Could you please let me know if the PCIE Storage RAID Support option appears but it doesn't allow you to enable Intel® Optane™ memory or if the option doesn't appear at all?
In the ASUS PRIME Z270-A motherboard, the option should appear once you select “Intel RST Premium With Intel Optane System Acceleration (RAID)” in the option Advanced\PCH Storage Configuration\SATA Mode Selection in the BIOS menu. If it doesn’t appear, it means that the Intel® Optane™ memory is not properly connected. I'm not sure about the model of your motherboard, but it should be similar to this one.
I'll investigate about your motherboard to see if there is any particular detail with the M.2 slot. I'll update the thread as soon as possible. In the meantime, please make sure the Intel® Optane™ memory is properly attached to the slot.
After investigating about your motherboard, I found useful information that may help you to set up the Intel® Optane™ memory.
One thing that I wanted to check before was the M.2 slot. From the specifications of your motherboard (PRIME H270-PRO | Motherboards | ASUS USA ), the M.2 slot that you are using supports the module, so there are no issues with it.
According to your description and the guide below, if you can see the Intel® Optane™ memory in Windows but cannot enable the PCIE Storage RAID Support option, it's probably because the RST driver is not installed yet. Please follow these installation instructions provided by ASUS* to setup the Intel® Optane™ memory: http://dlcdnmkt.asus.com/microsite/Optane-Memory-SOP.pdf
Make sure first that you are using a 7th Generation Intel® processor and the motherboard drivers and BIOS are updated to the latest version. You can check this information from the ASUS* site: PRIME H270-PRO FAQ | Motherboards | ASUS USA
Once you have make sure the BIOS and motherboard drivers are updated, please follow the instructions of the guide above. You will find every step detailed with pictures in the guide, but basically you would have to do the following:
- In BIOS, set the SATA Mode Selection to Intel Optane Intel RST Premium With Intel Optane System Acceleration (RAID).
- Boot Windows and download the Intel® RST driver from this site: Download Intel® Rapid Storage Technology (Intel® RST)
- Install the Intel® RST driver.
- Once the driver is installed, run the RST application and you should see the Intel® Optane™ memory. However, the Enable option under the OptaneMemory item should be unclickable as there is still something we have to configure in the BIOS.
- Go to BIOS one more time. The option to enable the PCIE Storage RAID Support should be visible now. Please confirm if you still have issues in this step. If it appears, select Enable.
- Set CSM to Disable.
- Save the settings and boot Windows. If you go to the RST application again, the Enable option should be clickable.
These steps are better explained in the guide above with pictures. Please follow it and let me know if it works, or if you have issues with some step.
I’ll be waiting for your response.
Have a nice day.
Thanks for confirming that it’s working now.
If you have further questions, please don’t hesitate to post them in the community. We’ll be more than glad to help you.