 by
Originally Posted by Gareth HalfacreeTwo hours a day? Wish I only spent that long in front of a screen!
Originally Posted by ShirtyBut my point was that even if I spent 16 hours gaming a day on my rig, 365 days a year, my ultra premium Enermax PSU would still not have recouped its additional upfront cost until the warranty had expired.
Originally Posted by ShirtyI suspect I am in the majority,
Originally Posted by Shirtyalthough I concede that a lot of users (even casual or non-gamers) don't shut down their PC when they're not using it. Baffles me.
Originally Posted by Gareth HalfacreeQuote:Originally Posted by CombatusWith PSU's, unless you're going for a setup with two high-end graphics cards then you really don't need a PSU with more than 450W on tap. Even the power-hungry R9 290X drew 426W gaming at 2,560 x 1,600 - admittedly this is quite close for comfort but the £500/$700 780 Ti's total system draw of 402W still leaves you with over 11 per cent headroom.Remember, though, that a given PSU is at its most efficient when running at 50 per cent load; running closer to 90 per cent will mean it's less efficient. The 80 PLUS Titanium rating, for example, requires 96 per cent efficiency at 50 per cent load but drops to 91 per cent efficiency at 100 per cent load. Sure, 5% of a 450W PSU is 22.5W - but that's still 197.1KWh a year that you could be not burning, a saving of £30 at the Energy Saving Trust's stated average electricity tariff, assuming 24/7 use.
Originally Posted by CombatusWith PSU's, unless you're going for a setup with two high-end graphics cards then you really don't need a PSU with more than 450W on tap. Even the power-hungry R9 290X drew 426W gaming at 2,560 x 1,600 - admittedly this is quite close for comfort but the £500/$700 780 Ti's total system draw of 402W still leaves you with over 11 per cent headroom.
Originally Posted by CombatusThat's also assuming you're gaming 24/7/365, which I'm sure will mean you don't live till the end of the year anyway ;) What I mean is that the peak loads are only likely to be seen during demanding games at high resolutions and only with a select few monster graphics cards so yeah, while you do that then you might be paying more in power bills.
Originally Posted by leslieEven if by some miracle you actually do recover the expense of a new PSU in 2-3 years (pretty much impossible),
Originally Posted by leslieyou still lose from an environmental standpoint as it takes more energy and pollution to make it, than it will save over it's lifetime. If you are buying one, yes, look for a more efficient one, but don't go buy one because you think it will save you money or help the environment.
Originally Posted by Gareth HalfacreeI'd be interested to see your analysis of the error in my calculation, 'cos I believe I've proven otherwise.
Originally Posted by leslieHonestly, how many people do you know who game 8 hours every day?
Originally Posted by leslie
There is also another problem with your idea, gaming does not equal full load. Yes, you can load the CPU, or the GPU, but most things do not load both, much less the drives as well.
Originally Posted by leslieI will concede though, that how expensive the PSU is and power costs also plays a major factor. If you are talking a $50 power supply in a country that pays a lot for power, yes, you probably could recover that. However, considering the nature of this site, I doubt many here are using a $50 power supply in their gaming machine.
Originally Posted by leslieThat still doesn't clear you of the environmental aspect.
Originally Posted by leslieThe only way this really works in your favor, is people doing Bit Mining and such, where the system is constantly pulling as much as possible. And don't get me started on that as most are a waste of money as well.
Originally Posted by Kamakazie!Gareth, interesting point but you seem to have ignored any non load use cases for the PC.
Originally Posted by Kamakazie!
Without looking at numbers but based on your statement of highest efficiency at 50%, you should add in a few hours use at near idle levels (Web browsing) whet the 450w PSU might be around 35% like load but the 900w down in the 15% range. Low load use cases will make up quite a large amount of time for many! If you added 2hrs of low load to the pro gamer, would there still be a saving?
Originally Posted by Otis1337Who is letting Gareth have caffeine?
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