PSU for GTX 1080 sli

[EarthDog]

That's the thing..if your ear is on the tracks, you'd know that power use overall is going DOWN.That isn't to say something can come out more, but the trend is down. 750W will handle things fine. 850W if you want to feel warm inside... more than that, you are ripping yourself off.

As far as 550W.. I bet I could run 2 1080s stock in 550W....I mean I barely break 280W gaming with one.. add another 180W that's 460W. Would I ovlverclock on it??? Not much.. but it can be done on stock.

People overestimate for the sake of.... well, spending more, while real having lite idea of their actual NEED. You actual need for two 1080's and overclocking, is 600W... 750W IS buying headroom.

 

[DOM]

I need moarrrr lol

So ED not sure how much a good 750w,850w go for but if you find a 1000w for the same price or little more will you still go with the 750w?

Just checked the egg 750&850w are about the same for a gold and like 20 more can get you a 1000w.....

 

[FreedomEclipse]

Is a 4k monitor or multi monitor setups going to be involved?? Because at 1440p 1080Sli is so OP and so not worth the money. Just before christmas I stepped down from running two 970s to one overclocked 1070 and I have barely noticed a drop in frames and BF1 never goes under 90fps with everything on Ultra

 

[EarthDog]

I wouldn't spend $20 more DOM, nope. There isn't a need. Also, the EVGA G2/G3 PSUs are the best Tier 1 bang for the buck PSUs out there. Good luck finding a unit with the same Tier 1A quality, with that price.

For example $100 for a Tier 1A 750W EVGA G2... where is there a 1000W PSU close to that quality $20 more? 1KW is $150 from EVGA, the rest, like Corsair AXi, is like $250 ($300+ for 1.2KW). Corsair Axi, quality, Tier 1A, but a ripoff. Their 850W is $200! For the record, EVGA's is $120. $80 more for the same quality. OPr if you want the G3, its 750W is $120.

Is a 4k monitor or multi monitor setups going to be involved?? Because at 1440p 1080Sli is so OP and so not worth the money. Just before christmas I stepped down from running two 970s to one overclocked 1070 and I have barely noticed a drop in frames and BF1 never goes under 90fps with everything on Ultra

Been waiting for that answer in two threads now, LOL!

 

[FreedomEclipse]

I wouldn't spend $20 more DOM, nope. There isn't a need. Also, the EVGA G2/G3 PSUs are the best Tier 1 bang for the buck PSUs out there. Good luck finding a unit with the same Tier 1A quality, with that price.

For example $100 for a Tier 1A 750W EVGA G2... where is there a 1000W PSU close to that quality $20 more? 1KW is $150 from EVGA, the rest, like Corsair AXi, is like $180. Corsair Axi, quality, Tier 1A, but a ripoff. Their 850W is $200! For the record, EVGA's is $120. $80 more for the same quality.

Id avoid the AXi range unless OCD or really anal about checking power usage every 10mins... Im starting to find their AX range also questionable as I have had a less that 6 month old AX850 fail on me and most recently an AX760 starting to fail after less than 2 months.

 

[DOM]

Not clue what's out or good just went off prices lol

 

[EarthDog]

Yup.. EVGA has really changed the game in the Tier 1A side of things. You honestly can't find any better for the price.

 

[DOM]

I'm still running my AX1200 but about time someone doesn't price gouge

Maybe he's going to give me his 980ti SHHHH

 

[jonathan1107]

EarthDog are these prices you're giving me in CAD?

@FreedomEclipse I don't think it would be that overkill considering the monitor I got can do 165hz.

Went with acer xb241yu

 

[EarthDog]

I'm not in Canada, no. Please check newegg.ca for your specific prices. The price might be higher up north, however so will everything else making my point still remain the same on the evga psus.

2 1080s for 2560x1440? Oy... just get one 1080 or wait for the Ti. Two are just silly at that res, even if you are running 165hz or whatever.

 

[jonathan1107]

I'm not in Canada, no. Please check newegg.ca for your specific prices. The price might be higher up north, however so will everything else making my point still remain the same on the evga psus.

2 1080s for 2560x1440? Oy... just get one 1080 or wait for the Ti. Two are just silly at that res, even if you are running 165hz or whatever.

Got it. I'll look up the 750w and 850w evga g3

 

[quest_for_silence]

As far as 550W.. I bet I could run 2 1080s stock in 550W....I mean I barely break 280W gaming with one.. add another 180W that's 460W. Would I ovlverclock on it??? Not much.. but it can be done on stock.

