thx mate
my DFI doesn't like high QPI-link, max bench stable BCLK i can get with QPI-LINK in full mode is about 230 MHZ.
tomorrow i will try although i don't think that QPI-link in full mode can give me a boost in 2d bench like wprime.
p.s. would be nice to have a cascade, this is only a single stage 1.2 HP rotary phase change