i'm not sure how you're using these supplements but, these supplements are taken for different purposes, you know that right?
Ginkgo Biloba is used as memory and concentration enhancer, and anti-vertigo agent. Ginkgo supplements are usually taken in the range of 40–200 mg per day
Fenugreek is used among many things as libido support, and it works wonders for a natural supp, I take it pre and post workout.