But the second card won't draw as much as the first card on load (often 35-50% but up to around 70%).
Take also into account that oc'ing a 1080 "usually" add 20-40W on top of the stock clock power consumption, depending on game and card (for "usually" I mean the typical level of overclock, as seen almost always in the reviews and on most of the gaming rigs).

 

[NdMk2o1o]

With reference to accuracy that Outervision tool is close to garbage: moreover, that tool output is not comparable to a power meter one, as the first is a mere guess, the other one a direct measure.

BTW, I don't pretend to teach the truth to anyone, but to tell some actual facts (and not something I pretend is a fact): that's why I gave examples of.
If you are sizing a PSU over actual figures, then look around for figures, as there are some all over the web. In case you don't like the one I pointed out, just look for some different ones, in order to see if they sound more convincing to both you and me.
OTOH if you are more comfortable to size the needed PSU capacity upon personal habits and beliefs, do what you think best: at worst I may think you will waste some money, but it is not mine, so...



That's one major issue, likely: usually things don't work that way.

You can't add each power figure like they were LEGO bricks: that's why I already pointed out two actual measures (KitGuru and TechSpot), not educated guessworks, which are inconsistent with any assessment based upon any too simplistic addition and subtraction, at least IF the actual gaming power draw IS the requirement.

OTOH IF you wanna benchmark something, or partecipate to overclock competitions, or eventually perform a tough and thorough stress test, or anything similar and not just gaming, your mileage may vary with reference to the expected power draw (i.e. the two quoted examples don't apply).

Have a nice time!

Ok Mr "new guy who is right and won't listen to anyone else"

Let me break this down for you, you are correct in saying that in theory a 550w COULD power a 1080 sli system, it could but you are not taking into account benchmarks, demanding games, other components etc or spikes in voltage and wattage for instance when a computer is powered on, you are talking about a bare minimum required for such a system.... Minimum, a psu is at its most power efficient when it is being run at around 50% running at 90-100% for extended periods of time will shorten the lifespan of the psu and risk your other components, so yea it's possible, but those in the know know you need at least a 650w unit for such a build, but this knowledge will come over time when you realise that just because you type something doesn't make it gospel, pipe down and learn like we all have

 

[quest_for_silence]

Ok Mr "new guy who is right and won't listen to anyone else"
...snipped out...
but you are not taking into account benchmarks, demanding games, other components etc or spikes in voltage and wattage for instance when a computer is powered on

There's a chance you overlooked what I wrote in the post you're quoting: «In case you don't like the one I pointed out, just look for some different ones, in order to see if they sound more convincing to both you and me.» and again «IF you wanna benchmark something, or partecipate to overclock competitions, or eventually perform a tough and thorough stress test, or anything similar and not just gaming, your mileage may vary with reference to the expected power draw (i.e. the two quoted examples don't apply).» I guess those somehow applies to the above quote.

In the end, paraphrasing another poster, the OP asked for recommendations and I gave my advice along with some supporting data: if you don't agree, fair enough, I don't pretend anything, neither I'm close minded, but I'd like to learn something (and in case to change my mind accordingly) upon similar actual data.
If you also feel I was arrogant, I beg your pardon, it wasn't meant so: I just tried to be objective and pragmatical, within the limits of my english proficiency.

Have a nice time!

 

[Toothless]

So uh, how many threads are you gonna make for this "1080ti" junk? Is the motherboard next?

 

[NdMk2o1o]

There's a chance you overlooked what I wrote in the post you're quoting: «In case you don't like the one I pointed out, just look for some different ones, in order to see if they sound more convincing to both you and me.» and again «IF you wanna benchmark something, or partecipate to overclock competitions, or eventually perform a tough and thorough stress test, or anything similar and not just gaming, your mileage may vary with reference to the expected power draw (i.e. the two quoted examples don't apply).» I guess those somehow applies to the above quote.

In the end, paraphrasing another poster, the OP asked for recommendations and I gave my advice along with some supporting data: if you don't agree, fair enough, I don't pretend anything, neither I'm close minded, but I'd like to learn something (and in case to change my mind accordingly) upon similar actual data.
If you also feel I was arrogant, I beg your pardon, it wasn't meant so: I just tried to be objective and pragmatical, within the limits of my english proficiency.

Have a nice time!

I don't know about you being arrogant, you're just wrong mate, move on and learn from it, a 550w psu is not suitable for a 1080 sli system in any which way you choose to paint it, so keep on talking like you're correct... Doesn't change the fact you're wrong though does it?

 

[quest_for_silence]

Doesn't change the fact you're wrong though does it?

I beg to differ. I think we can move along from that.

 

[Toothless]

My point is before you went on your rant is you can have all of your questions in a single thread. Pretty sure i made that obvious.

