[LagunaX]

? What black window ?

I just use Prime95 x64.

The only thing i change is doing a "custom" blend test by increasing the memory to all my free available memory on my system which is usually 6.7gb for 8gb. Otherwise prime95 will default to testing only 1.6gb.

linX can tell you your free available memory by clicking on the "all" button next to memory after linX loads up.

You can also change the min/max FFT's to 720k size for Prime95 custom blend if you want but that will just mostly test memory and not the whole system overclock stability.