windows 7 prof x64 slow install

Have you Checked the Ram & CPU support.

yes the cpu which i have is supported, Asus mobo ram supported(DDR3 1866(O.C.)/1600(O.C.)/1333/1066 MHz ECC, Non-ECC, Un-buffered Memory), though i have ddr3 1600 and its supported....

I still strongly believe that there is some setting in bios or sole clock setting or issue with my hdd with IDE and AHCI config..

Try clearing your BIOS. to Factory Defaults.
How To Clear CMOS (Reset BIOS)

cleared cmos .....by removing cmos battery and by using jumpers also..

Take look at option 4&5
Windows 7 Installation Errors : Troubleshoot Step by Step


i did hdd test and fount read errror, now i bought new hdd in the lieu of my old hdd,,and noe my win7 x64 installed withini 15 mins....Thanks to you theog and thanks to all ppl who helped me....

You are welcome.

i know i shouldn't be pulling up a dead thread but i came across this trying to fix it myself and found the answer elsewhere. go the the bios and disable the floppy drive (common on asus that it will be enable if its installed or not.) may or may not help but if so this is something a found elsewhere thought i should share.
cheers

Agreed. Floppy drivers should be physically uninstalled by pullling the cables at least. They get forgotten and then can be found to be the problem after days of troubleshooting.