micron g5 on 1660 is not the same as the g5 on pascal. new d9vvr is far more better than old d9tcb.
the new g5 from micron has significant headroom for oc. unlike on pascal eg 1070 the micron g5 in general can oc ~150mhz only.
samsung highest g5 version is native 9gbps. while micron has 8gbps only. i was disspointed about nvidia not choosing the 9gbps from samsung but the new micron g5 shows it is capable to do 9gbps or even 10gbps although timings may be worse on micron g5.