PSU for i7 8700k OCd and 2 GTX 1080Ti ROG Poseidon SLI OCd?

gonza9 · Mar 12, 2018

Hello,

As title says, I would like to know what is a good wattage for a PSU for this rig.

i7 8700K @ 5.0Ghz, maybe push 5.2Ghz if possible.

2 GTX 1080Ti ROG Poseidon SLI @2100Mhz, 20% over voltage (based on what I've seen online abput this GPU).

I picked a SeaSonic Prime Ultra 1000W 80+ Titanium.. as I've read this should be enough, but when I run the PSU Calculator it recommends 1300W, but I find this a bit in excess. Thoughts?

Thanks in advance!

feelinfroggy777 · Mar 12, 2018

I have a 7700k and 2 1080ti's and I have a 1000 watt EVGA G2 PSU. A good 1000 watt PSU will be good for that system and the Seasonic Prim Ultra is a really good PSU. You could probably get buy with a 850 watt PSU, but I would rather have some breathing room, especially with those high OC's.

Did you already build this system? As someone who runs 1080ti's in SLI, it really is a waste because your monitor will be your bottleneck. Until high refresh rate 4k monitors are released, you will only see 60hz. Plus SLI scaling is really bad. Most of the games I bought that were released in the second half of last year have really bad scaling or negative scaling. More than half of the time I am on my PC, SLI is turned off because of the negative impacts it has on a lot of games. Just so you know the truth about it.

gonza9 · Mar 12, 2018

Dear feelinfroggy777,

Thanks for your help. Based on your experience, I guess my initial choice was correct.

I didn't build it yet. I am doing all the research. Is gonna be my second build in my life, the previous one was in 2008, with little to none technical expertise in the matter and came up being a great rig, still working pretty decent today and still givimg me lots of satisfactions...
But this time I am planning to go all in, and since I have a couple of months till I get the money, I am using all this time to read about each and every component to try and get the best out of everyone of them.

I am definitely going for a single GPU at the begining, and looking forward to SLI in the future, but I want to build the system with the headroom for it already, therefore the PSU choice.

Now I am not looking for a 4k so far, actually, I am going for a 1440p 165Mhz monitor, exactly for what you mentioned about the low refresh rates of 4k at the moment.

Now if you have any other recommendation, is more than welcome! Can give you an idea of the whole setup I am planning.

Cheers!

feelinfroggy777 · Mar 12, 2018

I would not lock yourself into a PSU or GPU at the moment. Typically, nest generation GPUs will consume less power, not more. So headroom is not as big of an issue. Eventually, Nvidia (or AMD) will release new GPUs. There was talk that it would happen at the end of March, but those rumors have been debunked. So maybe this summer we will get a new release. Pending your purchase timeline, the new model GPUs may be released around that time, so I would look at the latest generation. They should consume less power than what is on the market now, which will decrease you need for a more expensive PSU. An 850 watt PSU may be enough for that system if you back off of some of the crazy OC's.

feelinfroggy777 · Mar 12, 2018

RAM and GPU prices are crazy right now, it is the worst time ever to build a gaming PC. A single 1080ti here cost about as much as what I paid for both of mine. But this is a really nice build and it spares no expense. I would go with a 850 watt PSU. If you want to add another 1080ti, you should be able to with that PSU, I would just not run them at 120% power. For a next gen GPU, it should be more than enough. The days of massive PSUs are going away.

PCPartPicker part list: https://pcpartpicker.com/list/jFcxYT
Price breakdown by merchant: https://pcpartpicker.com/list/jFcxYT/by_merchant/

CPU: Intel - Core i7-8700K 3.7GHz 6-Core Processor ($338.89 @ OutletPC)
CPU Cooler: Corsair - H115i 104.7 CFM Liquid CPU Cooler ($129.99 @ Newegg)
Motherboard: Gigabyte - Z370 AORUS Gaming 7 (rev. 1.0) ATX LGA1151 Motherboard ($218.90 @ OutletPC)
Memory: G.Skill - Trident Z 16GB (2 x 8GB) DDR4-3200 Memory ($174.99 @ Newegg)
Storage: Samsung - 960 EVO 500GB M.2-2280 Solid State Drive ($199.89 @ OutletPC)
Video Card: EVGA - GeForce GTX 1080 Ti 11GB FTW3 HYBRID GAMING Video Card ($1299.89 @ OutletPC)
Case: Phanteks - Enthoo Luxe Tempered Glass (Black) ATX Full Tower Case ($178.19 @ Newegg)
Power Supply: SeaSonic - FOCUS Plus Gold 850W 80+ Gold Certified Fully-Modular ATX Power Supply ($105.97 @ Amazon)
Total: $2646.71
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-03-12 10:25 EDT-0400

fredfinks · Mar 12, 2018

Just chiming in to go for a single GPU. also a 32" 16:9 1440p monitor (larger screen area than a 34" 21:9 and much more practical for other use - work, video & web.

