ASUS XG-C100C 10G Network Adapter PCI-E Card - 10Gbps Upgrade

Our review of the ASUS XG-C100C finds it is a practical way to add 10Gbps connectivity to a desktop without replacing existing network infrastructure. It is aimed at power users, small office desktops and content creators who need much faster wired transfers than gigabit Ethernet can provide. The single-board PCI-E x4 design and an RJ-45 copper port let a user upgrade to next-generation 10GBase-T speeds using standard Cat6a/Cat7 cables, while the built-in QoS helps keep important traffic flowing smoothly.

Key Features

• 10Gbps networking: Delivers up to 10X faster data-transfer speeds for bandwidth-demanding tasks such as large file moves and video editing.
• Backward compatibility: Works with 10/5/2.5/1Gbps and 100Mbps networks so it can connect to existing switches and routers without adapters.
• RJ-45 copper port: Uses standard network cabling to upgrade a desktop to 10Gbps without fiber or special transceivers.
• PCI-E x4 interface: Fits into a spare PCI-E slot for a straightforward internal installation on most desktops.
• Built-in QoS: Prioritizes bandwidth and supported packets to reduce latency for critical applications during heavy network use.
• Multi-OS support: Compatible with Windows 10/8.1/8/7 and Linux Kernel 4.4/4.2/3.6/3.2 for flexible integration.

Who It's For

The ASUS XG-C100C is best for home professionals, creative users, and small office IT setups that need a cost-effective route to 10Gbps LAN performance for large backups, networked video work, or fast NAS access. It is particularly useful where existing copper cabling can be used, avoiding the cost of fiber upgrades.

Those who should look elsewhere include users who need multi-port aggregation on a single card, laptops without spare PCI-E slots, or environments where extreme long-distance fiber runs are required; also buyers who require rock-solid, enterprise-class stability may prefer vendor options with extended firmware and support warranties.

Pros & Cons

Pros

• Very fast wired transfers when the network and endpoints support 10Gbps.
• Simple upgrade path using standard RJ-45 cabling and a PCI-E x4 slot.
• Works across Windows and several Linux kernel versions, making it flexible for mixed-OS setups.
• Built-in QoS helps maintain performance for prioritized traffic.

Cons

• Some customers report inconsistent stability and mixed speed results on certain systems and network devices.
• Single-port design limits use cases where multiple 10G ports or port aggregation are needed.

Specifications

Form factor	PCI-E x4 card
Port	Single RJ-45 10GBase-T
Max speed	10Gbps (backward compatible)
Backward compatibility	10/5/2.5/1Gbps and 100Mbps
OS support	Windows 10/8.1/8/7; Linux Kernel 4.4/4.2/3.6/3.2
Built-in features	Quality-of-Service (QoS)
Cable type	Standard copper network cables (e.g., Cat6a/Cat7 recommended)

Our Verdict

The ASUS XG-C100C is a budget-friendly, practical way to bring 10Gbps copper networking to a desktop, offering broad backward compatibility and simple installation. It represents good value for users who can leverage single-port 10G speeds, though buyers should verify driver compatibility and test stability in their specific hardware and switch environments before large deployments.

Frequently Asked Questions

Will this card use my existing ethernet cable?
The card uses a standard RJ-45 copper port and will work with existing cables, but Cat6a or Cat7 is recommended to reach reliable 10Gbps speeds.

Which operating systems are supported?
The card supports Windows 10/8.1/8/7 and Linux with kernels 4.4, 4.2, 3.6 and 3.2 according to the manufacturer.

Can I aggregate this with other ports?
It is a single-port card, so port aggregation requires another compatible NIC or switch that supports link aggregation.