Quick Answer
A Stellar Blade anti-cheat error on a RX 7800 XT is almost always a software handshake problem, not a fault with the 16GB card. The fix order is: run the game as administrator, repair the anti-cheat service, allow it through Windows Defender Firewall, and reinstall Adrenalin 25.x cleanly. None of these touch the RX 7800 XT itself, which at around R12,500 far exceeds Stellar Blade's needs.
Why the anti-cheat trips on a RX 7800 XT
Stellar Blade pairs a PSN account login with a kernel-level anti-cheat driver that must initialise before the game window opens. On a RX 7800 XT rig the common triggers are a blocked service, an overlay hooking the process, or a mismatched system clock breaking the PSN handshake. Verify your Windows date and time are set automatically, sign into the PlayStation app once, then close Discord, MSI Afterburner, and RGB tools for a clean boot before retrying.
Repair steps that clear the error on a RX 7800 XT
In Steam, use Properties, Installed Files, Verify Integrity to repair the anti-cheat files. Then run the installer's repair option for the anti-cheat service as administrator, and add both the game and the anti-cheat executable to Windows Defender Firewall exceptions. Finally do a clean Adrenalin 25.x install with DDU in Safe Mode; a stale driver can break the kernel handshake on a RX 7800 XT even though the card has plenty of power.
FAQ
Is the anti-cheat error caused by my RX 7800 XT?
No. A RX 7800 XT has no bearing on the anti-cheat handshake, which is a service, firewall, and account issue. The card only matters once the game launches and you are tuning frame rate.
Does Stellar Blade run on AMD GPUs in SA?
Yes, Stellar Blade runs on both NVIDIA and AMD cards; a RX 7800 XT is fully supported. Anti-cheat errors affect both brands equally and are fixed with the same service-and-firewall steps.
Will a clean Windows install fix the anti-cheat error?
Usually it is not needed. A Adrenalin 25.x clean install plus firewall exceptions and an admin repair clears most cases on a RX 7800 XT without wiping your system.
Pro Tip
Set Windows clock to sync automatically and run Stellar Blade as administrator first; a wrong system time alone breaks the PSN anti-cheat handshake on an otherwise healthy RX 7800 XT.