Consider that a 34" 21:9 is only a 27" viewable space with 16:9 content.

fredfinks · Mar 12, 2018

feelinfroggy777 · Mar 12, 2018

fredfinks :

I second the 34". I have an Acer Predator 34" ultra wide and I don't think I will ever go back to 16:9. It has a lower refresh rate of 100hz, but it is very immersive. It also makes the whole PC experience better. They are releasing a 34", 1440p, 200hz panel this year (supposed to) and I will be all over that monster when it is released.

fredfinks · Mar 12, 2018

This is the difference in size of displaying 16:9 content on a 34" 21:9 vs a 32" 16:9.
thats why you dont bother with 21:9

gonza9 · Mar 12, 2018

https://pcpartpicker.com/list/YBQd6s

This is the system I am planning on. Maybe slight changes to Storage drives, but pretty much the rest is that. For cooling Ill go with a EKWB custom loop, same as the PE360 kit but with different cpu block and reservoir to go for the RGB ones. This is why also the choice of the Poseidon over the Strix, already with waterblock.

The SLI idea was more out of fanciness.. but I was never 100% convinced about it.. And I think you just talked me out of it. So in that case will downgrade to the 850W Titanium as mentioned.

Once again, feel free to give further recommendations, as as I mentioned before, is my first build with "some" technical expertise... but I am feeling quite confident about it.

Now monitor choice is really more of a budget choice, have a 27" in actual PC and feel quite happy with it.

Thanks!

feelinfroggy777 · Mar 12, 2018

fredfinks :

I guess I misread your statement. Yes, on a 34" panel, 16:9 format has the same dimensions as a 27" monitor. But 21:9 ratio is very common in PC gaming. There are only a couple of games that I have that don't support it out of the box (Dark Souls 3 and Fallout 4). But with a mod you can get them to support 21:9 aspect ratio.

Additionally, I work with my PC and I love the fact that I can have multiple large spread sheets open on one screen. Or 3 web pages will full text. 21:9 is create for a workstation, in my opinion.

fredfinks · Mar 12, 2018

Feelingfroggy: i guess its subjective, but the killer for me is that 16:9 content (outside of gaming) is SO common.

OP, regarding your pc, you are building a high end pc with expensive (unecessary) parts (such as water cooling loops & $$$ motherboard) which i think is a waste when compromising & not using a larger monitor. You could cut back a bit (with no perfomance loss) and afford a great monitor.

16:9 or 21:9, just go with a monitor over 30". Its what we look at. its our interface. the box just drives the monitor.

feelinfroggy777 · Mar 12, 2018

fredfinks :

Actually, films are shot in 21:9 aspect ratio. Only television uses 16:9. This is why you have the black bars on your TV when watching a movie. On my 34" panel, I don't have any black bars when watching a movie and it fills the whole screen.

But your right, youtube videos and other content are shot in 16:9 and will have black bars on the sides in full screen. Even cut scenes in most games are usually in 16:9 and you will have the black bars.

gonza9 · Mar 12, 2018

I am aware of the extra $$$, however, I am not the kind of person that upgrades the system every 1 year... as I said, I am upgrading my previous system cause... well... it has 10 years already... so you get the idea...
That's why the choice of 32GB Ram even though I read 16GB should be enough, etc...

Also, I gotta admit, there is a bit of aesthetics on it hehe what can I say... so some extra $$$ for RGB parts...

The choice of custom loop is based on what I've read about the high temps of the 8700k under OC and I am planning on a single loop for both the CPU and GPU... Now the watercooling choice has many factors, being the just mentioned the main one, but also looking for more of a silent system and also as I live in a VERY dusty place, I am trying to avoid blowing a lot of air into the case...

Now, mobo and other stuff, since I am into this RGB whatever... I guess sticking to a single manufacturer will avoid having 17 softwares to run the RGB modules... now I am new into this so I might be wrong here?

