starting a 1080 TI sli build

JMG___Corey · Mar 1, 2018

okay im here because i would like to start a 1080 TI sli build if anyone could help me out that would be great. heres my list so far http://prntscr.com/ilhapi and if it dosen't show up i can screen shot it http://prntscr.com/ilgz4t i already have most of the pc build i just want to add on another 1080 ti but i think i may need more watts maybe a 1k psu and maybe a better processor i currently have a i7 4790 3.6ghz don't know if thats needed to be upgraded or not. thanks

Wolfshadw · Mar 1, 2018

1) That motherboard does not support SLI. For an SLI rig, each PCI-Ex16 slot must be able to run at least x8. The second PCI-Ex16 slot on the motherboard you have listed is only x4.

2) For a 1080Ti SLI build, I'd probably recommend a quality PSU of at least 850 watts.

3) The motherboard you have listed is only compatible with the 8th Generation Intel Core I-series processors. Your current I7-4790is not compatible.

4) The Intel Core I3-8100 processor you have on your list would severely limit the SLI set up. For a top end SLI config, you're going to want a top-end processor (Intel Core I7-8700).

-Wolf sends

feelinfroggy777 · Mar 1, 2018

What monitor will you be using for this build? As someone who has 2 1080ti's in SLI, your bottle neck will be your monitor. So adding the other 1080ti wont do much good. Not to mention, SLI support is dead.

But if you must, I would go with something like this. 850 watt PSU would probably be the minimum, but it should be enough.

PCPartPicker part list: https://pcpartpicker.com/list/DVp4D2
Price breakdown by merchant: https://pcpartpicker.com/list/DVp4D2/by_merchant/

CPU: Intel - Core i7-8700K 3.7GHz 6-Core Processor ($347.79 @ OutletPC)
CPU Cooler: CRYORIG - H5 Ultimate 76.0 CFM CPU Cooler ($46.88 @ OutletPC)
Motherboard: Gigabyte - Z370 AORUS Gaming 7 (rev. 1.0) ATX LGA1151 Motherboard ($199.99 @ Newegg)
Memory: G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-3000 Memory ($169.89 @ OutletPC)
Storage: Samsung - 960 EVO 250GB M.2-2280 Solid State Drive ($110.99 @ SuperBiiz)
Power Supply: SeaSonic - FOCUS Plus Gold 850W 80+ Gold Certified Fully-Modular ATX Power Supply ($99.99 @ Newegg)
Total: $975.53
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-03-01 12:21 EST-0500

JMG___Corey · Mar 1, 2018

i really dont know what you looked at i didn't have an i3 on that list maybe it glitched out . i have a i7 4790 witch works with my mobo/ also on my mobo it says sli works and im looking at the card slot asrock z97 extreme 6, i have all of whats on the list click the screenshot. also im running with a 3440 x 1440p 100hz monitor. i have 16gb ram 1tb hard drive already have 1 1080 ti just looking to buy another

Wolfshadw · Mar 1, 2018

OK. When I clicked on your link for PC Part Picker, it apparently pulled up something I was previously working on. Sorry about that.

-Wolf sends

JMG___Corey · Mar 1, 2018

all good

just take a look and let me know

King_V · Mar 1, 2018

I agree with feelinfroggy777. Your monitor will be the limiting factor - and SLI support is dying.

What is the resolution and refresh rate of your monitor?

JMG___Corey · Mar 1, 2018

my monitor is 3440 x1440p 100hz its the acer predator 34

feelinfroggy777 · Mar 1, 2018

JMG___Corey :

You have a fantastic monitor. I know because I have it as well. In some titles, you will see a benefit from SLI. Good scaling will be about 30% improvement, giving you around a 20fps bump. But that is when scaling is good and when SLI works. More often than not, SLI will give you zero performance gains or hurt performance. Here is a really good read on SLI. It is dated 2014, but it is updated regularly and will explain everything.

https://linustechtips.com/main/topic/197327-the-sli-information-guide/

As far as your system is concerned, the 4790 should not have any issues supporting SLI. I don't know what board you have, but most midrange boards that support the 4790 should support another GPU. Just look at the specs and see if it has 2 PCIe 3.0 16x slots that can run in 8x con

Given the high prices of GPUs right now, a 1080ti is running over 1k. If you are just wanting better performance, I would consider getting a 8700k, mobo, and RAM. The combination will be a lot less than the 1k cost of the 1080ti and you will see a bump in every game. You just wont get as big of a bump in games that support SLI.

JMG___Corey · Mar 1, 2018

i think ill just get another gpu lol. but you think ill be getting the most out of the gpu with a 4790? cause i really dont feel like re buying another mobo/ram etc etc also it does support sli says it on the board.

