Well, that depends on what enough means. If your primary goal is to get stronger and set new PRs each week, then yes, Texas Method's Volume Day has enough volume for lifters moving from the novice phase to the intermediate phase. As weights get heavier, it becomes more difficult for the lifter to adequately recover from each workout, which is why Texas Method provides a recovery day and why the intensity day doesn't have as much volume, which allows the athlete to feel fresh going into the next week's difficult volume day.