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Is PCIe 5.0 Worth It? The Benefits of PCIe 5.0 (2023)

With processors now available from Intel and AMD that support PCIe 5.0, we'll discuss whether it's worth upgrading for graphics card and storage performance.

Is PCIe 5.0 Worth It? The Benefits of PCIe 5.0 (2023) Kevin Jones / TechReviewer

Last Updated: March 18, 2023

Written by Kevin Jones

With each version of PCI-Express roughly doubling the bandwidth available to devices, you may be wondering whether it's worth the upgrade. Let's dig into the details.

Best Intel PCIe 5.0 CPU
Photo of the Intel Core i9-13900K Intel Core i9-13900K Check Price on Amazon Amazon Affiliate Link
Best AMD PCIe 5.0 CPU
Photo of the AMD Ryzen 9 7950X AMD Ryzen 9 7950X Check Price on Amazon Amazon Affiliate Link

PCIe 5.0 Benefits

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Current graphics cards typically don't consume the total bandwidth of PCIe 4.0, so the upgrade to 5.0, by itself, won't provide a massive boost to graphics performance.

However, upgrading to the latest generate of CPUs can provide a boost from:

  • Support for the higher speed DDR5 memory
  • CPUs with more cores and threads, which are better optimized
  • PCIe 5.0 lanes and more PCIe 4.0 lanes for M.2 NVMe SSD devices
  • More M.2 storage device bandwidth for Intel 12th and 13th Gen CPUs (DMI 4.0 has double the throughput of DMI 3.0)

The latest M.2 NVMe SSDs can do an excellent job of nearly saturating a PCIe 4.0 connection. We recommend upgrading to get as many PCIe 4.0 lanes as possible for M.2 devices. It seems counter-intuitive, but upgrading to a CPU that supports PCIe 5.0 provides more PCIe 4.0 lanes.

PCIe 5.0 graphics cards won't need to use as many lanes in the future, making more lanes available for other devices via PCIe add-in card slots.

Bandwidth

The key benefit of upgrading to PCI-Express 5.0 is the increased bandwidth. Each version of PCIe roughly doubles the bandwidth available per lane.

PCI-Express 5.0 vs. 4.0 Speeds (Rounded)
PCIe 4.0 PCIe 5.0
x1 Bandwidth 2 GB/s 4 GB/s
x2 Bandwidth 4 GB/s 8 GB/s
x4 Bandwidth 8 GB/s 16 GB/s
x8 Bandwidth 16 GB/s 32 GB/s
x16 Bandwidth 32 GB/s 63 GB/s

Any devices which were designed for PCIe 5.0 can benefit from the increase in available bandwidth.

Devices designed for PCIe 5.0 could mean faster storage speeds (video and game loading) and faster graphics (video games and rendering).

However, some devices may not even be reaching the limits of PCIe 4.0 or 3.0 yet. The low bandwidth usage by some devices means that it's only necessary to upgrade if:

  • You are using the latest and fastest storage devices and video cards that use the PCIe 5.0 or 4.0 lanes.
  • You want to free up PCIe lanes by using PCIe 5.0 devices, which won't need as many lanes for the same bandwidth.
  • You want to future-proof your system.

Storage

The component which can benefit the most from fast PCIe speeds is NVMe storage. The latest top-performing NVMe SDD and add-in card (AIC) storage devices can benefit from both the higher throughput and the throughput available per lane.

Currently, only PCIe 4.0 SSDs are on the market. To make use of PCIe 5.0 SSD speeds, you'd likely need to use a PCIe SSD add-in card, as most M.2 slots only support PCIe 4.0 speeds.

Lanes

With each PCIe version doubling the bandwidth per lane, newer devices can reduce the number of needed lanes. For example, if even the top tier of graphics cards no longer need the full 16 lanes to meet their needs, they can use 8 or fewer lanes. By using fewer lanes, it frees up more lanes for other devices. Using fewer lanes is important because CPUs provide a limited number of lanes, which need to be distributed among the devices.

The same is valid for storage. If your storage devices no longer need as many lanes, PCIe add-in card (AIC) adapters can connect more NVMe M.2 SSDs.

For networking, a single lane could now provide enough bandwidth for 10 Gbps Ethernet.

Future-Proofing

If you are building a new system, it may make sense to do the upgrade to 5.0. In particular, future graphics cards and storage devices may further take advantage of this available bandwidth. In this case, you might consider how long you plan to use this computer. For example, will you upgrade your storage and graphics card over the next few years or wait to replace the entire system?

Is PCIe 5.0 Worth It for Gaming?

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It is worth upgrading to the PCIe 5.0 generation of CPUs for gaming if you:

  • Want to experience peak performance by using the fast DDR5 memory and CPUs with more available cores
  • Can make use of the PCIe 5.0 M.2 storage slots for loading games
    • Intel's 12th/13th Gen Core 600/700-series chipsets use a DMI 4.0 interface which is twice as fast as the previous generation, allowing for more storage throughput.
  • Have a PCIe 4.0 (or 5.0) graphics card, which may see a slight performance improvement
  • Want to future-proof your system
  • Want to free up PCIe lanes for other devices by using the latest PCIe devices

Check out my Recommended Intel and Recommended AMD PCIe 5.0 CPUs and motherboards below.

Check out the complete list of CPUs supporting PCIe 5.0 in Which Intel and AMD CPUs Support PCIe 5.0?

Which Desktop and Workstation PCIe 5.0 CPUs Are Available?

