i7 4790K possible bottleneck of RTX 2080?

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filip.kotlik

Commendable
Nov 2, 2018
47
0
1,530
Hi,

so the best will probably be list my specs first:

CPU: i7 4790k 4.4 ghz
MB: asus z97-ar
Ram: kingston 16 gb ddr3, 1866mhz
Gpu: rtx 2080 msi gaming x trio
Psu: fractal design 750W 80 gold
Windows 7
Monitor: LG 2560x1080, 75hz
Cpu cooler: noctua... (its massive)

The problem:
Recently i purchased the new rtx 2080 MSI gaming x trio. Upgrading from 980 ti, i thought my fps will fly trough the rooftop. Well that didnt happen. Actually i see only slight performance boost in games. I try to figure out where is the problem using msi afterburner and other build in benchmarks in games. The most problematic is the assassins creed odyssey and origins, where my fps drops under 30 fps, the avererage is 50. Msi afterburner shows that my cpu has 99% usage, and gpu only 60%. I tried to set Resolution modifier to 160% but fps stsyed the same, only gpu and cpu now both on 99%.

Another problematic game is for honor, where my fps is over 120 fps without supersampeling enabled, with it enabled it goes down to 50 fps, but i hsve to have it enabled and set the resolution modifier to 75% because when on the 120 fps, i am experiencing massive fps drops(especially when it rains ingame) from 120 to 30fps, sometimes it locks fps to 30 or 60 all by it self and its super game breaking when tryi g to be competitive, this is weird because vsync is disabled.

Another problematic game is kingdome come deliverence, where i noticed the slightest fps boost, game plays same as with 980 ti, 10 fps more max, textures load still incredibly slow like before, i thought that with more gpu performance this would be eliminated.

Anyway so far i tried: reinstall gpu drivers like 3 times, roll back to the older ones, bios update, nothing helps. I am suspecting is probably the cpu bottleneck but i saw many videos where people have better performance with those games. Also cpu usage hits 99% only in AC games, in for honor and KCD only around 70% So my question is: whst else may be the cause of this trouble? I heard that it may be the slow ddr3 ram, or even dx11 or windows7.

Sorry for long post, i tried to be as specific as i could
 
Solution
Karadjgne
Eh. Ram in dual channel has double the bandwidth capacity of single channel. Capacity, not transfer speed. A 4Gb stick can hold @4Gb of data, the bandwidth is how much of that data can be shunted at any 1 time to the cpu, timings is how fast the data is made ready to be moved and speed is how fast the ram works with that data. Basically. So take 2x sticks in single channel, the cpu grabs data from one stick, then the other, as data is made available. In dual channel, all that data is pulled at the same time. You get about a 20% performance benefit from dual over single, but most times you'll not even see that unless the bandwidth is saturated. For most instances, single and dual channel are pretty much equivalent as there's simply way...
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Final question, isnt it possible that the cpu is actually "weared out"? Its almost 4 years old now and did some really heavy lifting since then. During summers it used to get above 70C temperature and was causing shut downs. I dont know what life expectancy these things have, probably long. But could it be possible that the performance degrades after some time?
 
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There may be wear, what was done by the cpu? any overclocking? 70c or there abouts shouldn't cause long term problems and certainly not shutdowns. Maybe your psu was getting too hot. Shutdowns can also be the result of a failing psu. Had an Corsair Hx750w (7yr old unit) beginning to shutdown the pc. Happened twice in one week once while gaming and other just browsing. Replaced it and it's been a month now and it's been good.

http://www.tomshardware.com/answers/id-2210400/4790k-temperatures.html Read InvalidError's reply.

If your cpu was damaged in anyway you would be getting all sorts of consistent problems. Not 120+ fps in one game and suffer in the next.


Asking 400 for might be too much actually not knowing the condition of components.
 