May I add that most probably I will be getting the CPU from Silicon Lottery for 5Ghz.

Storage wise, I want to have some cap as I want to use this for Flight Sim and once you start with the add-ons for that that thing can get heavy AF... but I might be cutting on the HDD for a future SSD...

As I reply, I am currently checking 34" 21:9... Acer X34 or Asus Rog PG348Q?

Don't know... as I said... and as you can probably see... I am a nooby here so for sure many rookie mistakes...
But on the other hand I want something to last without future upgrades... thats why I wouldnt mind going a bit more $$$ on the short run and no $$ on the long run...

Once again, thank for all the help!!

fredfinks · Mar 12, 2018

all good. OP just happy youre now considering a large monitor.
its for your sake & you wont regret it.

im not sure of the differences between those models. hopefully froggy can fill you in and/or look at some reviews.
enjoy

(regarding RGB stuff - i keep out of it. To me, a PC should neither be seen nor heard. Just monitor & mouse/kb/controllers)

feelinfroggy777 · Mar 12, 2018

I have the Acer X34. The Asus PG348Q is the same panel. They have identical features and I believe the actual panels are made by the same manufacture. Some people hate Acer and love Asus, others hate Asus and lover Acer. Typically they are the same price, but I would look for sales and go with whichever is cheaper.

AOC makes a similar panel for cheaper, but it does not have the brand recognition that Asus and Acer have. I don't own any AOC products, so I cant comment on their quality, but the AOC panels are a good bit cheaper.

gonza9 · Mar 12, 2018

Keep on reviewing 27" vs 34" and I am not quite sure if 34" would be a wise choice for my usage.
Main use will be gaming, little to none movies except maybe for some GoPro videos from my holidays, and I am a Flight Sims, Racing and GTA games kind of guy... not really into those Fallout styke... Call of Duty/ Battlefield/CS is definitely a YES.
Now I understand based on what I read that one can really benefit from the experience with a higher refresh rate monitor that is what the 27" one would give me against the 34".

What do you think? Is a $400 difference we are talking about... tough...

fredfinks · Mar 12, 2018

The monitor you have selected is $741, the x34 is $996. Both from amazon. Yes, worth it. 27" is too small.

I think higher refresh rate is overrated. Unless youre playing Counterstrike (CS:GO, very fast action FPS game)). As far as competitveness goes, every split second counts in online games and to give an idea - a few years ago i was in the top 125 in World of Tanks for average XP per game on south east asian server (had to be very good, consistently). roughly 145k individual players over the week. I was on a 60hz monitor. The one i still use.

The main thing is that a game's framerate does not dip below 60fps, which will not happen with a 1080ti at 1440p.

The samsung monitor i have is only $380 on amazon. s32d850 Top notch quality. Again, screen size larger than a 34" 21:9.
https://www.amazon.com/Samsung-WQHD-LED-Monitor-S32D850T/dp/B00L3KNOF4

Again, the larger screen size will make a huge difference/immersion/fun for your gaming & sims. 16:9 or 21:9

Is the $741 27" worth it over the 32" samsung for $380? hell no, thats absurd. its a downgrade for twice the price.

gonza9 · Mar 12, 2018

Thanks for your detailed response. The X34 you're looking for is the older model, with the new one being $1200, but with OC to 120Hz. Just info.

I liked your response, cause if there is something I definitely won't be doing is internet multiplayer, even less online competitions/rankings etc...

Guess a downsize in FPS is a smart choice, but I feel bad having that system and not squeezing it...

And gotta admit, sometimes, being able to go for the higher end stuff is a treat to the soul... even though it might not be the smarter choice...

Guess I have some time to.think about it.. but I have to decide on the monitor first cause most probably I will be buying it first to use it with my current PC, and later on get the new rig (that will also alleviate the pocket a bit).

Thanks again! You guys been of the utmost help!

fredfinks · Mar 12, 2018

Id get the monitor now, im like a salesman for the samsung but at that price its a bargain.
Games will become more intensive, and id prefer a push on models /textures & lighting then putting future GPU power to extra pixels or framerate.
i.e. minecraft or pong will still look the same at 10000000k pixels or fps. what gives realism is the attributes i listed.

If your current card is underpowered, just drop the game's graphics settings so youre at 60fps at peak times. Meanwhile non gaming productivity will be amazingly better, even runnning on onboard video.

