Upon your return...
First add the make and model of the PSU to your signature. 1000w should be more than enough, but you could be running alot of items...you list your controllers but not the HDs connected to them. Most Internal HD have 2 power sources being utilized. they get power straight from the PSU and then thru the SATA/IDE cable also. So, Im not exactly sure about eSATA power scheme.
Now on HDs themselves....for the most part, not all HDs need firmware, and alot of people never even know that there is firmware for the HD. What happens is on XXXX chipset, there is no issue, but on YYYY chipset there is. But you take a different SEAGATE drive and place it on YYYY chipset and there is no issue.
When this happens and the company knows that enough drives have been sold and enough people have the problem, they will issue a firmware to prevent it from happening. As an example,
Click HEREWhen supported by the latest firmware updates, downloadable from Seagate once you've purchased your drive, this spectacular unit offers the best of both worlds -- top performance and a very small eco-footprint, so you know you have an industry leader AND are doing something good for the environment.
So, when certain anomolies appear, you pull the drives, and get the model / serial numbers....I believe some of these companies also have Firmware checking tools to pull up frimware info. Then you can contact them and ask. The above model has 3 firmwares CC1H, CC1J and whatever it came out with.
But I could be WAYYYYYYYYYYY off base. But you have already updated the Driver and feel confident you did that right. The fact everything appears to work, Im going with your confidence on that also.
Sustained POWER could be an issue, but trying not to go there because I focus on that to much generally.
One other area of concern. OPTIMIZED DEFAULTS. Enter the BIOS, only chnage this.....There is a Voltage Value on the RAM sticker, Make sure that is the value listed in the BIOS....if that value is 1.8 or 1.85 on the sticker, make it 1.9 in the BIOS. If the BIOS did not match the sticker, fix that.