[ubuntu] no DVD drive in boot priority in install ubuntu

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http://ubuntuforums.org – hey all, just got my new pc here. back for second time. I made a mistake on MB choice, took it back for a switch. From ga-z77-ud3h to ga-z77-ud5h gigabyte. I was certain i chose the ud5h from the start, but didn't. Anyhow, i installed win 7 on it when i had the ud3h from the dvd. Next day i took it back, and they swapped boards for me. He said had changed drivers in win7 for the new board. And that works fine. Now that i want to dual boot with ubuntu, i cannot find how to boot from dvd drive. Only 2 choices are my two drives (1 ssd, 1 HDD). No where is there cd or dvd rom drive to boot f (Hardware)