The ACC CPU Benchmark Thread

Coś jest nie tak :-( Zmieniłem 5600x na 5800x3d iw ACC są stosowane na tych ustawachniach.

 

V-sync on?

 

No

 

What resolution, 4k?

General question, is the CPU difference on 4k not that big? I would think the GPU is far more important than the CPU like whether it is a ryzen 5600X or 5800X3d.

 

triple 2k .but I think the card is too weak . The settings were Epic

 

3080 does 100 + fps at 5760x1080 so I don't think that's the problem at 2k.

 

Then put 3x 2560x1440 into the calculator and think again.
7680x1440 is a whole different story.
11 Mio pixels vs 6.2 Mio pixels.
It's 178% of the pixels.
100 fps devided by 1.78 = 56 fps

He got 57.7-60 fps.

 

I don't know what happened, either someone edited their post or i had a aneurysm, i remember reading someone saying they got 100 fps at 1440p triples. I must have mixed up posts or threads or used someone else's brain, lol

 

It has been mentioned before, that disabling HT or just using the physical cores of your CPU by launching ACC with an affinity parameter can improve the performance in CPU limited scenarios.

I did 6 benchmarks with 39 AI, spectating the AI car in position 25 during the start sequence


In each run, restricting ACC to the physical CPU cores (5900X) got a better result. Also the fps percentiles were consistently better.




This can be achieved by just simply running ACC directly with a batch file instead of clicking it on Steam.
Create a file "acc.bat", and copy the code below:

Code:

cd "C:\Program Files (x86)\Steam\steamapps\common\Assetto Corsa Competizione\AC2\Binaries\Win64\"
start /AFFINITY 0x55555555 AC2-Win64-Shipping.exe

The affinity parameter is set for 16 cores. If your CPU has less, Windows just ignores the extra numbers, so this still works. In case you still want to match it to your CPU, each 5 in the affinity parameter represents 2 physical cores. So a 8 core CPU would be 0x5555.


If anyone has a 5800X3D and wants to test, please share the results

 

I just installed a 5800X3D and an RX 7900XT... OMG!

Do you want me to bench?

 

Hi mate nice job with the testing . How you create this acc.bat file ? Just with notepad (simple text document) or somewhere trough windows ?

 

Yeah, you create a text-file, copy&paste the "code" in it and save it as .bat instead of .txt.
Or you save it as .txt and then rename it to .bat
Then simply double click the .bat and it should work.

For me, ACC starts, but the affinity won't apply for some reason.
There seem to be ways to apply the affinity while ACC is running though and you can test this instantly without restarting ACC all the time.
I want to get this to run for myself too, so I'll just write down my own process of getting it to work here:

With a little help from ChatGPT, the powershell script for this is easily created.
It's sadly only possible with powershell, not via CMD, but powershell has some security restrictions to stop any scripct from executing.

However you can bypass the powershell restrictions by executing the .ps1 via a .bat file.
Not even admin-rights needed from my testing.

The .bat and .ps1 should be in the same folder, then you can do this:


.bat file:
set "script_path=%~dp0set_affinity.ps1"
powershell.exe -ExecutionPolicy Bypass -File "%script_path%"
pause

(delete the pause at the end and add @Echo off as first line after it's working successfully)
(this path thing is needed so the bat file finds the script right next to itself and then tells powershell where it is)

.ps1 file: (DON'T put .exe into the name. No idea why, but it stops working)
$process = Get-Process -Name "AC2-Win64-Shipping"
$process.ProcessorAffinity = 0x155

The hex-number can be done via an online binary to hex converter. It's quite simple.
In binary, each bit = one CPU thread.
If you have 2 cores with HT, the default would be, binary: 1111 (all threads used)
What you want: 0101 (only 1 thread per real core being used)
For 6 cores + HT it's this: 010101010101
0 = being used
1 = not used
0x at the beginning defines the number as hex.
So 0101 equals 55 in hex, but it needs to be 0x55.

The number I used successfully on my laptop with 4C/8T: 0x55
hexnumber for 6 cores + HT= 0x155
https://calculator.name/baseconvert/binary/hexadecimal/0101010101

For some reason, 0x5555 gives an error. The number needs to fit perfectly in my case. Maybe due to Win 11, no idea.

After running this, you should see the affinity applied in TaskManager by rightclicking on the process and clicking on "Affinity". If it's not there, you first need to click on "Details" and then again rightclick on the process and find "Affinity".

I just tested this for Telegram on my laptop:

 

Thanks for the info sounds like a lot of hustle just for few frames

 

Yes and no. I wanted to know this in general to set the affinity for all kinds of programs. But I'm coding a little bit in my job so I totally get that it's not worth it for everyone.
I attached my working files to this post. Just download them and put them anywhere into the same folder.
- Run ACC and when you're in the main menu (or later): double click the .bat.
- If there's no error message, it's working.
- Now right click the .bat, open it with the editor, wordpad, notepad++, whatever and delete the "pause" at the bottom.

I had to add ".txt" to both files to make them uploadable here. Delete that too, ofc.

I got to test this now at the PC with ACC. Here are a few infos for who's interested:

Needs to be: 0x555 !! I forgot a pair of 01...
So:
.ps1 file: (DON'T put .exe into the name. No idea why, but it stops working)
$process = Get-Process -Name "AC2-Win64-Shipping"
$process.ProcessorAffinity = 0x555

As I said, needs to be 0x555.
I confirm, that it really needs to be exactly 0x555 and not 0x5555 or more 5's.
In short: half the amount of 5's that you have real cores.

If you have more than 5 cores, you won't gain any fps by having more cores.
In theory, you could increase your minimum fps by forcing ACC to the first 5 cores and stuff like Discord, SimHub etc. to the 6th core.
And a little info for who's interested: It's not that "0" = used, "1"= not used! The cores are backwards in the binary number. Just learnt this.

So for ACC to be forced on the first 5 real cores, on my 7600X, it would be:
00 01 01 01 01 01 => 0x554
and for SimHub, Discord etc.:
11 00 00 00 00 00 => 0xC00 (C zero zero)

 

Thanks mate i will try

 

yes, please