Guys chill. Just answer his fookin question. Is he good with an 825? Or should he jump up to the 1k just to play it safe? I personally think he should jump up to 1k.

DeludedRaven
Guys chill. Just answer his fookin question. Is he good with an 825? Or should he jump up to the 1k just to play it safe? I personally think he should jump up to 1k.

he is fine with an  850 watt psu if its a very high quality unit. 

As they say, don't fix it unless it's broken. I kind of doubt the 850W would fail, but it's definitely possible and if it does, then you can fix it. I doubt if it did fail that it would be violent and you would likely just come home one day and it might just kind of not start up.

trek554

RainStryke

trek554

RainStryke

trek554

RainStryke

trek554

RainStryke
You could power that system with a solid 650w PSU. The GTX 980Ti doesn't use up that much power.
 
Review:
http://www.guru3d.com/articles-pages/nvidia-geforce-gtx-980-ti-review,8.html
 
The 850w is almost enough for tri SLI GTX 980Ti's.

um that is for the cards only in that chart. you would be a damn fool trying to run 980 TI sli with a 650 watt psu. two oced 980 Ti cards alone can pull over 550 watts. throw in an oced cpu and the rest of components and even a 750 watt psu would get close to tapped out. 

You can talk about theory's all day. If you want to recommend people get a 1600w PSU to be ready for overclocking and having 20 hard drives, go ahead. But it's ridiculous, that reviewer uses a i7 5960X which uses 1.375v-1.425v to get his operating speed. That's twice the amount of power of a i7 4770K. He could easily get away with a gold/platinum certified 650w PSU on a GTX 980Ti set-up.

perhaps you should learn how to read a little closer. the cpu used in that review is irrelevant and had nothing to do with what I said. that chart is only showing power consumption for the cards.
 
its a FACT that an oced 980 ti can use 275 watts so its simple math to say 550 watts is very possible for two of them if under full load. an oced 4770k can easily use 100 watts or more. that is potentially 650 REAL watts or more right there for oced 980 ti SLI and oced 4770k and I did not even factor in the rest of the components. so NO, a 650 watt psu is NOT enough for an oced 980 ti SLI system. 

Talking about reading a little closer. I never said anything about overclocking in my original post. Yeah... 650w is enough unless you want to overclock.

nice try but you are the one that quoted and replied to me when I have said overclocking right from the beginning. and even at stock speeds a 650 watt PSU is going to be pushed to over 90-95% at times. in fact is someone was silly enough to do a full system bench it would easily exceed 650 watts.  

Hmm... post #8 is my OP that you quoted. You took my post out of context, started speaking about overclocking and saying I needed to learn how to read. I mentioned your theorizing as a point of taking my post out of context.

are we going to do this forever. I only quoted you to say that was only the power consumption of the cards. nearly anyone with a 4770k and gtx 980 ti will be overclocking so I mentioned that. 
 
you then bizarrely quote me and talk about the cpu in that review which again is irrelevant as I just told you those power consumption numbers were for cards only. and then you go on to say a 650 watt psu is sufficient when in fact its really not especially if overclocking.  

The OP isn't running dual power supplies or a dedicated power supply for the video card, so it's not bizarre to talk about the system as a whole and it's not irrelevant information because it wasn't just for the cards only.
 
In the Guru3D link I posted it shows the full system usage under a realistic stress test.
 

1. System in IDLE = 92 Watts
2. System Wattage with GPU in FULL Stress = 332 Watts
3. Difference (GPU load) = 240 Watts
4. Add average IDLE wattage ~10 Watts
5. Subjective obtained GPU power consumption = ~ 250 Watts

 
http://www.guru3d.com/art...x-980-ti-review,8.html
 
They show the specifications of the system they are using:
http://www.guru3d.com/art..._980_ti_review,12.html
 
Add 250w to that system wattage at full stress and you've got 582w on a X99 system that uses a i7 5960X which has twice as many cores as a i7 4770K and uses twice as much power. So, on a i7 4770K or even a i7 4790K system while playing the latest DX11 games you are looking at a full system load of around 480w load.
 
Techpowerup mentions a possible power usage of 277w when running a benchmark test on FurMark
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_980_Ti/29.html
 
Then they mention that in game power usage is at 211w from the graphics card alone while playing Metro 2033: Last Light.
 
