Hi, I'm a bit out of touch with running large sims so could do with a bit of help choosing an optimal configuration - used to use rack based opterons but that was a while back. I'm interested in some real world machine/cpu recommendations for running AMS sims. I'm running veriloga and verilog rtl in AMS under ADE - IC5141. ( at some point the real schematics will be swapped in ) OS Using RHEL 4 - but I have a memory that RHEL5 was faster 32bit vs 64bit TOOLS IC5141_USR5 / Incisive_92 / MMSIM_62 again I think MMSIM7 was faster but we don't have time to swap so need to stick with these CPS Raw clock speed used to be the thing with large on chip cache Mobo/System Any good ideas on what works best Budget No supercooled systems just affordable ones for a small engineering company cheers G