Restore old logic partially

src/video_core/vulkan_common/vulkan_device.cpp

@@ -1378,13 +1378,13 @@ void Device::CollectPhysicalMemoryInfo() {
         device_access_memory += mem_properties.memoryHeaps[element].size;
     }
     if (!is_integrated) {
-        const u64 reserve_memory = std::min<u64>(device_access_memory / 4, 2_GiB);
+        const u64 reserve_memory = std::min<u64>(device_access_memory / 8, 1_GiB);
         device_access_memory -= reserve_memory;
 
         if (Settings::values.vram_usage_mode.GetValue() != Settings::VramUsageMode::Aggressive) {
             // Account for resolution scaling in memory limits
-            const size_t normal_memory = 3_GiB;
-            const size_t scaler_memory = 2_GiB * Settings::values.resolution_info.ScaleUp(1);
+            const size_t normal_memory = 6_GiB;
+            const size_t scaler_memory = 1_GiB * Settings::values.resolution_info.ScaleUp(1);
             device_access_memory =
                 std::min<u64>(device_access_memory, normal_memory + scaler_memory);
         }