PCIe Interface: Voltage 3.3V ± 9%, Insertion Force 30-80N

Q: 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.

Q: 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.

Q: 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).

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

Parameter	Typical range	Notes & selection driver
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)

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO/IEC 11801, PCI-SIG PCI Express Base Specification, IEC 61076, JEDEC JESD22

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.

View Product Details

GPU Accelerator

A specialized hardware component designed to accelerate graphics processing and parallel computing tasks within industrial edge computing systems.

View Product Details

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

Typical Suppliers & Equivalents

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of PCIe Interface

Manufacturer profiles associated with PCIe Interface.

Sourcing PCIe Interface from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Dielectric Layer

Insulating layer in surface mount capacitors that stores electrical energy through polarization.

Optical Window

Transparent optical component for light transmission in polycarbonate lens housings

PCB Substrate

PCB substrate is the foundational insulating layer that provides mechanical support and electrical connectivity for electronic components in high-speed memory modules.

Edge Connector

Edge connector is a printed circuit board (PCB) connector that mates with the edge of another PCB, commonly used in high-speed memory modules for reliable electrical connections.

Frequently Asked Questions

What is the difference between PCIe 3.0 and PCIe 4.0?