Tim,
PM me your pvcy setting don't allow noobs to PM you. I live right down the street in Gonzales.

Just put  a rig together today with an Octominer case and mobo. I'm impressed. temps are all around mid to high 50s with 5 rx480 cards installed. The airflow is really good for the Sapphire cards since the back end is open. Great combo IMO.

You might be starting off with too high of a clock change and the cards are rejecting the settings and reverting back to previous clock values.

My experience is that using the AMD Beta Crypto driver gives more control than Afterburner. I would say do these 10 easy steps for 28-31 MHs (Assumming your gear is working correctly)

1. Uninstall AB and remove the files when it asks if you want to keep them.
2. Use DDU to uninstall the current AMD driver.
3. Go to this folder (C:\AMD) and put all those files in a folder renamed to OLD.AMD.
  3.1 Go to system properties in Windows 10. See below step 3.1. This will keep your system from going back to the not crypto driver.
4. Install the Beta Crypto miner driver. When it asks if you want Relive choose yes.
5. If you have modded your BIOS you will need to run the pixelpatcher before you reboot. (very important step) If not modded just reboot.
6. When the system comes back up, don't start claymore yet.
7. Open the AMD driver and go to Gaming/Global/Wattman, accept the terms.
8. Change your fan temperature profile to to Manual. Set Max: 69 and Target to 58. Apply.
9. Go to the GPU speed. It's probably around 1300 or 1366. Change that to -12 or so. Get it to 1200 MHz
10. Go to the Memory settings and bring it up to 2100 to start. Hit apply. Run Claymore

Different cards all behave differently so I use this technique as a baseline. Some cards i have at 1200 GPU clock and 2100 Mem clock. Other cards are set to 1175 GPU clock and 2250 Mem clock but it really depends on your card and what memory type is installed on it.. Use GPUZ to monitor temp, GPU clock, Mem clock, and power draw.

Step 3.1- Right click the Start button and select Control Panel.
2. Make your way to System and Security.
Click System.
Click Advanced system settings from the left sidebar.
Select the Hardware tab.
Press the Device Installation Settings button.
Choose No, and then press the Save Changes button.

I've used these to help other folks out and it usually works out pretty well. I've found that after you play with the settings in the AMD crypto driver a little and you are not seeing any changes in hashrate, you need to restart Claymore. Sometimes you will need a reboot if you go out of range with your settings but usually restarting the Claymore batch syncs the cards to your specified settings... after every reboot check the GPU and Memory values manually by readjusting them again..
Another tip for rigs with multiple cards to figure out which card you are working on is to use GPUZ. When you change a cards core and memory values for identifying.. You can set them to something funky like GPU core 1275 and mem to 2050. Then look in GPUZ to find the card with those values. This will confirm which card you are working with.
Let me know if this helps.