What is Max Tolud in BIOS?

What is BIOS Tolud?

The address area reserved for this purpose can be modified in the BIOS via the variable "TOLUD" (Top Of Low Usable DRAM). The factory setting of this variable's value is 3GB. This results in a reserved PCI address area of 1GB.

What is above 4GB Mmio BIOS assignment?

The definition of “Above 4G decoding” is to allow the user to enable or disable memory mapped I/O for a 64-bit PCIe device to 4GB or greater address space.

What is 4G decode?

The definition of “Above 4G decoding” is to allow the user to enable or disable memory-mapped I/O for a 64-bit PCIe device to 4GB or greater address space. Please enable this function when using multiple PCIe cards.

Should above 4G decoding be enabled?

In most cases, it does not need to be enabled. In my experience, most motherboards default to having this setting off. There's generally no harm in enabling it if you have a 64-bit OS.

What is maximum DVMT?

In the bios settings there is an option to set DVMT to 128MB, 256MB, or MAX DVMT. ( 1696MB, information given by Intel graphics panel). Looking at the information panel of Intel graphics, we can see the size of allocated memory to DVMT, going higher following windows openings.

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