Personally, I ran a Corsair HX750 with a pair of R9 290X's that show 310w usage per card when using FurMark and that PSU is still running strong today.
 
The OP's 850w PSU is very solid:
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=377
 
Even under a 835w load it doesn't even break a sweat... Power efficiency drops to 86.7% but the power regulation stays strong. He has absolutely nothing to worry about unless he's running a bunch of extra things like 6 HDD's, 8 case fans and a water pump.
 
 
 

bsmegreg
You should expect to see about 200W of power draw for the MoBo+CPU+HDD/SSD. All that together would be 750W which is fine for an 850W, but it is deffinitly borderline and going on to PSU Death Valley.

This isn't 2008. PSU's today are built to operate at or near their rated wattage. Just look at the JonnyGuru review I linked on his PSU. Capacitor ripple is only at 15mV under full load.

bsmegreg
It won't live its full life if you use 95% of its wattage for hours out of the day.

No, that's not true at all. The thing that kills PSU's is heat. One of the main things in a PSU that causes heat is bad power regulation and high ripple levels. The majority of these newer gold certified PSU's don't have that problem.

I've been wondering the same thing, I don't have much experience with this stuff in particular (late bloomer,) but upon internet research, it apparently should be fine, and it's my end result goal,  SLI 980 TI Hybrids, same PSU as well. Time'll tell, whenever I'm able to get my hands on a second hybrid anyway.

Hey guys!  I just read this thread for myself as I had the same question.  It appears that the real ANSWER is a 980ti SLI rig will draw 550w at load during gaming.  Here is the pudding/proof:
 

 
I just bought an eVGA G2 850w.  Yeaaaa!  

i run a corsair hx 850 (gold) with not one issue at all, cpu and gpus are over clocked

My SLI reference cards pull about 900w from the wall with the entire system being measured at 80%+ load. I use a 1200w to be safe.

Unless budget is big factor than that obviously it's understandable but if that's not the case, why some people like to run their systems to be on PSU that is  so close to its threshold.
Whiter today's PSUs are highly efficient or not it bound to happen that you pushing your PSU to its stressful limits that just a matter of time its asking for help as it cant keep up, and if it doesn't get it  .. well you might be replacing your PSU or other components sooner or later.
 

Zuhl3156

Mekhed

toyking22
i run a corsair hx 850 (gold) with not one issue at all, cpu and gpus are over clocked

Hi toyking22
How many watts is your system pulling folding those 980ti's?

I don't know if this helps you or not but my twin 980 board setup in my Z97 i7-4790k build draws 541w from the outlet when Folding using Kill-A-Watt similar to the above post.

I was just curious. ...my system with a pair of 780tis pulled a little over 700 watts and scored abut 540k to 580k ppd....pulled those in favor of a pair of 970s folding a little over 600 ppd and using about 420 watts. Was curious how close to the 90% of the 850 he was getting. My guess would be he has plenty of room there.

Mekhed

I was just curious. ...my system with a pair of 780tis pulled a little over 700 watts and scored abut 540k to 580k ppd....pulled those in favor of a pair of 970s folding a little over 600 ppd and using about 420 watts. Was curious how close to the 90% of the 850 he was getting. My guess would be he has plenty of room there.

I'm always curious about my power consumption. It's been a while since I used my Kill-A-Watt but I routed my PC through it for my mandatory energy audit by my electric company. My PSU is Platinum rated and my understanding is that a PSU is most efficient at 50% of its rated output so I should be at that golden sweet spot for efficiency.

I think your PSU size should tailored so that your minimum amount of draw falls into 40% of its rated output and your maximum draw around 70%. I think that would be the ideal choice when making your final decision.
 

 

I measured mine at the plug at with 2 980 SC Hybrids in SLI oc'd as far as they'd go and still be stable and an OC'd 4970k and it only drew like 774 or so.  That is oc'd to the max which isn't an everyday use so it'd be fine but personally I'd like a little more headroom so I went with the EVGA 1200 PSU.  
 
I'm actually running 3 980 ti SC hybrids on that same 1200 PSU at the moment.  I have a 1600 I bought with that 50% off thing EVGA had just because but haven't used it yet.