QUOTE(drkpower @ Feb 4 2014, 05:43 PM)
thanks for your reply bro
it is 8 megabyte/second
my friend came to the office just now and he said my Ethernet cable is an ancient one..cat5
and he also suggest change to a better switch
Cat5, erm... well Cat5e can sustain 1Gbps speed without any issue in my home's network, but I'm not so sure about huge office environment (more than 20 PCs).
For home network where there's less than 5 busy devices on a single network, it's fine to use just Cat5e with cheap layer-1 switch, no issue at all.
QUOTE(arslow @ Feb 4 2014, 06:07 PM)
can those cheap switches actually sustain a 1gbps speed? something tells me no

Ok, maybe I guess if it just one connection it should be ok, but have never tried before.
I'm using DLink 8-port Gbps switch, no issue on my end yet, been running months non-stop, the only bottleneck could be my hard disk, running without any RAID.
To maximize the huge files transfer speed in Windows network, you can actually set the Jumbo frame to 4K and above, but best to set a standard amount (4K or 8K, etc.) for all PC's network card for stability issue, it has been tested on my end here, from 60MB/s to 75MB/s, could be more depends on the hard disk speed again, can reach 90MB/s and above easily with really fast hard disk or SSD on both end.
For few PCs access a single device, that'll again depends on the hard disk accessibility speed, also it may depends on the services as well, priority queues stuff like that.
I have 2 PCs access a single file shares before, watching full HD movie on both sides without any issue, no lags at all, but if you going to seek the movie, probably will need to pause for few seconds (lag) instead of instantaneous seek.