Dell T7400 Workstation - Memory Riser Question

Dear All

i have a T7400 workstation and have used the system with two pairs of Risers successfully with eight 8Gb DIMMs making 64Gb RAM total.

My question is: can I use just one pair of risers fully populated with the eight 8Gb DIMMs to achieve the 64Gb RAM rather than the two pairs of risers with gaps for more DIMMs?

Ps: all the DIMMs are in matched pairs.

Thanks for any help you can give.

Brad