I'm troubleshooting a major gaming performance problem with an i5-12600K, RTX 4070 Ti Super, Gigabyte B660 DS3H AX DDR4, and 32GB of DDR4-3600 RAM in slots 2 and 4. With XMP enabled at 3600 MT/s, games such as Marvel Rivals and Deadlock ran above 120 FPS, but I started getting MEMORY_MANAGEMENT blue screens. After lowering the memory speed to 3200 MT/s, the crashes stopped and a short TM5 test passed, but gaming performance collapsed to roughly 40–60 FPS, sometimes dropping to 10 FPS. GPU usage is only around 35–50%, while the P-cores show high usage. The GPU still boosts to about 2835 MHz and runs at PCIe 4.0 x16 under load. I also confirmed that CPU cores are active, restored the GPU to stock settings, cleared game configs, and re-enabled Resizable BAR and Above 4G Decoding after the BIOS reset. Could a BIOS memory retraining issue, CPU power limit, faulty RAM, or another motherboard setting explain this? Should I reset the BIOS completely, update it, run a driver cleanup, or test different memory?
3 Answers
It’s worth checking the board’s VRM and CPU behavior under load. That motherboard has relatively limited VRM cooling, so monitor CPU temperature, package power, effective clocks, and throttling while gaming or running a CPU benchmark. A BIOS reset may also have changed power limits or other processor settings.
The memory itself could still be defective or unstable, even if lowering the frequency makes the crashes disappear. Test each stick separately, run a longer memory test rather than relying on a short pass, and try another known-good kit if possible. Also avoid mixing kits or relying on XMP until the system is stable at default settings.
A 200 MT/s memory reduction should not cause a 50% performance loss by itself. I’d update the BIOS, load its default settings, and test the system completely stock. Since these games can be CPU-limited, check CPU temperatures, clock speeds, and whether the processor is actually boosting under load. Also compare a Cinebench result against other 12600K systems to see whether the CPU is generally underperforming.
The system was stable around 100–120 FPS at 3600 MT/s, but the memory-management crashes were becoming frequent. Lowering the speed stopped the crashes, yet GPU usage became unusually low and performance dropped. The RAM is only a couple of weeks old; I previously had problems mixing 2x16GB with 2x32GB kits, so I’m now using only the 32GB kit.
The processor had been running normally in this system for about four years before this memory issue appeared.