I tested RB600 and RB433Ah and a wrap Board with 500 MHz as well. The best performance was with the WARP Board, followed by the RB433Ah and than comes the RB600. Ok, it has a GB port but if I test the 1 GB port with Btest I get not more than 60-70 Mbit in half duplex. So for what do I need a 1 GB Port if it even does not have 100 Mbit? The WRAP Board has 90 MB in half-Duplex and the 433AH has 70 MB and in half and 35 MB in full-Duplex.
I had the same results. WRAP boards with 500 Mhz are the fastest ones, followed by RB433AH and than came the RB600.
WARP 90 MB TCP
433AH 50-60 MB TCP
RB600 35-45 MB TCP
Everthing made with Btest one way from a Windows XP Notebook with 100 MB direct to the boards without a switch. I tested as well the RB800, which seems very much faster, but is eally more expensive....