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No overcklocking, when it was really hot outside like 30C plus, ther room temerature with pc on used to get up to 28C, the shut downs occur only while playing games, like assassins creed origins or any stressfull games, well it could be psu but i dont know how to check temperature of that, but i am sure the cpu was getting to 70C, and after that windows shut down the pc to prevent damage. I resolve it to having opend the front "door" of the pc (I have fractal design R5) this way the air circulation got better and didnt happened since. Maybe i have some settings enabled that pc shuts itself after reaching some temps...
 
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I'm telling you it's not a problem with the CPU. I have a 4790K and I get fps through the roof with my gtx 1080 ti. It's similar to your RTX 2080.

[video="https://www.youtube.com/watch?v=jhudkF3GWgQ"][/video]

Battlefield 1 does bottleneck a bit at 1440p but at 4k no bottleck at all.

A small bottleneck isn't worth upgrading an entire system over though.

Your problem lies somewhere else.
 
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Clean install, i wiped my hdd and my ssd with win7 and then installed win 10 on clean ssd. Nope i didnt try pulling the battery out.

Well in games i play the bottleneck seems to be more than 30% sometimes, sure if i would play on 4k monitor than there would be no problem, but i play at 2560x1080 where the bottlneck is very real anyway, i wouldnt complain but having a 1000 euro gpu and droping under 30 fps on this resolution is outrageous.

I did some more benchmarking on kingdim come deliverance and it gets even weirder because here cpu is always around 70/80% but the card wont go above 70% usage. So iam really confused about this, games struggles to run on 30 fps even when there are many npcs, also i noticed that more the fps drop, the gpu usage drops too...

I have no ides whats going on
 
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Also the video that you posted, all the games he showed where linaer games with linear narrow maps, no where to the size of the open world in KCD or AC Odyssey or origins, so we cant really compare that

As i said, the for honor game i play is also has narrow linear maps and the game runs on 130 fps on full ultra without any drops, 99% gpu usage, around 60% cpu usage, so here it really depends on the game that is being played
 
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Just maybe AC is just a beast of a game and part of the problem could be running it in lower a resolution.

https://digiworthy.com/2017/10/29/assassins-creed-origins-cpu-benches/

Still some other problems could still exist with the game or gpu driver. Searching performance tweaks may help the situation.

It does look like with AC in particular more cores/threads can help.

See if this helps

https://steamcommunity.com/app/582160/discussions/0/1480982338963274451/
 
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So i did some more benchmarking, trying all the tweaks you mentioned, unfortunatly the gpu usage didnt go up. Any way here are more information I discovered on the way:

so i was trying to run AC on different resolutions, using the ingame benchmark or just running around the city because thats where the gpu usage is lowest and cpu highest. I noticed that the fps stays same on 1920x1080, 2560x1080 and even 3440x1440 which i set with resolution modifier. The fps its always same (47 average), cpu usage always around 90 to 100, only thing that changes is the gpu usage, on the 1920x1080 i got 60 percent usage, on the 2560x1080 i got 70-80, and on the 3440x1440 i got around 100% gpu usage, all resolutions running the same fps... conclusion: the cpu is unable to feed the information to the gpu fast enough than 47 fps, of course looking at ground/sky puts me to 120+ fps, but thats not how people probably play... so what is the possible reason for cpu to bottleneck when it shouldnt be doing it?

Anyway i was tweaking kingdome come deliverance and found little fix that helped me allot with freezes and stutter, and pushed my fps little higher in the cities, link below:

https://www.nexusmods.com/kingdomcomedeliverance/mods/133?tab=description

what it does its that it limits my cpu to go more than 98% or any other percantege i choose, in this particular game it helped, fps improved little bit, and stuuters are gone, but still the gpu usage sits around 70% while cpu is around 70% too but one core is pushing it to the 100%, where i think the bottleneck happens.

I tried the solution with setting affinity with both games but didnt notice any differance in frames or the usage. Also i used the mod for AC but it didnt help there since i didnt have problems with stutters or freezes in AC to begin with, that only occured in KCD and got fixed by this tweak

SO question is, what can cause that my cpu uderperforms, since according to everyone, i7 4790k should perform way better than in my case, I think we can safely discard the problem with gpu since it performs like it should and has room in usage to perform even better but is limited...

