Prime95 Blended Test question

I wanted to ask about the correct operation of Prime95 Blended test, to see if it is working or if something is wrong with my setup. I know the blended test uses lots of RAM, and I see my RAM usage go sky-high when the test runs on my P4 530J. However, the CPU usage remains very low, even when running two instances. Is this normal for this test? Does the usage eventuallly go up when the test continues?

blend is mostly for ram.

large fft is for both cpu and ram

small fft is for cpu mostly.

I have found blend useless for checking ram, memtest86 i have found to be great for checking ram.

you get errors if you run dual prime wiht blend., just run memtest instead.