Fixing VRAM scheduling on Sapphire RX 7800 XT 16G Polar?
There is nothing more frustrating than sneaking through brush only to find distant trees turning into blurry blobs; it's usually because the VRAM clock is tanking during load shifts. The Sapphire RX 7800 XT 16G Polar Edition OC usually hovers around 2000 - 2100 MHz, but when hitting 4K textures, the voltage offset was too low, causing the memory to plummet to 1000 MHz. I tried turning on Super Resolution in the driver, but while the edges looked sharper, the blocky blur was still there—a classic case of treating the symptom, not the disease. I went into the AMD Software performance tuning tab, bumped the memory voltage to 1.35V, and locked the minimum frequency at 2000 MHz. In GPU-Z, the memory clock curve went from a jagged mess to a flat line, and texture pop-in vanished. Interestingly, the VRAM temp spiked to 92℃ immediately after the voltage bump, so I had to crank the fan curve to 80% to keep it between 82 - 86℃. Core temps stayed at 65 - 71℃ with power draw at 240 - 260 Watts. After three hours of stealth testing, the textures are perfect and VRAM stays at 82 - 86℃.
