Fixing memory bandwidth bottlenecks on Kingston FURY DDR3 1866?
It's honestly kind of hilarious that this ancient RAM is causing my modern CPU to fluctuate, but here we are. The Kingston FURY DDR3 1866 just hits a bandwidth wall during the chaotic physics of Helldivers 2, leaving the CPU idling for data and causing core temps to swing between 85-92℃, which triggers a slight downclock. I tried dropping the graphics to the absolute minimum, but the game looked like a pixelated mess from 1995, so that was a no-go. I went into the BIOS and bumped the DRAM voltage from 1.5V to 1.6V, and tightened the primary timings from 10-10-10-30 to 9-9-9-28. In AIDA64, the memory latency dropped from 85ns to 76ns, and the frequency jitter completely stopped. I did hit a scare where the RAM temps peaked at 65℃, so I had to zip-tie a tiny 40mm fan directly over the DIMM slots to keep it safe. Now the CPU stays at a steady 76℃ and the system is incredibly stable. I've backed up this config, and the fans are holding steady at 1400-1600RPM.