Also for squeezing your system, as long as your cpu is enough to feed the game, gaming is reliant on your vid card.

i.e. im still running on a 6600k but with a 1080ti. the extra perfomance with an oclocked 8700k & watercooling is negligible to not much. its just a bit of icing regarding gaming.
the main difference is if youre doing encoding or doing other work - running software that takes advantage of the extra cores & hyperthreading.
(Im not suggesting that you dont buy the 8700k. For gaming its the best cpu to have)

feelinfroggy777 · Mar 12, 2018

fredfinks :

In my opinion, your holding yourself back with monitor and a 1080ti. A 1070 would be enough to push that monitor.

There is a lot more to monitors than size and resolution. 10 years ago, everything was about size and resolution. While a 32" panel or larger may be great, it does depend on how close you are to the screen. 27" panels are considered large for PC gaming because generally you are sitting much closer to the screen.

There is a big difference between 60hz and 100hz. The difference is not as large between 100hz and 144hz. There is even a big difference between 60hz and 75hz.

The Samsung monitor that you highlighted is half the price of the PG27, but it has a 60hz refresh rate at 1440p with a VA panel. The comparable Asus/Acer panel will have variable refresh rate (gsync) IPS (much better colors and viewing angles) and a higher refresh rate.
It is not even close to a downgrade for twice the price. Seeing high refresh rate gaming at high resolution is something that you cannot unsee. Its like the first time you saw high definition. Pairing a 60hz/1440p monitor with a 1080ti is like getting a Ferrari and putting cheap gas and cheap tires on it.

I would also wait till you build the computer before the you get the monitor, especially if you want a ultrawide. High refresh rate, high resolution HDR monitors are coming this year. So if you want the best, they are coming. They will also set a new ceiling on the high end, making some of the current high end monitors cheaper.

HDR is fantastic, there is just not a lot of content. A lot of AAA games are being released with HDR support. If you put a 1080p panel with HDR and compared it to a 4k panel without HDR you would pick the 1080p as having the better picture.

gonza9 · Mar 12, 2018

Yeah, distance from monitor was one of the factors I was considering... thats why I thought 27 was enough as I already have a 27 and know how it looks. However after you guys started talking about 34" O watched a video by Linus about 21:9 talking about how bettdr the experience with racing games and specially Flight Sims is ( which is my thing, being myself a pilot IRL). But I keep on thinking that the 27" Asus will be a better choice. I am.definitely getting the monitor first as I am bringing my old PC to where I live so I am gonna need a monitor for it.

But Ive narrowed it down to the PG279Q or the Acer X34. I guess closer to the date of purchase I will analyze based also on my budget available.

Thank you guys! Been a pleasure!

Toxic_Cobra · Mar 14, 2018

If you wait there will be VA panels that go to 200 hz with HDR, otherwise the Dell aw3418dw is probably the best ultrawide on the market right now, especially if you catch it on sale for the same price as the x34. Some of the Asus/acer ultrawides have trouble overclocking to 100 hz and the Dell is 100 out of the box oc'able to 120 hz. Im glad I didn't wait, just know some fps games (like CS) don't support 21:9 very well and have black bars or just zoom in to fill in the screen, others have good support.

gonza9 · Mar 15, 2018

Toxic_Cobra :

Yeah just found out about the Alienware and quite sure I will go for that one. I read about the new VA HDR Panels but wont they be worst compared to IPS panels?? I am waiting also on the new 35" and 27" 4K from Asus... lets see

Thanks for your help!

fredfinks · Mar 21, 2018

No, VA panels arent worse. There plenty, including a few moderators here, that prefer them to IPS. They have much better blacks & no IPS 'glow'.
View angles diff now is negligable to non-existant vs IPS. Color reproduction is same.
Long story short they are both good & the right choice. VA or IPS, the thing is DONT get a TN.

I'm still plugging at you not to get the 27". Still recommending 16:9 over a 21:9. (for practicality, screen area, & compatibility)

You were discounting the samsung because it only does 60hz. This 16:9 32" LG does 144hz gsync. ($797 on pcpartpicker)
LG 32GK850G-B http://www.lg.com/us/monitors/lg-32GK850G-B-gaming-monitor

Doesnt appear to have HDR but if youre that keen for that feature i'd wait as toxic cobra said. Again, the reduced display size on a 21:9 with most common content is just a waste.

PSU for i7 8700k OCd and 2 GTX 1080Ti ROG Poseidon SLI OCd?

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