Holy smokes this works for the AVX related specific prologue crashes. Never used a hexadecimal editor before so it was a bit tricky, but thanks! How the dickens did you figure this out? I hope they can release a real fix soon. If we run into trouble, how hard is it to put these values back to normal, and will they fix themselves if we validate files?Game crashing on old CPUs: possible fix
If you happen to have an old CPU you maybe having this crash:
Expression: EXCEPTION_ILLEGAL_INSTRUCTION (0xC000001D)
The game is trying to use a feature you don’t have: AVX.
At the beginning playing corpo when you sit it crashes. A possible temporal solution while they fix this issue is to remove this part of code:
Edit Cyberpunk2077.exe with a hexadecimal editor and search for
554881ECA00000000F2970E8
Change the first byte to C3 (return from the function):
C34881ECA00000000F2970E8
Please note this fix is extremely simplistic and naïve. Moreover, it could crash the game later. This change seems to fix this crash and you can continue playing the game. I have only tested a few minutes more.
FAQ: Why are they using AVX?
They are not doing it on purpose, it is probably the default configuration of the compiler.
Only thing that is infuriating is that this Saint fixed the issue before a major 3A dev team...without resorting to GB of patches but a simple byte swap.....seriously CDPR...za duzo czystej obaliliscie wczoraj po premierze wszyscy na kacu jeszcze? (translation: hey CDPR devs too much straight vodka after the premier , everyone still hangover?)I LOVE YOU!!!!!!!!!!!!!!!!!!!!
did you make a backup of the original file? if not just look for the new value and change it back to 55 instead of C3 should be back to originalHoly smokes this works for the AVX related specific prologue crashes. Never used a hexadecimal editor before so it was a bit trick, but thanks! How the dickens did you figure this out? I hope they can release a real fix soon. If we run into trouble, how hard is it to put these values back to normal, and will they fix themselves if we validate files?
Damn it! That hack works for me - thank you.Game crashing on old CPUs: possible fix
If you happen to have an old CPU you maybe having this crash:
Expression: EXCEPTION_ILLEGAL_INSTRUCTION (0xC000001D)
The game is trying to use a feature you don’t have: AVX.
At the beginning playing corpo when you sit it crashes. A possible temporal solution while they fix this issue is to remove this part of code:
Edit Cyberpunk2077.exe with a hexadecimal editor and search for
554881ECA00000000F2970E8
Change the first byte to C3 (return from the function):
C34881ECA00000000F2970E8
Please note this fix is extremely simplistic and naïve. Moreover, it could crash the game later. This change seems to fix this crash and you can continue playing the game. I have only tested a few minutes more.
FAQ: Why are they using AVX?
They are not doing it on purpose, it is probably the default configuration of the compiler.
Try this before posting for the AVX Crash this is a confirmed FIX ATM![]()
How did you save the file afterwards?Confirmed working! I am outside the bar!!!!
You're a F***ING hero man!!! I used https://hexed.it/ to edit the .exe
THIS FIXED THE AVX ISSUE!
OMG THANK YOU!!!
I dont have 554881ECA00000000F2970E8 in my file then i open Cyberpunk2077.exe in hexadecimal editor.Game crashing on old CPUs: possible fix
If you happen to have an old CPU you maybe having this crash:
Expression: EXCEPTION_ILLEGAL_INSTRUCTION (0xC000001D)
The game is trying to use a feature you don’t have: AVX.
At the beginning playing corpo when you sit it crashes. A possible temporal solution while they fix this issue is to remove this part of code:
Edit Cyberpunk2077.exe with a hexadecimal editor and search for
554881ECA00000000F2970E8
Change the first byte to C3 (return from the function):
C34881ECA00000000F2970E8
Please note this fix is extremely simplistic and naïve. Moreover, it could crash the game later. This change seems to fix this crash and you can continue playing the game. I have only tested a few minutes more.
FAQ: Why are they using AVX?
They are not doing it on purpose, it is probably the default configuration of the compiler.