 
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I'll do a test in Assassin's creed odyssey and see if I can get more than 47 average fps. I have the game but have not played it much.
 
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yep, just run the ingame benchmark, so it can be accurate and comparable to mine, since the performance depends highly on the part of the world you play in at the moment
 
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I play with v sync off all the time, didnt limit my fps since i have 75hz monitor, anyway you are getting only 5 more fps which i think is not good too, is your cpu OCed? And did you monitor your cpu and gpu usage? The ingame benchmark does that when pressing F1, did you also try 1920x1080 ultra without modifier? Thats the way you can see how much bottleneck there actually is
 
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1080p be bit more cpu sided then ultra wide so theres no point.

Instead of your fps run wild and go up and down like a yo-yo try limit your fps to your refresh rate. Wont see more than 75fps anyway.

Try this

https://www.guru3d.com/files-details/nvidia-profile-inspector-download.html

Set fps limiter to a frame or two below 75Hz ~ 73/74fps. Click apply button top right corner to make the change.

Turm vsync to on

See how you go with visual smoothness and cpu usage

 
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Well for me it seems that even 4k is cpu sided since i get same 47 fps on all resolution, from FHD to 4k and the fps is same, only gpu usage changes, so thats why i would like to see his results since has same cpu and performance like gpu
 
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The intention of the video i posted previously was to show you how fps and resolution can affect cpu usage. 4k obviously cannot produce 100+fps for cpu usages to be a concern as most load is put toward the gpu. Less resolution = more fps = more cpu usage as the cpu still needs ti ready each frame prior delivery to gpu.

Try limit your fps + vsync, it may give another aspect/opinion.

 
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Yes i watched it, but in my case the fps is same in this particular game no matter what resolution i set, cpu usage is always 90-100 % usage, just gpu usage lowers as the resolution is lower as i said before
 
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How are you determining 4k, via ingame res modifier or dsr? Could use no ingame modifier and try dsr instead and set the resolution given ingame. Doesn't make sense for 1080p wide and 4k getting the same fps. But i haven't played this game so couldn't say how effective resolution modifier is. Unless modifier you actually meant Nvidia dsr.
 
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Ingame modifier might be adding additional cpu usage. Could make sense.

Try dsr instead and try Nvidia Inspector and cap fps to 73/74 not 75. With vsync on adds input lag but capping fps lower than refresh acts like a phantom buffer similar to triple buffer in Nvidia but imo works better and little to no input lag.
 
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So i have great news. Finally found out what caused the "bottleneck" if it can be called that. Funny thing is that i stuble upon it by accident, I was just watching youtube video with guy building a pc and noticed that he puts his 2 RAM sticks to every other slot. Since i didnt build my pc and my RAMs were under my gaint aircooler i wondered in what slots are MY RAMs, so i opened the case, looked under the aircooler and there it was. MY RAMS WERE IN SLOTS NEXT TO EACH OTHER. I was stunned. So I moved the RAM stick to the next slot. Still i didnt know this actually effectet anything. I decided to run AC Odyssey and shit me not, the FPS went from 48 to 70 in some city areas. The GPU usage was finnaly on 90+% instead the 60% like before, unfortunatly the CPU usage was still around 95% and in some city areas the CPU indeed started to bottleneck and brought my GPU to around 85% usage droping frames little bit under 60 fps. Still this relevation suprises me and confuses me at the same time. I have 4 years this pc and after 4 years i stumble upon this almost unnoticable thing. I have no idea what my RAM has to do with my CPU and GPU usage, but now i guess it has to do something alot. Its weird because my PC still registered both RAM sticks and i had 16gb accesible memory even when the on ram stick was in wrong slot, also the ran on right clock speed. So if someone could explain me what actually happened when i corrected the RAM slots, i would be even happier. Anyways thx for all the help you provided me here, guess none of you expected this to be an issue...
 
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