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Fallout 4 Anomaly

geordiejc

geordiejc

geordiejc

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Joined
1 Nov 2013
Posts
854
Hi all,

I've come across an anomaly which i can't explain.

https://www.dropbox...._xFyRMOJra?dl=0

^^ in the drop box are 3 x pictures which show my FPS @ 1080p, 1440p ^ 2160p at the exact same loading point. I took these pictures after the game had loaded and allowed 1 minute for it to 'settle in'

1920 x 1080 = 53fps GPU 47% CPU 60%
2560 x 1440 = 56fps GPU 63% CPU 65%
3840 x 2150 = 52fps GPU 99% CPU 69%

How on earth can i get such tightly knitted FPS !

Its clear the larger the resolution the more the GPU/CPU is increasing in useage, however its puzzling me why i cant hit 60fps across any of the 3 resolutions.

Spec :

i5 4670k 4.2Ghz | Evo 212 | MSI Z87 G45 | EVGA SC ACX 2.0 980 Ti | Hyper X 16GB 1600 | Samsung 840 Pro 128GB | Crucial MX100 128GB | Seagate 2TB | XFX PRO (Black Edition) 850W | Define R4 case | Acer XB280HK (G-SYNC)

Ideals ?
 
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geordiejc said:
Hi all,

I've come across an anomaly which i can't explain.

https://www.dropbox...._xFyRMOJra?dl=0

^^ in the drop box are 3 x pictures which show my FPS @ 1080p, 1440p ^ 2160p at the exact same loading point. I took these pictures after the game had loaded and allowed 1 minute for it to 'settle in'

1920 x 1080 = 53fps GPU 47% CPU 60%
2560 x 1440 = 56fps GPU 63% CPU 65%
3840 x 2150 = 52fps GPU 99% CPU 69%

How on earth can i get such tightly knitted FPS !

Its clear the larger the resolution the more the GPU/CPU is increasing in useage, however its puzzling me why i cant hit 60fps across any of the 3 resolutions.

Ideals ?
Click to expand...

Looks very much like a CPU Bottleneck, what CPU do you have?
 
Classic cpu bottleneck, Cranking up settings to get the same fps happens as well. Your GPU usage is lowish because your CPU can not feed it fast enough i bet. If you look at what you posted, Your GPU usage goes up almost double with the 4K resolution but your CPU only rises 9%. this is why you will not hit 60fps you need to either overclock to get 60 minimums or drop settings down.
 
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HA!

will someone please tell me why the CPU is not 100% - i'd understand if it was a bottlneck if it was maxing out - but 60 - 70% is not a bottleneck - can someone explain ?? sorry im not trying to be a pain in the arse just trying to understand!

Cheers!
 
Edited hope it is clear now. CPU usage is not an exact science. Drop your settings to hit the 60.0 minimums.
 
geordiejc said:
i5 4670k - the CPU usage is between 60 - 70% as above.

This can't be a CPU bottleneck if its 60 - 70% usage on all 4 cores?
Click to expand...

It looks like a classic CPU Bottleneck, Dawcalls only use 1 thread so the full CPU load would not be 100%. if that drawcall thread is saturated it will reduce FPS even if other cores / threads are at 0.

Tho I'm very surprised you have a CPU bottleneck with a 4670k, i'm getting constant 60 with V-Sync on @ 1080P, locked solid and i'm running an AMD FX-8 core. don't know how high it would go with V-Sync off, might try it tomorrow.

PS: can you overclock the CPU more?
 
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I've checked and all 4 cores are running between 50 - 70% on all resolutions, and its got me perplexed.

If all cores were 100% - then it would be logical to say its a CPU bottleneck, but in this case none of the cores are at 100%.

wait there i'll post another image showing individual cores :)
 
geordiejc said:
HA!

will someone please tell me why the CPU is not 100% - i'd understand if it was a bottlneck if it was maxing out - but 60 - 70% is not a bottleneck - can someone explain ?? sorry im not trying to be a pain in the arse just trying to understand!

Cheers!
Click to expand...

Game engines aren't perfectly optimised to split the workload evenly over all available cores. So you might get the heaviest work maxing out one core, but work handed off to other cores only use ~50% or so (example) - this gets averaged out across all cores to 60-70% "CPU" load, but it doesn't tell the whole picture.

It's also possible that it's an engine bottleneck - poor optimisation or bugs under certain conditions limiting throughput.
 
geordiejc said:
I've checked and all 4 cores are running between 50 - 70% on all resolutions, and its got me perplexed.

If all cores were 100% - then it would be logical to say its a CPU bottleneck, but in this case none of the cores are at 100%.

wait there i'll post another image showing individual cores :)
Click to expand...

Ok. :)
 
The engine will never use 100% because it aint properly threaded, It is grabbing everything possible at the minute i suspect and it still just aint quite enough. Your CPU has 4 threads at 4200mhz i think ideally most people are 200-300mhz higher and the ram is only 1600mhz. Again that memory is probably not far off twice as slow as a 2400mhz kit with timings tweaked. If you expect 100% usage on all four cores from what is essentially modded Skyrm forget it.


I remember playing it in Jan (Skyrm maxed) with my 4770k 2400mhz ram and a 980 @ 1550mhz and i still dropped down to 90 from 120 thanks to the CPU. The engine requires quite a lot of brute force from a cpu i would guess it does not even care about core and would instead gobble down ram and frequency like no tomorrow.
 
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Untitled.jpg


As you can see all cores are betwen 60 - 73%

This only happens in Diamond city or other huge towns when there's a lot going on. everwhere else its 60 fps constant.
 
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Rofflay said:
The engine will never use 100% because it aint properly threaded, It is grabbing everything possible at the minute i suspect and it still just aint quite enough. Your CPU has 4 threads at 4200mhz i think ideally most people are 200-300mhz higher and the ram is only 1600mhz. Again that memory is probably not far off twice as slow as a 2400mhz kit with timings tweaked. If you expect 100% usage on all four cores from what is essentially modded Skyrm forget it.


I remember playing it in Jan (Skyrm maxed) with my 4770k 2400mhz ram and a 980 @ 1550mhz and i still dropped down to 90 from 120 thanks to the CPU. The engine requires quite a lot of brute force from a cpu i would guess it does not even care about core and would instead gobble down ram and frequency like no tomorrow.
Click to expand...

Would an i7 4770k/4790k improve the games performance ?

i'd sell my CPU and buy a 2nd hand one if thats the case.
 
Would an i7 4770k/4790k improve the games performance ?

i'd sell my CPU and buy a 2nd hand one if thats the case.
Click to expand...

Well I only had my dips in towns too and my CPU and GPU was a joke for Skyrm. Outdoors i had a butter smooth 120.00 fps all the time as soon as a dragon or double dragons like i got the frames dives down to 90 or less. The same is true of an NPC in a city. Fallout 4 = modded Skyrm the same thing applies this is why i am going to wait at least 12 months.


I would not reccomend upgrading to a 4790k no, I would want Skylake with 16GB DDR4 3200mhz+ for these bad coded games.
 
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The big cities are known to tank FPS.

Happens to me with a 5820k and 980Ti. I can noticeably feel the FPS drop to 40s sometimes. Turning down shadow detail fixes it.

Terribly optimised game basically.
 
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