AMD Ryzen 7 7800X3D (8C/16T, PBO Curve -20)NVIDIA GeForce RTX 4080 SUPER 16GB (16GB GDDR6X)32GB DDR5-6000MHz CL30 (EXPO Profile 1)Windows 11 Pro 64-bit (Build 26100.2161 - 24H2)NVIDIA Game Ready 565.90 WHQLCapFrameX v1.7.2 & PresentMon v2.0 (Hook: D3D11/D3D12)-
Verify file integrity: Steam Library -> Deadlock -> Properties -> Installed Files -> Verify integrity of game files.
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Purge DirectX shader cache: run cleanmgr.exe, select 'DirectX Shader Cache', and delete; do not touch loginusers.vdf.
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For 0xC0000005 access violations: disable XMP/EXPO in UEFI and update Intel 13th/14th Gen microcode to the latest BIOS Vcore baseline.
Universal Error Code & Hardware Fault Triager for Deadlock
NTSTATUS 0xC0000005 represents an invalid pointer reference. In 70% of cases, unstable DDR4/DDR5 secondary timings or Intel 13th/14th Gen CPU microcode voltage degradation trigger this fault.
Engine Throughput vs Frame Pacing for Deadlock
DirectX 11 vs Vulkan renderer path in Source 2 post-patch
Valve ships DirectX 11 as the Windows-native default; Vulkan remains unsupported on Windows and is not validated against the current Deadlock build.
Some benchmarkers report lower CPU submission overhead under Vulkan on Linux/Steam Deck, but on Windows the path is unmaintained and frequently triggers device-removal crashes.
Universal 4-Tier Diagnostic Protocol for Deadlock
Verify Steam package signatures via game properties. Clear corrupted runtime shader caches from disk cleanup to rule out pipeline compilation hangs.
Inspect Windows Application Error logs to identify whether the faulting module is ntdll.dll (memory paging), d3d11.dll, or display driver timeouts (TDR).
Run Windows Memory Diagnostic (mdsched.exe) or TestMem5. Aggressive memory overclocking or unstable secondary timings are the primary root cause of 0xC0000005 violations.
When event traces point to nvlddmkm.sys or display crashes, execute a clean driver sweep in Windows Safe Mode using DDU, then verify GPU/CPU throughput margins.
Root Cause Telemetry Analysis
Post-patch Deadlock crashes on Source 2 Windows-native DirectX 11 typically manifest as 0xC0000005 access violations during pipeline state object (PSO) creation or shader compilation. The engine's sub-allocator desyncs when stale DirectX shader cache entries from the prior build are reused against the new PSO layout, producing an invalid pointer dereference in the D3D11 submission thread. Secondary causality is memory-subsystem instability: DDR4/DDR5 XMP/EXPO profiles that were marginally stable on the previous build now fault under the new allocation pattern, and Intel 13th/14th Gen parts with pre-microcode Vcore margins exhibit elevated voltage transients that surface as launch-time access violations. Launch failures without a crash dialog usually indicate a corrupted shader cache or an interrupted patch delta, not a driver fault.
EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be read.
PROCESS_NAME: deadlock.exe
STACK_TEXT:
00 00000045`e89fe810 00007ff8`518a4120 : ntdll.dll!RtlpAllocateHeap+0x12a
01 00000045`e89fe940 00007ff8`3921b045 : deadlock+0x45b045 (Shader allocator contention)
02 00000045`e89fea00 00007ff8`50147974 : KERNEL32!BaseThreadInitThunk+0x14
Step 1: Purge DirectX Shader Cache and Verify Patch Integrity
Stale PSO cache entries from the pre-patch build are the primary trigger for launch-time access violations. Purge the DirectX shader cache via the Windows Disk Cleanup utility, then re-verify the patch delta through Steam. Do not delete loginusers.vdf or any Steam credential file; that invalidates Steam Guard sessions.
cleanmgr.exe /d C:
# Select 'DirectX Shader Cache' -> OK
# Steam -> Library -> Deadlock -> Properties -> Installed Files -> Verify integrity of game filesStep 2: Validate Memory Timing Stability (XMP/EXPO) for 0xC0000005
If the crash persists with a 0xC0000005 signature in the Windows Event Log, test the memory subsystem at JEDEC defaults. Disable XMP/EXPO in UEFI and re-run the launch. A stable launch at JEDEC confirms the XMP/EXPO profile is the fault domain; re-enable at a reduced frequency or relaxed tRFC/tFAW. This is a physical-reality check, not a placebo.
