Supposing we have a sales table as following screen shot shown, and we need to border cells with amounts no less than 650 in Column E, and you can get it done as follows:

Step 1: Select the range where you want to border cells with amounts no less than 650. In our case, we select the Range E2:E24.

Step 2: Click the Conditional Formatting > New Rule on the Home tab.

Step 3: Now you get into the New Formatting Rule dialog box, and you need to:

(1) Click to highlight the Use a formula to determine which cells to format in the Select a Rule Type box;

(2) In the Format values where this formula is true box, enter the formula =E2>=650 (E2 is the first cell with amount in Column E);
(3) Click the Format button.

Step 4: In the coming Format Cells dialog box, go to the Border tab, specify a line style and line color in the Line section, click the Outline button in the Presets section, and click the OK button.

Step 5: Click the OK button in the New Formatting Rule dialog box.

Now you will see all cells with amounts no less than 650 are added red borders as below screen shot shown.