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Question: How can I remap M2_3 slot and other M.2 slots to configure a PCIE SSD RAID on Z490 Taichi?(6/1/2020)

Answer:
Please make sure to use identical PCIE SSDs that are the same type and volume.
Follow the steps below to adjust the BIOS settings to configure the PCIe RAID.

STEP 1. Enter the UEFI Setup Utility by pressing or < Del > hotkey during the post screen.

STEP 2. Go to Advanced -> Storage Configuration and set SATA Mode Selection to [RAID Mode].

STEP 3. Go to Boot -> CSM and set Launch Storage OpROM policy to [UEFI only].

STEP 4. Adjust the M.2 slots - RST PCie Storage Remapping that you've installed PCIE SSDs to [Enabled]. Press to save the settings and exit setup.

4th BIOS screenshot 1

STEP 5. Go to Advanced -> USB Configuration and set Third Party USB 3.2 Controller to [Disabled]. Press to save the configuration changes and exit setup. Caution: After disabling the Third Party USB3.2 Controller, the onboard Type-C port will be turned off.

5th BIOS screenshot 2

STEP 6. Enter Intel(R) Rapid Storage Technology in Advanced page.

6th BIOS screenshot 3

STEP 7. Select the option Create RAID Volume and press .

7th BIOS screenshot 4

STEP 8. Key-in a volume name and press , or simply press to accept the default name.

8th BIOS screenshot 5

STEP 9. Select your desired RAID Level and press .

9th BIOS screenshot 6

STEP 10. Select the target hard drives which you want to build in RAID array and press .

10th BIOS screenshot 7

STEP 11. Select a stripe size for the RAID array and press .

11th BIOS screenshot 8

STEP 12. Select Create Volume and press to start creating the RAID array.

12th BIOS screenshot 9

Question: I am using Intel^® chipset X48 / X38 / P45 / P43 / G43 / P35 / G31 / P965 series motherboard with 4GB memory modules installed. But it always detects the memory size as 3GB instead of 4GB at POST screen. What should I do?(10/23/2008)

Answer:
Please enter BIOS setup and enable the "Memory Remap Feature" option.
(BIOS / Advanced / Chipset Configuration / Memory Remap Feature)

Question: I have installed total 4GB memory on my motherboard. However, it can only recognize around 3GB or less. How should I do to recognize 4GB totally?(2/17/2006)

Answer:
Please refer the description Q4 of Q&A-20.
https://www.asrock.com/support/QA/TSDQA-20.pdf
This limitation applies to most chipsets & Windows^® XP 32-bit version operating system.
If you want to get 4GB memory for your system, below two conditions must be required:
1. The memory controller which supports memory hole(memory remap) functionality is used. The latest chipsets like Intel^® new chipset, or other chipsets and AMD^® K8 CPU architecture can support the memory hole(memory remap) function.
2. Windows^® XP Pro X64 Ed. (64-bit) or other OS which can address more than 4GB memory.
http://www.intel.com/support/motherboards/server/sb/cs-016594.htm

Question: I installed Windows XP x64 Edition on a system which is built by an Intel EM64T CPU and 4 GB memory on 775i915P-SATA2 / 775i65PE / 775V88+ / 775V88. Windows reports system memory about 3.0 - 3.5 GB. Why?(12/19/2005)

Answer:
Although the CPU and Operating system supports 64 bit addressing, Intel 915P, 865PE and VIA PT880 chipsets does not support remapping function. The missing memory addresses are reserved for PCI I/O space, AGP aperture mapping space, and other onboard device I/O space. Although the chipset datasheet may claim memory support up to 4 GB, the system actually only reports about 3.0 - 3.5 GB with four 1 GB DDR memory modules.

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