Mickey: [Help] Persistent Microstutters / HRyzen 7 5800X + RX 7800 XT (B450M S2H)

System:


5800X | B450M S2H (F67d) | RX 7800 XT MERC319 | 32 GB DDR4-3200 | MSI A750BN 750W Bronze | Kingston SNV3 1TB | Win 11 Pro



Issue:


Games like Cyberpunk and Dota 2 stutter badly when GPU load spikes — FPS drops to ~20, audio crackles.


CPU-only stress tests = stable.


OCCT Power test instantly reproduces lag.


LatencyMon shows huge ISR/DPC delays (HDAudBus.sys, ndis.sys, dxgkrnl.sys).

Suspect PSU

Temps are fine (CPU <70 °C, GPU <65 °C).


Would upgrading PSU (e.g. Corsair...

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