Hi,
This is to inform everyone about how wtupid LG Service people are, they told me that if I was using a laptop I should go for USB cable while for Desktop systems serial cable is fine, many of us also has a misconception that USB cables are faster.
Also while using nForce boards the USB cables can't keep a stable connection they disconnect within 5 min. of connecting its a flaw with USB cables. SO BEWARE. Also the serial cables do not compromise on speed when using a serial port speeds that can be achieved are upto 115400 which means upto 14 KB/sec speeds are supported which one never gets on reliance Rconnect. So serial port is suffiecient.