This post will be updated as announcements come out for start times for 9/12 from the twelve day selection process that most TV networks adhere to. Please understand that games can be held until next Sunday if a broadcaster wants to wait on the results of the Week Three games. Most conferences have the possibility of having all or part of their games held for a six day hold of the start time.
The list of available TV windows are based on media websites, TV listings and press releases. They can change based on the needs of the broadcaster or the conference.
Here's what I guessed based on the available openings (they will prove to be incorrect) and here is the current schedule for the week as several FBS games do have their time & television/webcast assignments already accounted for.
The number of six day holds available for each conference
Big 12: 4
Big Ten: 4
12pm ABC: Michigan St. at Northwestern
12pm ESPN/ESPN2: Southern Miss at Alabama
12pm ESPN/ESPN2/SECN: LSU at Vanderbilt
12pm ESPN/ESPN2/SECN: Tennessee at Florida
12pm FS1: UL Monroe at Iowa St.
12pm ESPNU: California at Ole Miss
12pm ACCN: Western Michigan at Syracuse
12pm BTN: Connecticut at Indiana
12pm BTN: Boston College at Rutgers
12pm ACC RSNs: Elon at Wake Forest
2pm ESPN+: UL-Lafayette at Ohio
3pm ESPN3: Central Connecticut St. at Eastern Michigan
3pm ESPN+: Troy at Akron
3:30pm CBS: Auburn at Texas A&M
3:30pm ABC/ESPN/ESPN2: Washington at BYU
3:30pm ABC/ESPN/ESPN2: Louisville at Florida St.
3:30pm ABC/ESPN/ESPN2: UCF at Pittsburgh
3:30pm FS1: SMU at TCU
3:30pm ESPNU: Temple at Buffalo
3:30pm CBSSN: Wyoming at Tulsa
3:30pm BTN: Miami (OH) at Ohio St.
3:30pm ACC RSNs: Appalachian St. at North Carolina
3:30pm ESPN3: Bowling Green at Kent St.
4pm SECN/SECN Alt: Kentucky at Mississippi st.
4pm SECN/SECN Alt: South Carolina at Missouri
4pm ACCN: Central Michigan at Miami (FL)
4:30pm ESPN+: West Virginia at Kansas
6pm ESPN3: William & Mary at East Carolina
7pm ESPN: Oregon at Stanford
7pm ESPN2: Old Dominion at Virginia
7pm ESPNU: Ball St. at NC State
7pm ESPN3: Southern Illinois at Arkansas St.
7pm ESPN+: Georgia St. at Arkansas St.
7:30pm ABC: Oklahoma St. at Texas
7:30pm SECN: San Jose St. at Arkansas
7:30pm ACCN: Charlotte at Clemson
8pm BTN: Nebraska at Illinois
10pm Pac-12: Colorado at Arizona St.
10:15pm ESPN2: Toledo at Colorado St.
10:30pm ESPN: UCLA at Washington St.