Why is my Crucial DDR4 3200 16GB lagging in complex scenes?
Man, the frame rate was dropping so hard it felt like a slideshow. My hardware was fine, but I realized my memory bandwidth was locked in single-channel mode. CPU-Z showed my Crucial DDR4 3200 was only hitting 22GB/s - 25GB/s, which is a complete joke for 4K rendering. I tried tweaking frequencies in software first, but it didn't matter—the bandwidth bottleneck was still there. It felt like trying to drink a milkshake through a tiny straw. I shut everything down, pulled the sticks, and popped them into slots 2 and 4, then verified 'Dual Channel' was enabled in the BIOS. The bandwidth instantly shot up to 44GB/s - 48GB/s, and the stuttering vanished, with FPS stabilizing around 85. I actually messed up the first time and the PC wouldn't even post, so I had to dig through the motherboard manual to get it right. RAM temps are 40℃ - 46℃ at 1.2V, and it's rock solid. Exported the frame time data, and the fans are humming along steadily at 1400RPM - 1600RPM.