# UEFI: disable XMP/EXPO -> save & exit
# Re-launch Deadlock; if stable, XMP/EXPO profile is marginal
# Re-enable at -200 MT/s or relaxed primary timingsStep 3: Apply Intel 13th/14th Gen Microcode Vcore Baseline
Intel 13th/14th Gen CPUs with pre-update microcode exhibit elevated Vcore transients that surface as access violations under Source 2's shader compilation load. Update to the latest BIOS containing the Intel microcode Vcore margin fix, then confirm the engine launches with the verified safe arguments only.
# Launch options (Steam -> Deadlock -> Properties -> General):
-fullscreen -nojoy
# Do NOT add: , , `` (⚠️ Deprecated), `` (⚠️ Deprecated)+cl_forcepreload 1)
Deprecated by Valve. Forcing preloading exhausts system RAM and spikes frame variance during asset streaming. Keep default (0).
-high)
Forces Windows scheduler to prioritize game threads over core input drivers, causing erratic mouse jitter and frametime micro-stutter on modern hybrid CPUs.
-vulkan)
On native Windows installations, DirectX 11/12 pipelines offer superior driver maturity. Forcing Vulkan can trigger severe shader compilation stuttering unless on Linux/SteamDeck.
mat_queue_mode)
Legacy Source 1 multi-threading switch. Obsolete in modern engines where task graphs and thread pools are automatically balanced.
Objective Hardware Bottleneck & Throughput Profiler for Deadlock
Calculates genuine compute throughput. If your rig is optimal, we explicitly advise against spending money on upgrades.
Your selected CPU and GPU operate within optimal throughput equilibrium. Framerate delivery is limited purely by game engine tickrate rather than hardware starvation. Save your money!
Parameter Flagged:
+cl_forcepreload 1)
Deprecated by Valve. Forcing preloading exhausts system RAM and spikes frame variance during asset streaming. Keep default (0).
Engineering Finding: Deprecated by Valve. Forcing preloading exhausts system RAM and spikes frame variance during asset streaming. Keep default (0).
Authoritative Action: Remove this parameter entirely.
Source: Official Technical BaselineParameter Flagged:
-high)
Forces Windows scheduler to prioritize game threads over core input drivers, causing erratic mouse jitter and frametime micro-stutter on modern hybrid CPUs.
Engineering Finding: Forces Windows scheduler to prioritize game threads over core input drivers, causing erratic mouse jitter and frametime micro-stutter on modern hybrid CPUs.
Authoritative Action: Remove this parameter entirely.
Source: Official Technical BaselineParameter Flagged:
-vulkan)
On native Windows installations, DirectX 11/12 pipelines offer superior driver maturity. Forcing Vulkan can trigger severe shader compilation stuttering unless on Linux/SteamDeck.
Engineering Finding: On native Windows installations, DirectX 11/12 pipelines offer superior driver maturity. Forcing Vulkan can trigger severe shader compilation stuttering unless on Linux/SteamDeck.
Authoritative Action: Remove this parameter entirely.
Source: Official Technical BaselineParameter Flagged:
mat_queue_mode)
Legacy Source 1 multi-threading switch. Obsolete in modern engines where task graphs and thread pools are automatically balanced.
Engineering Finding: Legacy Source 1 multi-threading switch. Obsolete in modern engines where task graphs and thread pools are automatically balanced.
Authoritative Action: Remove this parameter entirely.
Source: Official Technical Baseline