INDUSTRY COMPONENT

PCIe Interface

PCIe interface is a high-speed serial computer expansion bus standard for connecting peripheral components to a computer motherboard, commonly used in GPUs for data transfer.

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Component Specifications

Definition
The PCI Express (PCIe) interface is a high-speed serial computer expansion bus standard that replaces older PCI, PCI-X, and AGP bus standards. It uses point-to-point serial links called lanes, with each lane consisting of two differential signaling pairs (one for transmitting, one for receiving). PCIe interfaces in GPUs typically use x16 configurations (16 lanes) to provide maximum bandwidth for graphics data transfer between the GPU and CPU/memory. The interface supports hot-plugging, power management, and quality of service features.
Working Principle
PCIe operates using a layered protocol architecture with physical, data link, and transaction layers. Data is transmitted serially through differential pairs in full-duplex mode, with each lane providing dedicated bandwidth. The interface uses packet-based communication with embedded clock signals, allowing for scalable performance through lane aggregation (x1, x4, x8, x16 configurations). Error detection and correction mechanisms ensure data integrity during high-speed transfers.
Materials
Gold-plated copper contacts (typically 30μ" gold over 50-100μ" nickel), FR-4 glass epoxy PCB substrate, high-temperature plastic housing (LCP, PPS, or PBT), stainless steel or brass retention mechanisms, tin-lead or lead-free solder.
Technical Parameters
  • Voltage 3.3V ± 9%
  • Interface Type PCI Express
  • Insertion Force 30-80N
  • Durability Cycles 50+ mating cycles
  • Contact Resistance < 30 mΩ
  • Data Rate (Gen 4.0) 16 GT/s per lane
  • Common Configurations x1, x4, x8, x16
  • Operating Temperature 0°C to 85°C
  • Bandwidth (x16 Gen 4.0) 31.5 GB/s (bidirectional)
Standards
ISO/IEC 11801, PCI-SIG PCI Express Base Specification, IEC 61076, JEDEC JESD22

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for PCIe Interface.

PCI Express interface GPU connector high-speed bus computer expansion slot PCIe x16 serial data transfer graphics card interface PCIe Interface PCIe Interface in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Graphics Processing Unit

A specialized electronic circuit designed to rapidly manipulate and alter memory to accelerate the creation of images in a frame buffer intended for output to a display device.

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Engineering Analysis

Risks & Mitigation
  • Signal integrity degradation at high speeds
  • Mechanical wear from repeated insertion/removal
  • Thermal management issues
  • Electromagnetic interference
  • Compatibility issues between generations
  • Bent or damaged pins
FMEA Triads
Trigger: Poor contact alignment during installation
Failure: Intermittent connection or complete failure
Mitigation: Implement guided insertion mechanisms, visual alignment markers, and training for proper installation procedures
Trigger: Thermal expansion mismatch between materials
Failure: Contact separation under thermal cycling
Mitigation: Use materials with similar coefficients of thermal expansion, implement thermal management solutions
Trigger: Electromagnetic interference from adjacent components
Failure: Data corruption or signal degradation
Mitigation: Implement proper shielding, ground planes, and signal integrity testing during design

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Contact position tolerance: ±0.15mm, PCB pad alignment: ±0.1mm, Insertion depth: ±0.5mm
Test Method
PCI-SIG compliance testing, signal integrity analysis (eye diagram, jitter measurement), mechanical durability testing (insertion/extraction cycles), thermal cycling testing, electromagnetic compatibility testing

Buyer Feedback

★★★★☆ 4.9 / 5.0 (15 reviews)

"Testing the PCIe Interface now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this PCIe Interface meets all ISO standards."

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Frequently Asked Questions

What is the difference between PCIe 3.0 and PCIe 4.0?

PCIe 4.0 doubles the data rate per lane to 16 GT/s compared to PCIe 3.0's 8 GT/s, effectively doubling bandwidth while maintaining backward compatibility with previous generations.

Can a PCIe x16 card work in a PCIe x8 slot?

Yes, PCIe cards are generally backward and forward compatible. A PCIe x16 card will physically fit and function in a PCIe x8 slot, but will operate at x8 bandwidth.

What factors affect PCIe interface performance in GPUs?

Key factors include PCIe generation (3.0, 4.0, 5.0), number of lanes (x16 optimal for GPUs), motherboard chipset capabilities, and system cooling (thermal throttling can affect signal integrity).

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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