People have really got to get their heads around the difference between VSTi's DXi's and ROMPLERS.
It is only with the first two that CPU, Ram etc etc makes any difference.
The third is TOTALLY dependent on the number of Oscillators on board, 1 osc = 1 note, 4 osc = 4 notes, you get the idea.
Oscillators are hardware, ie, can only be increased by building a new keyboard, or have the ability to install a new mother board, or in the case of romplers more probably a daughter-board.
The ROM chips ONLY store wave/sample data and have nothing to do with polyphony. Polyphony on these instruments is determined by the number of oscillators
If there are only 64 available oscillators, then no matter WHAT you do it will ALWAYS be 64 note polyphony TOTAL.
The more samples used to create the sound the less available polyphony.
Which is the opposite on VSTi DXi where the upper limit on polyphony is, theoretically, unlimited.
Dennis