King_V · Mar 1, 2018

feelinfroggy777 :

Out of curiosity, does a single 1080Ti actually have any trouble hitting 3440x1440 @ 100 fps, say with most modern games and settings maxed out?

JMG___Corey · Mar 1, 2018

i never hit 100 honestly in most games im around 60-80ish but on kingdom come deliverance fps is in the 40s. gta v i go from 50-60ish thats why i want to sli because this res is nice but not enough power for 1 card.

King_V · Mar 1, 2018

A 1080Ti is supposed to be able to mostly manage 60fps (some exceptions) with details cranked all the way up on 4K screens.

At least, I thought so. Not speaking from experience or extensive knowledge, but given that 3440x1440 is only about 60% of the number of pixles that's on a 4k screen, I'd imagine that a 1080Ti would breeze right through that.

I'm guessing now that my assumption has been wrong?

JMG___Corey · Mar 1, 2018

well i play all my games fine its just i like playing high demanding games like the grass in gta v will bring me down to 40s in the city i can go as far as 80fps. but stays around 65-70. on this kingdom come deliverance game is un optimized AF so im 30fps-50. witcher 3 im like 65-70 no problem destiny 2 nearly 90 fps. so it just depense on the games. i just want to make it where every single game i play can use my 100hz monitor to its advantage. tom clancy seige 60 fps fine. war hammer vermintide 2 solid 60 fine, its only really high end graphical games that give me an issue sometimes. and you thought right its suppose to but i guess its not that great far as power goes.

JMG___Corey · Mar 1, 2018

okay so guys real quick sense you all said my setup will work say i upgraded to i7 7700k cpu instead of staying with i7 4790 how many more fps would i gain ? any idea or just stick with the i7 i have now

feelinfroggy777 · Mar 1, 2018

I would stay with your 4790 over a 7700k. You will probably see a 5% bump with a 7700k (maybe more with an overclock) and you would need a new mobo, RAM, and CPU. Might as well go with the 8700k at that point.

To be honest, I have not played Kingdom Come, but I plan on getting it. I have heard that it is not optimized very well. This is an issue with the game and not the hardware. I would be very surprised if Kingdom Come has much SLI support. If you get positive scaling, it will be in the single digits.

Good luck man!

JMG___Corey · Mar 2, 2018

yeah thats why i decided to buy a i7 4790K its boosted up to 4.4GHZ and only 400$ also will work with all of my current specs.

feelinfroggy777 · Mar 2, 2018

JMG___Corey :

$400 seems high for that chip. I would look on the used market for one and pay about half as much.

feelinfroggy777 · Mar 2, 2018

[/quotemsg]

Out of curiosity, does a single 1080Ti actually have any trouble hitting 3440x1440 @ 100 fps, say with most modern games and settings maxed out?[/quotemsg]

No, the 1080ti wont hit 3440x1440p at 100hz in all games. Poorly optimized games fall on the software and not the hardware. This is why throwing another GPU wont solve the issue for those games. And for the games that have a lot of optimization, they don't need the additional GPU.

JMG___Corey · Mar 2, 2018

actually ive never hit 100fps in a single game with my setup. farthest ive gotton was like 90 in destiny 2.

feelinfroggy777 · Mar 2, 2018

JMG___Corey :

Must be the 4790. I have a 7700k and hit 100fps no problem. It has been awhile since I played destiny 2, but I think it held 100 pretty easy. But the 7700k is OC'ed to 5ghz, so the clockspeeds make a difference vs a locked 4790.

JMG___Corey · Mar 2, 2018

so you think the i7 4790k 4.0 ghz boost up to 4.4ghz would make a big impact on my fps? i wouldnt mind buying a different one even higher but i would have to re build a whole PC for that. or you think if i was to upgrade just go ahead and buy a new mobo and a 8700k?

natx808 · Mar 2, 2018

JMG___Corey :

SLI Bridges don't come with the video cards either, so you will want to look for a SLI HB BRIDGE. The HB stands for high bandwidth and offers additional performance over the old kind of SLI bridges. Also note they come in different spacings depending on how your cards are installed in the case. they run around $20-30 bux.

JMG___Corey · Mar 2, 2018

oh ok thanks for the info natx808. so if i was going to just say screw it and buy the best for gaming for my sli what would be the better choice here i7 7700k/i7 7740x/ or i7 7820x? also the mobo aswell? i have a black/blue case i would like to keep it in that color range.

feelinfroggy777 · Mar 2, 2018

JMG___Corey :

8700k is the best gaming chip on the market today, and it is not really close. I would take it over any chip you mentioned.

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