New setup not booting (Sabertooth 990FX, AMD FX8120)

[nitecrawler0919]

Hello,

So im not exactly new to building computers but i do have room for improvement especially when it involves motherboards lol. so i just purchased a new CPU, MOBO, RAM and a new aftermarket CPU cooler, and i hooked everything up and the computer starts up and POSTs and i am able to get into the UEFI BIOS and im able to boot from my new copy of windows seven to start installing the O/S onto the new system and that is where i have my issue.

every time i try to format a drive ( i have three different HDD's all SATA) or even just keep it unformatted and just install the O/S the system just shuts off... no reason at all that i have seen but as soon as i hit the OK button to format the drive BAM! shuts off.

at first i though it was the PSU so i unhooked two of the drives and only used one stick of RAM in the slot farthest away from the CPU so all i had installed was the CPU w Cooler, one SATA dvd drive one vid card and one hdd and i knew that my 850W PSU should have been able to handle that but... did the exact same thing.

im able to stay in the BIOS for as long as i want and im able to be in the installation of windows screen for as long as i want until i reach the point of either installing the actual O/S or im about to format a HDD to install the O/S. so i really dont think its the PSU.

next i thought it was the HDD but i tried installing the O/S on THREE different drives, i mean what are the chances that they were all bad? but i checked any way and ran S.M.A.R.T tests on all three through the BIOS and they all check good.

so now here i am trying to figure this crap out and im out of options... is it the MOBO? or the new CPU? right when it shuts off the CPU_LED light flashes for a split second and then it shuts completely off, and when i press the power button to turn it back on nothing happens until i actually flip the switch on the back of the PSU to off then on again and the whole process starts over.

also during POST the BOOT_DEVICE_LED stays on until i choose the disc drive to be booted from then it goes off and then proceed to boot from the windows disc until i reach the installation part of it.

HELP ME!!!! PLEASE!!!!

here is my setup:

ASUS Sabertooth 990FX
AMD FX 8120
16 GB Corsair Vengeance DDR3 PC1600
160 GB SATA II HDD
250 GB SATA II HDD
500 GB SATA II HDD
cooler mastercpu cooler ( N212 i believe)
Writemaster 22X DVD RW sata drive
850W Black Widow PSU
ATI Radeon HD 5750

any ideas would be very helpful thanks!

 

[nitecrawler0919]

thanks for all your help i really appreciate it, the issue was the PSU apparently it was faulty and i just purchased a new better one so again i appreciate all the help and i guess i should have tested the PSU straight from the begining but there were alot of coincidences, that made the PSU being bad the culprit, not seem likely but i guess it was so thanks again.

 

[nitecrawler0919]

Best answer selected by nitecrawler0919.

 

[Rockdpm]

Glad we have a answer you were looking for.

 

[nikorr]

This topic has been closed by Nikorr