Try this before posting for the AVX Crash this is a confirmed FIX ATM![]()
Hello Guradem, first of all thank you for the reply and for the tip.Try turning on SLOW HDD MODE in the gameplay options. I had exactly the same issue as you and it seem to fix it for me. It also doesn't seem to affect load performance.
THANK YOUGame crashing on old CPUs: possible fix
If you happen to have an old CPU you maybe having this crash:
Expression: EXCEPTION_ILLEGAL_INSTRUCTION (0xC000001D)
The game is trying to use a feature you don’t have: AVX.
At the beginning playing corpo when you sit it crashes. A possible temporal solution while they fix this issue is to remove this part of code:
Edit Cyberpunk2077.exe with a hexadecimal editor and search for
554881ECA00000000F2970E8
Change the first byte to C3 (return from the function):
C34881ECA00000000F2970E8
Please note this fix is extremely simplistic and naïve. Moreover, it could crash the game later. This change seems to fix this crash and you can continue playing the game. I have only tested a few minutes more.
FAQ: Why are they using AVX?
They are not doing it on purpose, it is probably the default configuration of the compiler.
Game crashing on old CPUs: possible fix
If you happen to have an old CPU you maybe having this crash:
Expression: EXCEPTION_ILLEGAL_INSTRUCTION (0xC000001D)
The game is trying to use a feature you don’t have: AVX.
At the beginning playing corpo when you sit it crashes. A possible temporal solution while they fix this issue is to remove this part of code:
Edit Cyberpunk2077.exe with a hexadecimal editor and search for
554881ECA00000000F2970E8
Change the first byte to C3 (return from the function):
C34881ECA00000000F2970E8
Please note this fix is extremely simplistic and naïve. Moreover, it could crash the game later. This change seems to fix this crash and you can continue playing the game. I have only tested a few minutes more.
FAQ: Why are they using AVX?
They are not doing it on purpose, it is probably the default configuration of the compiler.
This is the way.Damn it! That hack works for me - thank you.
Holy crap, I just did that and it worked for me. AmazingGame crashing on old CPUs: possible fix
If you happen to have an old CPU you maybe having this crash:
Expression: EXCEPTION_ILLEGAL_INSTRUCTION (0xC000001D)
The game is trying to use a feature you don’t have: AVX.
At the beginning playing corpo when you sit it crashes. A possible temporal solution while they fix this issue is to remove this part of code:
Edit Cyberpunk2077.exe with a hexadecimal editor and search for
554881ECA00000000F2970E8
Change the first byte to C3 (return from the function):
C34881ECA00000000F2970E8
Please note this fix is extremely simplistic and naïve. Moreover, it could crash the game later. This change seems to fix this crash and you can continue playing the game. I have only tested a few minutes more.
FAQ: Why are they using AVX?
They are not doing it on purpose, it is probably the default configuration of the compiler.
Try this before posting for the AVX Crash this is a confirmed FIX ATM![]()
Rename it cyberpunk2077.exe silly LMFAO it's legit the fix using the hex editorThe nexus mod did not work for me. Game crashed immediately for me then
In My program it cant find the 554881ECA00000000F2970E8.Game crashing on old CPUs: possible fix
If you happen to have an old CPU you maybe having this crash:
Expression: EXCEPTION_ILLEGAL_INSTRUCTION (0xC000001D)
The game is trying to use a feature you don’t have: AVX.
At the beginning playing corpo when you sit it crashes. A possible temporal solution while they fix this issue is to remove this part of code:
Edit Cyberpunk2077.exe with a hexadecimal editor and search for
554881ECA00000000F2970E8
Change the first byte to C3 (return from the function):
C34881ECA00000000F2970E8
Please note this fix is extremely simplistic and naïve. Moreover, it could crash the game later. This change seems to fix this crash and you can continue playing the game. I have only tested a few minutes more.
FAQ: Why are they using AVX?
They are not doing it on purpose, it is probably the default configuration of the compiler.
It was a bit tough for me too, had to mess around with the search function in the program I was using. Perhaps someone can recommend a good Hexademical editor and some simple step by step directions.In My program it cant find the 554881ECA00000000F2970E8.