Would this work with a crossover cable, so you can avoid the (ridiculous) expense of a 10G switch if you wanted to connect only two PCs together?

The TP-Link TL-SX105 5-port 10Ggps is available now in late 2021 at a not quite so ridiculous expense of $320.

Will i get 10g speed over pcie 2.0?

PCIe1 is 250MB/sec per lane, PCIe2 is 500MB/sec per lane, PCIe3 is 800MB/sec per lane. So an x4 PCIe2 slot has..... 2Gb/sec transfer capability. 10gbe is 1.2Gb/sec transfer speeds, which falls nicely within a PCIe x4 slot. If you're computer can drive data that quickly is another question. A single consumer SATA SSD can only do 400-500MB/sec , and SATA3 can only do 600MB maximum, which is under the speed of the 10gbe. So unless you have a RAID setup with SSDs, you cannot exceed the ethernet connection. Or, a nice NVMe m.2 drive can do 3600MB/sec easily, which will hurt the 10gbe connection.

can this work as a 10gigabit connection in between 2 systems if both have one of these like from a file server to a workstation pc

Yes. That's exactly how I'm using a pair of them, between a Linux file server and desktop. I manually configured IP addresses and routes.

Is this card low profile? does it come with the low profile bracket?

The card comes with a standard size bracket but a low profile bracket is in the box.

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ASUS XG-C100C 10G Network Adapter PCI-E x4 Card with Single RJ-45 Port and Built-in QoS for use with Windows 10/8.1/8/7 and Linux Kernel 4.4/4.2/3.6/3.2 (XG-C100C)

ASUS XG-C100C 10G Network Adapter PCI-E x4 Card with Single RJ-45 Port and Built-in QoS for use with Windows 10/8.1/8/7 and Linux Kernel 4.4/4.2/3.6/3.2 (XG-C100C)

Product ID: 64925647

Details

Brand
ASUS
Colour
Grey Red
Compatible devices
Desktop Laptop
Data link protocol
Gigabit
Data transfer rate
10000 Megabits
EU Spare Part Availability Duration
3 Years

⚡10Gbps blazing speed

🔄Backward compatible 10/5/2.5/1Gbps

🖧RJ45 copper cable upgrade

Description

🚀 Upgrade your network, upgrade your hustle!

BLAZING 10 GBPS SPEED - Experience data transfers up to 10X faster than standard gigabit Ethernet—perfect for bandwidth-heavy workflows and streaming.
RJ 45 PORT FOR EASY UPGRADE - Upgrade your desktop to ultra-fast 10Gbps networking using standard copper cables—no costly fiber optics needed.
SEAMLESS BACKWARD COMPATIBILITY - Supports multiple network speeds (10/5/2.5/1Gbps & 100Mbps) ensuring smooth integration with your existing infrastructure.
PLUG PLAY WITH WINDOWS LINUX - Effortlessly integrates with Windows 7-10 and Linux Kernels 3.2 to 4.4 for versatile OS support.
BUILT IN QO S FOR PRIORITIZED PERFORMANCE - Optimize your bandwidth with Quality-of-Service technology to prioritize gaming and critical data packets for lag-free experiences.

The ASUS XG-C100C is a PCI-E x4 network adapter delivering hyper-fast 10Gbps speeds with full backward compatibility across multiple Ethernet standards. Featuring a standard RJ45 port, it allows easy upgrades using existing copper cables. Compatible with Windows 7 through 10 and Linux Kernels 3.2 to 4.4, it supports flexible OS integration. Built-in QoS technology ensures prioritized bandwidth for smooth gaming and data-intensive tasks, making it an essential upgrade for professionals demanding speed and reliability.

Specifications

ASIN	B072N84DG6
Best Sellers Rank	72,325 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 250 in Network Cards
Box Contents	support CD (user manual and ultility), XG-C100C 10G PCI_E Network Adapter, Warranty card, Quick start guide
Brand	ASUS
Brand Name	ASUS
Color	Red, Grey
Colour	Red, Grey
Compatible Devices	Laptop, Desktop
Compatible Operating System Family	Windows
Compatible devices	Laptop, Desktop
Customer Reviews	4.2 out of 5 stars 720 Reviews
Data Link Protocol	Gigabit Ethernet
Data Transfer Rate	10000 Megabits Per Second
Data link protocol	Gigabit Ethernet
EU Spare Part Availability Duration	3 Years
Global Trade Identification Number	04712900620078, 00889349620045
Hardware Interface	Ethernet
Hardware interface	Ethernet
Item Dimensions L x W x H	12L x 8.5W x 2.1H centimetres
Item Type Name	ASUS XG-C100C 10G Network Adapter PCI-E x4 Card with Single RJ-45 Port (XG-C100C)
Item Weight	0.2 Pounds
Manufacturer	ASUS Computer International Direct
Manufacturer Part Number	XG-C100C
Minimum Required Operating System Version	Windows 8.1, Windows 8, Windows 7, Windows 10
Model Number	XG-C100C
Number of Items	1
Number of Packs	1
Product dimensions	12L x 8.5W x 2.1H centimetres
UPC	889349620045 689341096318
Unit Count	1.0 count

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