# low-profile expansion card

> reduced-size computer expansion card form factor

**Wikidata**: [Q1872557](https://www.wikidata.org/wiki/Q1872557)  
**Source**: https://4ort.xyz/entity/low-profile-expansion-card

## Summary
A low-profile expansion card is a reduced-size form factor designed for desktop and server computer expansion slots. It is a subclass of the standard desktop computer expansion card, engineered to fit into smaller spaces or low-profile cases. This form factor allows for hardware expansion in compact systems while adhering to specifications typically associated with the PCI-SIG standards.

## Key Facts
*   **Classification:** It is a distinct **form factor** and is categorized as a type of **small form factor** (SFF) hardware.
*   **Hierarchy:** It is a **subclass** of the "desktop computer expansion card" class.
*   **Specification:** The form factor belongs to the group of specifications managed by **PCI-SIG** for expansion cards in desktop and server environments.
*   **Mounting:** The card can be mounted in a standard-profile slot using an attached adapter bracket.
*   **Alternate Names:** It is also known as a low-profile card, LP card, LP expansion card, or specifically as low-profile PCI/LP PCIe cards.
*   **Google Knowledge Graph ID:** /g/120_49w0.

## FAQs
### Q: What is the primary difference between a low-profile card and a standard card?
A: A low-profile expansion card is a reduced-size version of a standard desktop expansion card. While standard cards are built for full-size towers, low-profile cards are designed to fit into smaller form factor chassis.

### Q: Can a low-profile card be installed in a standard desktop computer?
A: Yes, low-profile cards often include an attached adapter that allows them to be securely mounted in a standard-profile slot.

### Q: What types of expansion standards are available in this form factor?
A: This form factor applies to various expansion standards, most notably referred to as low-profile PCI cards and low-profile PCIe cards.

## Why It Matters
The low-profile expansion card is a critical component in the evolution of computer hardware miniaturization. As computing demands shifted towards smaller, more efficient machines—such as Home Theater PCs (HTPCs), compact workstations, and density-optimized servers—the physical volume of standard expansion cards became a limiting factor.

By utilizing a reduced-size form factor, hardware manufacturers can provide essential connectivity, graphics, and processing power to systems that cannot accommodate full-height cards. This form factor solves the problem of expandability in confined spaces, ensuring that small form factor computers remain versatile and functional for specialized tasks. Furthermore, the inclusion of adapters allows these cards to bridge the gap between compact and standard builds, offering flexibility for system integrators and upgraders.

## Notable For
*   Being a **reduced-size** solution compared to standard desktop expansion cards.
*   Enabling hardware expansion in **small form factor (SFF)** and compact server builds.
*   Providing a standard defined under the broader umbrella of **PCI-SIG** specifications.
*   Offering versatility through the use of **mounting adapters** for compatibility with standard slots.
*   Being identifiable by multiple specific aliases, including **LP card** and **low-profile PCIe card**.

## Body
### Definition and Classification
The low-profile expansion card is defined as a reduced-size computer expansion card form factor. Structurally, it is an "instance of" a form factor and is classified as a "subclass of" the desktop computer expansion card. It falls under the broad category of small form factor hardware, designed to minimize the physical footprint of internal computer components.

### Technical Specifications and Compatibility
These cards are part of a group of form factors specified by PCI-SIG, the organization responsible for the PCI standard. While physically smaller, they are electrically compatible with standard slots.
*   **Mounting:** To facilitate installation in various case sizes, the form factor often utilizes an attached adapter. This hardware feature allows the card to be mounted in a standard-profile slot, ensuring it can be used in both low-profile and full-size systems.
*   **Visual Identification:** Visually, these cards are characterized by their reduced height compared to standard brackets. Examples include specific hardware models like the `AOC-S3108L-H8IR`, which serve as visual references for this form factor in knowledge bases.

### Nomenclature
The entity is known by several synonyms in technical documentation and commerce. These aliases include:
*   Low-profile card
*   Low-profile PCI card
*   Low-profile PCIe card
*   LP expansion card
*   LP card
*   LP PCI card
*   LP PCIe card