Using PSU at 100%

Toggle sidebar Toggle sidebar
H

heydan

Distinguished
Jul 24, 2009
97
0
18,630
Hi guys, I want to ask you, if someone know what happen if you use the 100% of your PSU, I´ve just build a pc at pc part picker with some hardware that I already have and other that I want to get (like the GPUs, its an example because maybe I´ll wait for the R9 200 series) this is the result: http://pcpartpicker.com/p/1NCKs
as you can see it reach the 860wts that the PSU support, do you think that it could be something wrong whit this?
 
Solution
O
Go for an AX1200i or something because the PSU May be advertised at 860w it isnt. Out of that PSU you will probably only get 800 watts at max and in the future if you plan to do any overclocking your system will crash. Also on PCPartPicker its only an estimate so i recommmend goin for a higher wattage PSU just incase and if you do go with the AX860i your system will most likely be unstable and crash alot

Hope This Helps,
OlittoTV
Sort by date Sort by votes
Go for an AX1200i or something because the PSU May be advertised at 860w it isnt. Out of that PSU you will probably only get 800 watts at max and in the future if you plan to do any overclocking your system will crash. Also on PCPartPicker its only an estimate so i recommmend goin for a higher wattage PSU just incase and if you do go with the AX860i your system will most likely be unstable and crash alot

Hope This Helps,
OlittoTV
 
Upvote 0 Downvote
Solution
Well, using the PSU at 100% of rated output will most likely decrease the lifespan of the PSU and at the very least cause much more wear and tear than usual (say 80% of output and lower). Also, your PSU, if it is operating at 80% efficiency (and in the right temperature range), it will draw 1075W from the wall. In all likelihood, your psu won't even be able to output 860W and you'll bluescreen or have random shutdowns (which are bad).

I strongly recommend getting something at least 1000W or 1050W at 80 Plus Bronze.
 
Upvote 0 Downvote


Completely incorrect. The Flextronics made Corsair AXi series are top of the line and every bit as good as the Seasonic X/Platinum line. That power supply can easily supply 1000 watts or more.

You are in no way stressing that power supply with the build you listed. PCPartpicker overstates how much power you will actually need because they have to assume you are buying a junk power supply. 2 x HD 7970s only need a recommended 800 watts.

http://www.realhardtechx.com/index_archivos/Page362.htm

In short that PSU is not only fine it's a bit more than you actually need. It is an excellent choice. You will not be using anywhere near 100% of it. Any recommendations leave 200-250 watts headroom. That system will use less than 600 watts at the wall.
 
Upvote 0 Downvote
You can also do better on RAM. Haswell like higher speeds than DDR3 1600. Here, for the same price is some very good DDR3 2133.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231571&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

It's also only 2 sticks so you can upgrade to more in the future if necessary.
 
Upvote 0 Downvote
granted, i'm not an overclocker, i'm not even a gamer at the moment, but still, experiences i've gathered from the last decade and more of building systems and reading sites like this one tell me most builders overestimate their need for wattage. of course it always depends on what your PSU can stabily deliver on the different rails, but quickly adding up your components i'm not even reaching the specified 860 watts of your listed psu.

so as long as you will drive cpu and gpus on stock speeds you should be fine with your choices. also you got a relatively quality PSU, not some POS-china-cracker, so you can expect it to deliver said wattage for a couple years at least. also keep in mind that even driving a 4k display, your components won't always draw their specified TDP from the PSU, which is derived from burn ins and high-power benchmarks most of the time, so going with a 1200w PSU you'll not even use 50% of most of the time seems like overkill to me.

if you plan to overclock considerably on the other hand, it's always good to have some headroom, but then a 1000w-PSU would also suffice for most people..

also, why do you need such a boatload of fans??

cheers
 
Upvote 0 Downvote
Why do people say power supplies will not put out the rated wattage. This unit should.

The real question about how good is it for the unit. Well its not great, but it IS designed to run full load upto 50c ambient temperatures if needed.

Also according to techpowerup this thing gets over 88% efficiency at low wattage and just a little more it gets into the 90's. Not that efficiency has ANYTHING to do with stability or ability to deliver power. it is ALL about wasted power in the form of heat(it uses more power).

JonnyGuru also rates this unit well.
 
Upvote 0 Downvote
Anort3 is correct, you don't have to worry about running your PSU at 100% because you'll never even get to 75%. I have a very similar setup, and heavily overclocked (2500k @ 4.8GHz/1.37v, CF 7970s @ 1150/1575) it pulls 720w from the wall, meaning I have ~250w DC headroom with my TX850. Of course, the AX860i is in a class of its own, making it an ever better/safer option.
 
Upvote 0 Downvote


Guru3d load tested the AXi 860 with 2 x GTX 590s, that is the same as 4 x GTX 580s! it pulled 728 watts from the wall. The 7970 uses less power than the GTX 580.

http://www.guru3d.com/articles_pages/corsair_ax860i_psu_review,8.html

9.7/10 from jonnyguru.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=317
 
Upvote 0 Downvote
Yes i know that Source- http://www.guru3d.com/article/amd-radeon-hd-7970-review/8 Quote:
Our test system is based on a power hungry Core i7 965 / X58 system. This setup is overclocked to 3.75 GHz. Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). On average we are using roughly 50 to 100 Watts more than a standard PC due to higher CPU clock settings, water-cooling, additional cold cathode lights etc.

We'll be calculating the GPU power consumption here, not the total PC power consumption.

Measured power consumption

System in IDLE = 163W
System Wattage with GPU in FULL Stress = 355W

 
Upvote 0 Downvote


The card in that Guru3D.com review is the original AMD Reference Design Radeon HD 7970 with a core clock of 925 MHz.

The AMD Reference Design Radeon HD 7970 GHz Edition can draw almost 50 Watts more during gaming than the older version of the card.

TechPowerUp.com's measured powered consumption of the graphics card only via the PCI-Express power connector(s) and PCI-Express bus slot:

power_peak.gif
 
Upvote 0 Downvote
Well the truth is that Im a little confuse here, I think that both suggestion are logical (get the 860 or higher) so Im still confuse and I dont know what to do, maybe ill wait for the R9 290X and see what this card can do... if I get the AX1200i using this 860 w shown in the PC part picker do you think would be a waste? thinking that maybe in the future getting the R9 290X?
 
Upvote 0 Downvote
Well guys, base on this page: http://www.realhardtechx.com/index_archivos/Page362.htm, and considering that I´ll be wating for the R9 290x, the page show that the R9 280x CF requires 900w, so here there´s just to options, the less likely is that the R9 290x would be the same like the R9 280x (which anyway I'm overstepping the 860w) and the more logical option is that the R9 290x CF would be a little more than that, so base on this, I´ll go for the AX1200i, well I´ll need to save a little more money but I think is the best option, if you don´t think the same, please let me know while I save money (mid november) thanks for everyone!
 
Upvote 0 Downvote
Let me serch for it, I live in Mexico and there´s not a lot of retails here, and sometimes you dont find what you´re looking for, ordening for US is more expensive that buying here, and famous page like newegg well they aren´t international, thanks!!
 
Upvote 0 Downvote
Yeah the 290X turned out to be an amazingly powerful card and released at a great price but it's a power hog!
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom