PCI Express

(redirected from PCle)

PCI Express

A high-speed hardware interface from Intel for connecting peripheral devices. PCI Express (PCIe) was introduced in 2002, and by the mid-2000s, motherboards had at least one PCIe slot for the graphics card. PCIe is also used for hard drives, SSDs, Wi-Fi and Ethernet. Introduced in 2002 as "Third Generation I/O" (3GIO), PCIe superseded both PCI and PCI-X.

Switched Architecture - Multiple Lanes
Rather than the shared bus of PCI, PCIe provides a switched architecture of up to 32 independent, serial "lanes" that can transfer in parallel, designated 1x to 32x. The switch backplane determines the total bandwidth, and cards and motherboards are compatible between versions.

Internal and External for Laptops
A mini version of PCIe was developed for laptops (see Mini PCI Express) and ExpressCard and Thunderbolt interfaces extend PCIe outside the computer (see external GPU). For PCIe/PCI comparisons, see PCI-SIG. See PCI, ExpressCard, Thunderbolt and PCI-X.

                Data TransferPCI Express      (Bytes/Sec)Version      1 Lane      16 Lanes

    1.0        250 MBps     4 GBps
    2.0        500 MBps     8 GBps
    3.0          1 GBps**  16 GBps**
    4.0          2 GBps**  32 GBps**
  ** = rounded


Different Size Slots
PCIe is not compatible with PCI or AGP. Slots are color coded on the motherboard.







Parallel Transfer in Serial Form
Each lane is an independent single-bit serial channel on the PCIe backplane.







A PCIe Motherboard
This Asus motherboard has three x16 PCIe slots for x16, x8 or x4 cards and four x1 slots. (Image courtesy of ASUStek Computer Inc.)







PCIe Replaced AGP for Graphics
The AGP slot gave way to an x16 PCIe slot for the graphics card. (Image courtesy of NVIDIA Corporation.)







PCIe on an M.2 Card
This is a 960GB PCIe SSD contained on an 80x20mm M.2 card. See M.2.
References in periodicals archive ?
Tower model; dual-channel SODIMM DDR4 RAM (upgradable to 32 GB); hot-swappable 3.5-inch SATA 6Gbps bays; 2x M.2 2280 PCIe (Gen 3 x2, 2 GB/s) NVMe SSD slots; 1x 5GBASE-T RJ45 (5G/2.5G/1G/100M) LAN port, 2x Gigabit LAN ports; 2x PCle slots; 1x HDMI 2.0 (4K@60Hz) output; 1x Type-A USB 3.0 port, 2x Type-C USB 3.1 Gen2 10Gbps ports, 2 x Type-A USB 3.1 Gen2 10Gbps ports; 1x 3.5 mm dynamic microphone jack, 1x 3.5mm line-out audio jack; 1x built-in speaker
This SSD works seamlessly with today's current line of next-gen servers that utilize PCle and U.2 blackplanes.
Both frame grabbers support the PCle 3.0 Gen 3 x8 bus, with 6,700MB/s bandwidth.
Meanwhile, Theise and his team used a 'probe-based confocal laser endomicroscopy' or pCLE, to examine living tissue.
Additional upgrades include the latest professional graphics technology from AMD and NVIDIA, Dell Precision Ultra-Speed PCle drives with up to 4x faster performance than traditional SATA SSD storage1 and up to 1TB of DDR4 Memory2 running at 2400MHz speed.
The computer on module is only an 84mm x55 mm form factor and supports onboard 4 GB DDR3L memory, wide voltage range, rich I/O options, and four lanes of PCle interfaces.
The M6e Black Edition has PCle controller chips to allow users to enjoy extraordinary high transfer speed, superior than SATA III via the PCIe Gen II x2 interface.
Endoscope-Based and Probe-Based Confocal Laser Endomicroscopy (eCLE and pCLE).
PCle, USB, DDR, and HDMI are examples of multigeneration technologies where standards bodies have helped ensure widespread adoption and compatibility.
That's exactly what he and his research team discovered, when they sent six different specialists at five different medical institutions recorded videos taken by a probe-based confocal laser endomicroscopy (pCLE) deep inside 25 patients with abnormally narrowed bile ducts.
(7) Another platform, probe-based CLE (pCLE; Mauna Kea Technologies, (8) Newtown, Pennsylvania) uses a fiber-optic probe bundle to convey light from a confocal microscope situated outside the patient to a port in a standard endoscope.