No PCIe switch involved, every SSD is directly connected to the PCIe ports, the MB supports bifurcation. Observed on H11SSL-i and H12SSL-i motherboards with various models of SSDs (mostly Intel, Micron and Samsung). Windows defender switched off.
Hyper-V is on though. And I understand that when you switch on Hyper-V, even the host OS is really a VM on top of the hypervisor. So I wonder if that's not contributing (but disabling Hyper-V is not an option).
When you say 1.5GB/s was beatable, how do you measure it? Windows copy (or xcopy) or some benchmarking software?
Hyper-V is on though. And I understand that when you switch on Hyper-V, even the host OS is really a VM on top of the hypervisor. So I wonder if that's not contributing (but disabling Hyper-V is not an option).
When you say 1.5GB/s was beatable, how do you measure it? Windows copy (or xcopy) or some benchmarking software?