My current 650W PSU is dying on me so I'm after a new one (it's going to be a be quiet dark power pro 11, i'm certain on that...)
Anyways, it's running a 5820K OC'd to 4ghz/1.3V and currently an old low power GPU that needs replacing too.
So basically even if I get a GTX 1080 and OC it to 2ghz along with the multple SSDs and HDDs in the system and...about 6 fans, my gut is screaming at me that 650W again will be enough but the cautious side of me is wondering if it's better to go for a 750W just to be on the safe side...
I've had a look at PSU calculators like outervision which put me very close to the limit but...I added my optical drive to that which won't be running all the time (if much at all) so removing that knocks 30W off the usage straight away.
So yeah system specs in full are...
5820K @ 4ghz/1.3V
4x8GB DDR4 @ 1.2V
(potential) GTX 1080 @ 2ghz (i might go for a 1070 yet i don't know, waiting to see how vega affects nvidia pricing).
6x140mm fans
PCI-E sound card
USB DAC
2x SATA SSD's
1x M.2 SSD
1x HDD
1x Optical drive
at least 8 USB devices (including 2 keyboards and 2 mice...don't ask)
So should I stick with my gut feeling that 650W should be enough or should I show an abundance of caution for both current and future plans and get the 750W?
All of the so called PSU calculators are overstating their numbers by at least 28% if not more and thats to cover their own butts
Power draws for systems with a single video card are 350 watts at the most and often much less
You could get away with a little as a 400 watt PSU but if you want more headroom a 550 watt is more then enough
Unless you are going to BIOS volt mod your video card have an SLI setup or play around with LN2 cooling you dont need a 650 or a 750 watt PSU
As for the Be Quiet Dark Power Pro 11 its somewhat overpriced and the EVGA SuperNova G2 and G3 are cheaper in most places.
I don't have a ton of time to calculate the perfs in this system but will try and update when I get free. However regarding the GPU see the article below.
according to the article the max wattage from the 1080 never went above 224W however I think with overclocking this number could raise. So from an overhead perspective I would allocate at least 250-300W for the gpu's.
All of the so called PSU calculators are overstating their numbers by at least 28% if not more and thats to cover their own butts
Power draws for systems with a single video card are 350 watts at the most and often much less
You could get away with a little as a 400 watt PSU but if you want more headroom a 550 watt is more then enough
Unless you are going to BIOS volt mod your video card have an SLI setup or play around with LN2 cooling you dont need a 650 or a 750 watt PSU
As for the Be Quiet Dark Power Pro 11 its somewhat overpriced and the EVGA SuperNova G2 and G3 are cheaper in most places.
400W? ehh...that sounds awfully low...I mean I've tried googling around for something that shows power draw from the wall but I haven't found much with regards to that
I know that the be quiet's are a little on the pricey side but...I just like be quiet gear, nothing more than that
(And I'd quite like a multi rail setup to be honest)
I said you could get away with as little as 400 watts not that you should get a 400 watt
Two reasons for that first 550 watts gives you more headroom and second almost all units below 550 watts are way overpriced
Most think and assumes their hardware draws far more power then it actually does
You can get a really high end system with a high end video card a full liquid cooling setup with a bunch of fans pumps and HDD´s and that system would draw about 350 watts
Most systems draws much less then that and are actually closer to 250 watts at full load
So no you dont need a 650 or a 750 watt PSU for a system with a single video card in it unless you are going to add more video cards or playing around with extreme cooling
You can get a 650 watt if you want and makes you feel better but there is really no reason to do so
Forget all of those so called online calculators they are all wrong and total rubbish as they overstate power draws by at least 28% if not more
They do that for two reasons and the first one is to cover their own butts in case you have an el cheapo PSU that cant do anywhere near its rated wattage and blows up
The second reason they overstate power draws is because they can sell you a bigger PSU and make more money
Also note that power draws from the wall is not what the systems uses as you have to take the rate efficiency of the PSU off the number you get from the wall/UPS.
Edit: 400 watts from the wall with a gold rated PSU is 360 watts used by the system just to make an example
The could get away with as little as 400W is still kinda...well doesn't make much sense
I mean as haswell-e CPU can use 180-200 overclocked easily and an overclocked GTX1080 can use up to 216W and there goes that 400W figure just on those 2 components
I know the likelihood of fully maxing out both the CPU and GPU at the same time is low but isn't it about making sure there's adequate power available for all components rather than probably peak load?
Buying power supplies really is the thing I hate most in computing, in the last 16 years I've only bought 3
(An enermax Libtery 500W (back when enermax was literally the only choice for a quality PSU), an Enermax Liberty Eco 620W and my current 650W)...it's something I very much try and avoid!
I got to this thread late; I would have suggested to get a watt meter (Kill-A-Watt or equivalent), plug it in, play a game, and look at the power draw. Add a fudge factor, ur done.
Seconded. Same Super Flower OEM afaik too. Sleeved kits available directly from EVGA. I love Be Quiet but there stuff is a bit pricey and there usually is another option that is just as good but a bit cheaper.
Those are the old Capstone which are no longer made and sold as they have been replaced by a new Capstone no longer made by Super Flower which are also worse
So unless you can get your hands on one of the old ones dont bother with the Rosewill Capstone.
I got to this thread late; I would have suggested to get a watt meter (Kill-A-Watt or equivalent), plug it in, play a game, and look at the power draw. Add a fudge factor, ur done.
Haven't managed to get one yet, got side tracked with other things
A watt meter wouldn't really help as I'm getting the PSU with an eye for things that will be changed/added in the next few months so my currently system isn't really indicative of the finished build :|
Quote:
Originally Posted by Thoth420
Seconded. Same Super Flower OEM afaik too. Sleeved kits available directly from EVGA. I love Be Quiet but there stuff is a bit pricey and there usually is another option that is just as good but a bit cheaper.
I'd agree you'll be fine with a 650W. I recommend to get a 750W only if you're willing to spend the extra $$$ for an equivalent make/model to the 650W you have in mind (i.e., from a Seasonic G-650 to a G-750, for example).
Multi rail is a long standing personal preference, nothing more than that
Everybody has them
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