Yes, everything was done:
1. Computer was imported to device collection "All Systems"
2. Task seuqnece deployde to this collection
3. Boot image x64 and image for Windows 7 distributed to the ditribution point
4. WDS wasn't configured manually, it was automaticly installed by SCCM 2012
5. DHCP settings are correct, boot filename is SMSBoot\x64\wdsnbp.com
6. And of course all PXE settings in boot image, task sequence and distribution points was enabled.