I recently got the smc8508t, a smc9462tx (64bit pci), and 2 smc9452tx (32bit pci) adapters. The smc9462tx went into the system in the sig. The other two went into a sn41g2 and a sn45g. These have 200GB wd harddrives. I copied a 2GB mpeg, a 1GB mpeg, and a 250MB folder with lots of 1-2MB files using the network browser and file sharing with winxp pro.
sn45g to sn41g2
fast 8.9-9MB/s for 1&2 and 8.3MB/s for 3
gige 30-31MB/s for 1&2 and 20MB/s for 3
gige jumbo (9014kB) 32-33MB/s for 1&2 and 21MB/s for 3
sn45g to mpx2
fast 7.3MB/s for 1&2 and 6.5MB/s for 3
gige 22MB/s for 1&2 and 14.5MB/s for 3
gige jumbo (9014kB) 23-24MB/s for 1&2 and 14.5MB/s for 3
I think this shows that my transfer rates are highly dependent upon the harddrive speed since my mpx2 has fairly slow harddrives in comparison. I did a rough estimate of the cpu usage and in going from gige to gige with jumbo frames it dropped from 55% to 45% during a 1GB transfer. I also did the tests copying the filed in the other directions but the numbers did not change too much. All in all it was about $300 for the switch, cards, and cables.
sn45g to sn41g2
fast 8.9-9MB/s for 1&2 and 8.3MB/s for 3
gige 30-31MB/s for 1&2 and 20MB/s for 3
gige jumbo (9014kB) 32-33MB/s for 1&2 and 21MB/s for 3
sn45g to mpx2
fast 7.3MB/s for 1&2 and 6.5MB/s for 3
gige 22MB/s for 1&2 and 14.5MB/s for 3
gige jumbo (9014kB) 23-24MB/s for 1&2 and 14.5MB/s for 3
I think this shows that my transfer rates are highly dependent upon the harddrive speed since my mpx2 has fairly slow harddrives in comparison. I did a rough estimate of the cpu usage and in going from gige to gige with jumbo frames it dropped from 55% to 45% during a 1GB transfer. I also did the tests copying the filed in the other directions but the numbers did not change too much. All in all it was about $300 for the switch, cards, and cables.