Question / Help Instant 50% FPS loss after opening OBS

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youngmulti

New Member
Hey so i recently bought Hitman 2 and ive been playing it quite a while. I manage to get solid avg of 60 fps.
I wanted to stream it but when i open OBS i get instant performance loss even without streaming/recording.
Game is unplayable in some moments.. from 60-70 fps i get like 30-40 fps and the problem is gone when i close obs.
Same with other games. I tested CS:GO where i have like 300 fps - same issue, i open obs and it drops to 80-120 fps, sometimes even to 60.

My specs:
geforce 1080 ti
i7-8700k 3.70 ghz
win 10 home 64 bit
16gb ram
asrock z370 extreme4
monitor acer kg271 b 240hz 1080p

here u have my log https://obsproject.com/logs/DGae6qouuXJSJoai
and my obs (64 bit) settings:
https://gyazo.com/ae3c6b68ee250022e0231133d1d98bae

https://gyazo.com/f3bdf20885066609ce53e6de1acd3b8d

https://gyazo.com/1de2806404bab76ae8514c63fbe5ca0a

my internet speed 500 down / 50 upload
here u have some screens from game, the same location
with obs:

6872482cd1e82edca28dee77f4e44d0a.png

https://gyazo.com/6872482cd1e82edca28dee77f4e44d0a

without obs


f7296b99a297e92f4f9761da82347b0a.png

https://gyazo.com/f7296b99a297e92f4f9761da82347b0a

i have newest drivers for gpu, win 10, cpu etc.
 
Y

youngmulti

New Member
R1CH said:
Click the ? next to the Bus Interface and run the render test. If the reading does not show @ x16 3.0 then your card is in the wrong slot.

Also your FPS overlay may interfere with game capture, see https://obsproject.com/wiki/Known-Conflicts
Click to expand...
I had the same issue without fps overlay too, i turned it on to make a screenshoot.
Ok i will run the render test. How long i should wait? it gonna close automaticly? because its going for 4 minutes
 
R

R1CH

Forum Admin
Developer
Just a second is enough, if the reading didn't change from @ x8 2.0 then your GPU is in the wrong slot. If that's the case, check your motherboard manual to see which slot it should be in (usually the top one closest to the CPU).
 
R

R1CH

Forum Admin
Developer
That should be x16 for best performance. You'll need to physically move the GPU to the top slot in your motherboard (PCIE2).

CAPxxOy.png
 
Y

youngmulti

New Member
R1CH said:
That should be x16 for best performance. You'll need to physically move the GPU to the top slot in your motherboard (PCIE2).

CAPxxOy.png
Click to expand...

Ok i will check this. So right now its PCIe x16 3.0 @ x8 3.0 and after succefully instaled it should say PCIe x16 3.0 @ x16 3.0 ?
 
R

R1CH

Forum Admin
Developer
Correct. The first is what the GPU is capable of, the second is what it's currently using.
 
D

DeMoN

Member
x8 3.0 is fast enough to lose 0,0000% performance on a RTX 2080 Ti.
My datapath vision sc-dp2 capture card needs a 2.0 x8 slot
So it is on the 2nd gpu slot.
The z390 chipset then splits both gpu slots to be 3.0 8x instead 3.0 16x.
I did benchmark before after - the performance is 100% identical. You can also read it up on the internet that 3.0 x8 is fast enough for a graphics card.
If you can fix it to be x16 go for it - but if not - it doesnt matter at all.
 
D

DeMoN

Member
It is enough for both. yes.
The card is absolutely not impacted by it.
I told you I use such a setup with a RTX 2080 ti. No difference to x16 at all.
His problem must be elsewhere. And yes also OBS works just fine.
 
D

DeMoN

Member
youngmulti said:
BUT, the problem is still the same.
Click to expand...
Of course its the same. But the guys here apparently cant imagine that x8 is enough for a graphics card :P
I didnt expect any improvement ^^
But since the x16 is usable for you because using only one card (not like me in addition a capture card) it makes sense to use the x16 - even when the card doesnt need the x16 at all.
 
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