Asmedia Asm1083 Serial Port Driver Windows 10 May 2026

ASMedia ASM1083 is not actually a serial port controller; it is a PCI Express-to-PCI bridge

chip. If you see a "PCI Serial Port" with a yellow exclamation mark in your Windows 10 Device Manager, the ASM1083 is simply the bridge that allows a separate serial card to communicate with your modern motherboard. ASMedia Technology Inc. Critical Driver Information itself is "Driver-Free":

As a standard PCI bridge, it does not require dedicated drivers for Windows 10/11. Windows identifies it natively using built-in system drivers. The "PCI Serial Port" Error: This refers to the actual serial controller

the ASM1083 bridge. You need the driver for that specific card (e.g., StarTech, Syba, or a chipset like MosChip or SystemBase). StarTech.com How to Find the Correct Driver

To identify the driver you actually need, follow these steps in Windows 10: Get the Hardware ID: Right-click the PCI Serial Port in Device Manager and select Properties tab and select Hardware Ids from the dropdown menu. Look for a string like PCI\VEN_XXXX&DEV_XXXX Search the Chipset: (Vendor) and (Device) codes and search for them on sites like PCI Lookup Device Hunt Common chipsets found on these cards include SystemBase Manufacturer Download: Once you know the brand (e.g., StarTech Support

), download the driver directly from their official site using the product ID. StarTech.com Common Compatible Drivers asmedia asm1083 serial port driver windows 10

If your card uses standard chipsets often paired with the ASM1083 bridge, you might be looking for: SystemBase SB16C1058 Commonly used in high-port count cards. StarTech PEX series drivers: Available at StarTech Downloads Legacy PCI Serial drivers:

Some older cards may require you to "Update Driver" -> "Browse my computer" -> "Let me pick" and manually select a standard "Communications Port" if the manufacturer driver is unavailable. StarTech.com 16-Port Low-Profile Serial Card - RS232 - PCI Express - TAA

Demystifying the ASMedia ASM1083: How to Fix "PCI Serial Port" Driver Issues on Windows 10

Have you recently looked at your Windows 10 Device Manager only to find a frustrating yellow triangle next to "PCI Serial Port"

? If you dig into the hardware IDs, you might find references to an ASMedia ASM1083 ASMedia ASM1083 is not actually a serial port

Before you spend hours hunting down an elusive driver, let’s clear up a massive misconception in the tech community and look at how to actually get your serial port working. The Big Misconception: The ASM1083 is NOT a Serial Port

When Windows flags a missing driver for a "PCI Serial Port" and users trace it back to the ASMedia ASM1083, they immediately go searching for an "ASMedia ASM1083 Serial Port Driver."

Here is the reality: The ASMedia ASM1083 is a PCIe-to-PCI Bridge chip. It does not process serial data. It does not have COM ports.

Its only job is to act as a translator, allowing older, legacy PCI expansion cards to plug into modern PCI Express (PCIe) slots on your motherboard. Why does Windows say "PCI Serial Port"?

Because the actual device missing a driver is the legacy serial card (or multi-I/O card) plugged Fix: In Device Manager, go to the serial

that bridge. Windows can see there is a device requesting resources through the ASM1083 bridge, but it cannot identify the actual serial controller on that card. How to Fix the Missing Driver on Windows 10

Because ASMedia does not make serial drivers for this setup, downloading generic "driver updater" tools will likely just install bloatware or malware. Instead, follow these steps to solve the root problem. Step 1: Identify the Actual Serial Chip

To get the right driver, you need to know who actually manufactured the serial controller on the physical card. Right-click the menu and select Device Manager Find the yellow triangle next to PCI Serial Port (usually under "Other devices"). Right-click it and choose Properties Click the property drop-down menu and select Hardware Ids You will see a string like PCI\VEN_XXXX&DEV_XXXX stands for Vendor. stands for Device. Step 2: Look up the Hardware ID Take that code and drop it into a hardware database like DeviceHunt PCI Lookup Database Common vendors for these legacy add-on cards include: MosChip / ASIX (Very common for budget serial cards) Oxford Semiconductor WCH (WinChipHead) Step 3: Download the True Driver

Once you know the actual chip manufacturer (for example, the ASIX AX99100 or a MosChip variant): ASM1083/1085 PCIe to PCI Bridge — PCI 1B21:1080

Troubleshooting Common Installation Errors

Issue 3: COM Port Number Not Retained After Reboot

Recommended Sources (in order of safety):

  1. Card Manufacturer’s Website – Search using the model number printed on the card or its retail box.
  2. Motherboard or System Vendor – If the serial port is integrated into a motherboard (rare for ASM1083), check the motherboard support page.
  3. Chipset Reference Drivers – Some generic PCIe-to-serial chipsets use drivers from MosChip (MCS9900 series) or Oxford Semiconductor (OXPCIe952). The ASM1083 is often paired with these.
  4. ASRock or ASMedia Legacy Driver Archives – For very old boards, ASRock’s support site may have an “ASMedia 1083 Driver” listed under "Other Drivers."

Configuring the ASM1083 in BIOS for Windows 10

Hardware conflicts are common. Before blaming the driver, check your BIOS:

  1. Restart and enter BIOS/UEFI (usually Del or F2).
  2. Navigate to Advanced > Onboard Devices Configuration.
  3. Look for PCIe to PCI Bridge (ASM1083) Settings.
  4. Ensure it is Enabled.
  5. Check PCI Latency Timer - set to 64 or 96 (too high can cause conflicts).
  6. If available, set PCIe Speed to Gen1 or Gen2 (Gen3 can be unstable with this chip).
  7. Save and Exit.