As title. When I press Start Render Test for the PCI-Express test, the pattern window is just blank white! I notice the GPU Core Clock and GPU Shader Clock briefly spike for a few seconds as soon as I click the test button. The Bus Interface also changes while the graph spikes to PCI-E 2.0 x16 @ x8 2.0 and was 1.1 beforehand. See screenshot of spike chart and details. Using driver version: 334.89. Windows 7 Pro Gigabyte GTX-460 Gigabyte GA-x58a-UD3R Many thanks.