In the initial initialisation routine, as the Option ROM points to a PCI data structure (not the same as the configuration space), the option ROM code knows the device and vendor ID is at a fixed offset from RIP. This allows it to scan the PCI configuration space to find the correct device and BARs it needs to use.

A method and a system for improving the PCI-E L1 ASPM exit latency are provided to minimize an operation cost by reducing delay characteristics in processors using PCI-E interfaces. An interface has an electric power management function including a low power PCI-E state and a maximum power PCI-E …

Table 1. Top-level Menu Bar Features . Menu Function . Main You may run the UEFI SETUP UTILITY by pressing or right after you power on the computer, otherwise, the Power-On-Self-Test (POST) will continue with its test routines. Page 61: Ez Mode X299 Extreme4 4.2 EZ Mode The EZ Mode screen appears when you enter the BIOS setup program by default. About 5 minutes after starting the operation, the PC freezes.

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00A1E Program PCIe ASPM after OpROM [ Disabled ]. Enabled: PCIe   El Administrador de energía de estado activo (ASPM) ahorra energía en el subsistema de Interconexión de componentes periféricos Express (PCI Express o  The BIOS Setup program can be used to view and change the BIOS settings If the system locks or won't boot after making BIOS settings changes, perform a BIOS Recovery. If set to Disable, ASPM support is disabled for all PCIe de 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode). • 2 x PCI Express you wish to return the motherboard for after service. This option enables/disables the control of ASPM on CPU side of the DMI Link. You may schedule the startin PCIe x16/.

State After G3: Specify what state to switch to when power is re-applied after a power failure (G3 state). State S0 - Active; State S5 - SW Off; mSATA-PCIe: Switched between SATA and PCI Express interface on the full size mini PCIe slot. SB PCI Express Config: PCI Express Root Port Clock Gating: Enables/Disables PCI Express Root Port Clock Gating

[11:10] = 01 indicates that L0 is supported. [11:10] = 10 is reserved again.

Program PCIe ASPM after OpRom [Disabled] Allows you to select when to program the PCIe ASPM.

全称是：Active State Power Management……. 我实在想不出这个选项能有什么用，好像是不应该放出来给用户修改的选项 PCI Express Active-State Power Management (ASPM) has been disabled due to a known incompatibility with the hardware in this computer. Device Drivers: Devices with missing or misconfigured drivers can increase power consumption. Program PCIe ASPM after OpRom [Disabled] Allows you to select when to program the PCIe ASPM. 2016-01-14 · Restore PCIE Registers: On non-PCI Express aware OS's (Pre Windows Vista) some devices may not be correctly reinitialized after S3 (sleep state). Enabling this restores PCI Express device configurations on S3 resume.

for entering RAID OPROM). - Reworked PCI IRQ routing for PCIe x4 and x1 slot. - Fixed: Pause key not working during POST. - … PCIe ASPM Support ASPM L0s is not supported for Gen 2 (5 Gb/s) line rate. Work-around Set the following attributes on the Integrated Block for PCI Express to disable ASPM L0s:-LINK_CAP_ASPM_OPTIONALITY = TRUE-LINK_CAP_ASPM_SUPPORT= 0 See Answer Record 43243 for additional details. IEEE Std 1149.1/1149.6 Boundary-Scan 2019-01-20 Cisco UCS C-Series Integrated Management Controller GUI Configuration Guide, Release 3.1 -BIOS Parameters by Server Model I was under the impression that the very first option was the global enabling of ASPM for everything underneath it.
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Disabled: PCIe ASPM will be programmed before OpROM. Program PCIe ASPM after OpRom [Disabled] Allows you to select when to program the PCIe ASPM. Chapter 4: BIOS Program PCIe ASPM After OPROM PCIe ASPM, the Active State Power Management for PCI-Express slots, is a power management protocol used to manage power consumption of serial-link devices installed on PCI-Exp slots during a prolonged off-peak time. If this item is set to Enabled, PCI-E ASMP will be programmed after OPROM.

A method and a system for improving the PCI-E L1 ASPM exit latency are provided to minimize an operation cost by reducing delay characteristics in processors using PCI-E interfaces. An interface has an electric power management function including a low power PCI-E state and a maximum power PCI-E state.
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Malicious Code Execution in PCI Expansion ROM. The malicious code in x86/x64 firmware can potentially reside in many places. One of them is in the PCI expansion ROM. In the past, the small amount of memory during PCI expansion ROM execution acted as a hindrance to this malicious code.

The difference between them are power savings versus the time it takes to recover from the sleep state (Latency). If you select Moderate Power Savings, the power savings are less, but the time to recover from the Sleep state (latency) is much shorter.