My Great Wall GW3300 256GB is dropping speeds in heavy scenes in Dead Space 2, causing massive lag.

By the time I hit Chapter 2, the once-smooth corridors started looking like a slideshow, and this slowdown was painfully obvious on a cramped 256GB drive. Once the GW3300's free space dips below 15%, the controller's garbage collection kicks in way too often, causing random write speeds to crater from 400MB/s down to about 80MB/s. I tried the obvious route of deleting a few apps to free up space, but even with an extra 10GB, the drops persisted—it's frustrating when simple cleanup doesn't touch the underlying logic. I ended up manually triggering a system-level TRIM command and used a partition tool to re-verify the 4K alignment. In CrystalDiskMark, the write stability jumped from 60% to 92%, and scene loading finally felt right. To be fair, during the TRIM process, disk usage spiked to 100% and the whole system froze for a moment until the process finished. The drive hovered between 40-48℃, which is pretty stable. After a continuous read stress test, the speed drops are gone, and my RAM temps stayed around 58-63℃.