MSI RX 570 Armor OC Edition 4GB [Hynix] 5E2 BIOS

Anyone have a BIOs mod for this that does 26+ MH/s?
Anoraktek is not very helpful at this time. They only have 5E1 BIOS, I am looking for 5E2.

Probably 4U PCI-E expansion chassis to one main motherboard.
Six units stacked on top of each other. They have redundant power supplies.
Power in China is $0.03-0.04 kWH.

I resolved the 2.4 MH/s issue. I needed to upgrade the Win 10 from v1533 to v1703 Anniversary.
Now at stock is 25.7 MH/s. My new issue is a Code 43 that can't pick up the 8th card. Any ideas?

I am reinstalling Win10; I had v1511.
I will try your suggestion and put in v1703 and see how it goes and post an update of my situation.

I am using Windows 10.
ASUS Prime Z270-AR

I have a MSI GTX 1070 Aero ITX, the short and stubby version of the full sized MSI Aero. It is so disappointing.

**It is only hashing at 2.4MH/s, out of box.**

I think has to be something wrong or there is a work around this card. Tried using Claymore 9.4 and 9.5; reinstalling CUDA and Visual Studios, none which seems to have done anything. It is currently on the Nvidia 385.53 driver.

If anyone knows of a solution, it would be greatly appreciated.

Screenshots below: