Need help booting new custom build

[twixie]

After turning on the computer, it shows the bios thingy (where i can press del, f2, f8 or f11) then goes to a black screen with a flashing underscore.

I just built this pc, parts in it are:


Intel Core i5 2500K

ASRock Z68 Extreme3 Gen3 Motherboard

Corsair Vengeance CMZ8GX3M2A1600C9R 8GB (2x4GB) DDR3

Gigabyte GeForce GTX 550 Ti 1GB Overclocked

Silverstone Strider 500W ST50F-ES

Seagate Barracuda Green 2TB ST2000DL003

Intel 320 Series 80GB SSD



I've tried booting it seperately with the ssd and the hdd, same result.
No cd/dvd drive, i'm intending on installing the os from usb.

And i have gone into BIOS and set it to boot the usb first

 

[twixie]

bump

 

[Roark]

Silly question but, have you setup your USB drive to be bootable?

 

[Jamesparker8o7]

Did u make the usb bootable?

 

[NevoraskiA]

WinToFlash... great program

How To Create A Bootable USB Drive From Your Windows CD

 

[MindoverMaster]

Well, this, too: UNetbootin - Homepage and Downloads

I know KSoD personally uses this.