 

[Nicholas Peyton]

I was running:
SLI 980
and
power hungry FX chip (overclocked to 4.8ghz) and never had any issues with a 850W, Bronze PSU.

 

[jonathan1107]

My point is before you went on your rant is you can have all of your questions in a single thread. Pretty sure i made that obvious.

I didn't see it becoming a problem.

 

[EarthDog]

But the second card won't draw as much as the first card on load (often 35-50% but up to around 70%).
Take also into account that oc'ing a 1080 "usually" add 20-40W on top of the stock clock power consumption, depending on game and card (for "usually" I mean the typical level of overclock, as seen almost always in the reviews and on most of the gaming rigs).

it can, easily, which is the point. I won't do it and I'm all for buying what you need.

I was running:
SLI 980
and
power hungry FX chip (overclocked to 4.8ghz) and never had any issues with a 850W, Bronze PSU.

No??? You are kidding!!? An overkill psu for 2 980s and it worked?!!! You could have do e that on a 650W or less PSU man.. come on.

I didn't see it becoming a problem.

Typically, you keep to one thread for a build... the problem happens when you create a thread on each is the crossover and redundant advice and and time wasted for the the volunteers helping.

As I said via PM, I'll get you a PCPPicker build today... this has gone on long enough with enough questions already, lol!

 

[jonathan1107]

Yes I agree. Although I haven't added more questions. To me this thread is complete. I didn't think we'd talk about the rest of the build. I just thought by creating a CPU thread, the CPU geeks would be happy to advise

Whereas PSUs are en entirely different beast.
But yes, I don't mind unifying my threads as much as possible in the future.

Thanks for all the feedback guys. I really do appreciate it

 

[EarthDog]

Not sure what thread to put this in, but... here goes:

If you are planning multi-GPUs in the future and M.2 devices (you should really consider these)

$830 - 6850K (40 PCIe lanes)
$380 - Gigabyte X99 Ultra Gaming
$280 - 4x8GB DDR4 3000 CL15
$900 - MSI GTX 1080 Gaming X
$420 - OCZ RD 400 M.2
OR (If you can't justify in your head the M.2 drive)
$300 - Samsung 950 Pro
$140 - EVGA G2 750W


I found these and their prices at newegg.ca. If you want to PCPPicker it, have at it. But this is what I would get. Good luck.

 

[jonathan1107]

Not sure what thread to put this in, but... here goes:

If you are planning multi-GPUs in the future and M.2 devices (you should really consider these)

$830 - 6850K (40 PCIe lanes)
$380 - Gigabyte X99 Ultra Gaming
$280 - 4x8GB DDR4 3000 CL15
$900 - MSI GTX 1080 Gaming X
$420 - OCZ RD 400 M.2
OR (If you can't justify in your head the M.2 drive)
$300 - Samsung 950 Pro
$140 - EVGA G2 750W


I found these and their prices at newegg.ca. If you want to PCPPicker it, have at it. But this is what I would get. Good luck.

Thanks.

Final questions and I'll be set:

1. Should I only install Windows and drivers and important programs on the m.2 drive? Or would games benefit from it?

2. I'm starting to wrap my head around the pci-e lanes notion. If I got this right: 28 lanes come from the CPU (i7 6850k) and 12 more from the mobo right? That means 16x are used for the gpu. 32x if I have 2 cards eventually. Leaving 8x. That means I could fit in one m.2 at x4 and say one sound card or another m.2 drive right? Sata ssds do not count towards as pci-e lanes I take it.

So if this was a i7 7700k scenario with a z270 mobo. I'd be limited at 16x lanes provided by the CPU and 12x from the mobo for a total of 28x?

3. Lastly. Do M.2 drive use "more than x4 pci-e bandwidth? Or max x4? Same for a sound card?

4. Would I be correct in assuming that not all motherboards offer the same number of pci-e lanes or does it only depend on the motherboard platform (z170 Vs x99) for instance?

5. Although it is probably a minimal impact, I'll assume that quad channel RAM Is slightly better than dual channel in terms of performance?

 

[EarthDog]

1. Game load times will benefit, certainly. I would put your most played titles on it, absolutely.
2. More or less. It will depend on how the board breaks things down as some are different.
3. Nope. Its MAX. They currently do not saturate that 4x bus.
4. Its platform/CPU specific. Z270 has less, a total of 24. X99 starts out with 28 and jumps to 40 with the higher end CPUs.
5. Yes. Though you are spot on, the performance difference is negligble. Though you can save money and go dual, to me, its a kick on the jock to have quad channel and not use it. Yes, goes against how I spend as well, but, If I am going to invest a couple grrrrrrrr in a system, another $50 to have what the system is supposed to have is nothing.