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Intel's 12th and 13th generation Core processors, code-named "Alder Lake" and "Raptor Lake," support PCIe 5.0. Intel 12th and 13th Gen Core CPUs use an LGA 1700 socket.

AMD Ryzen 7000 processors, released in Q4 2022, also support PCIe 5.0. AMD Ryzen 7000 CPUs use an AM5 socket.

Check out my Recommended Intel and Recommended AMD PCIe 5.0 CPUs and motherboards below.

Check out the complete list of CPUs supporting PCIe 5.0 in Which Intel and AMD CPUs Support PCIe 5.0?

Which Motherboards Support PCIe 5.0?

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AMD Motherboards

For maximum PCIe 5.0 support with AMD CPUs, use a motherboard with the X670E or B650E chipset. The X670 chipset only supports PCIe 4.0 for x8 and x16 slots.

Get motherboard recommendations
for a specific PCIe 5.0 AMD CPU:
AMD 600-Series Desktop Chipsets
X670E X670 B650E B650
Release Date September 2022 September 2022 October 2022 October 2022
CPU Overclocking Yes Yes Yes Yes
PCIe Lanes (Graphics)

One x16 at PCIe 5.0 speeds

or Two x8 at PCIe 5.0 speeds

One x16 at PCIe 4.0 speeds

or Two x8 at PCIe 4.0 speeds

One x16 at PCIe 5.0 speeds

or Two x8 at PCIe 5.0 speeds

One x16 at PCIe 4.0 speeds

or Two x8 at PCIe 4.0 speeds

PCIe Lanes (NVMe)

One x4 at PCIe 5.0 speeds (via CPU) and up to one x4 at PCIe 5.0 speeds (via chipset)

One x4 at PCIe 5.0 speeds (via CPU) and up to one x4 at PCIe 5.0 speeds (via chipset)

One x4 at PCIe 5.0 speeds (via CPU) and up to one x4 at PCIe 5.0 speeds (via chipset)

 One x4 at PCIe 4.0 speeds (via CPU)
Usable PCIe Lanes

Up to 44 total

24 at PCIe 5.0 speeds

Up to 44 total

8 at PCIe 5.0 speeds

Up to 36 total

24 at PCIe 5.0 speeds

Up to 44 total

0 at PCIe 5.0 speeds

10 Gbps USB (USB 3.2 Gen 2)

 12 12 6 6

20 Gbps USB-C (USB 3.2 Gen 2x2)

 2 2 1 1
Max SATA Ports 8 8 4 4
Photo of the ASUS ROG Strix X670E-E Gaming ASUS ROG Strix X670E-E Gaming Check Price on Amazon Amazon Affiliate Link

Intel Motherboards

For compatibility with Intel's 12th and 13th Gen Core CPUs, you'll need to use a motherboard with a Z790, H770, B760 Z690, H670, B660, or H610 chipset.

The W680 and Q670 chipsets are intended for workstation and business use cases; their availability in stand-alone motherboards is limited.

For 12th and 13th Gen Intel Core CPUs, PCIe 5.0 support means either one x16 or two x8 PCIe slots can run at PCIe 5.0 speeds for graphics or storage purposes. The CPUs provide four additional PCIe 4.0 lanes (e.g., an x4 slot) that you can only use for storage devices.

Get motherboard recommendations
for a specific 13th Gen Core CPU:
Get motherboard recommendations
for a specific 12th Gen Core CPU:
Intel 700 and 600 Series Desktop Chipsets
Z790 H770 B760 Z690 H670 B660 H610 W680 Q670
Recommended Usage For Enthusiast Gamer PCs For General Home and Gaming PCs For Budget PCs For Enthusiast Gamer PCs For General Home and Gaming PCs For Budget PCs For Barebones PCs For High-End Creative/Engineering Workstations For Nicer Business PCs
Motherboard Availability Limited Limited
Launch Date Q4 2022 Q1 2023 Q1 2023 Q4 2021 Q1 2022 Q1 2022 Q1 2022 Q1 2022 Q1 2022

CPU Overclocking See Exceptions: MOTHERBOARD

 Yes No No Yes Yes Yes No Yes No
Memory Overclocking Yes Yes Yes Yes Yes Yes No Yes No
PCIe 5.0 Slots via Processor One x16 or Two x8 One x16 or Two x8 One x16 One x16 or Two x8 One x16 or Two x8 One x16 One x16 One x16 or Two x8 One x16 or Two x8
PCIe 4.0 Slots via Processor One x8 One x4 One x4 One x4 One x4 One x4 None One x4 One x4
PCIe 4.0 Lanes via Chipset Up to 20 Up to 16 Up to 10 Up to 12 Up to 12 Up to 6 None Up to 12 Up to 12
PCIe 3.0 Lanes via Chipset Up to 8 Up to 8 Up to 4 Up to 16 Up to 12 Up to 8 8 Up to 16 Up to 12
Memory Channels 2 2 2 2 2 2 1 2 2
Integrated Wireless Wi-Fi 6E AX211 (Gig+) Wi-Fi 6E AX211 (Gig+) Wi-Fi 6E AX211 (Gig+) Wi-Fi 6E AX211 (Gig+) Wi-Fi 6E AX211 (Gig+) Wi-Fi 6E AX211 (Gig+) Wi-Fi 6E AX211 (Gig+) Wi-Fi 6E AX211 (Gig+) Wi-Fi 6E AX211 (Gig+)
DMI 4.0 Lanes 8 8 4 8 8 4 4 8 8
USB 3.2 Gen 2x2 (20 Gbps) Up to 5 Up to 2 Up to 2 Up to 4 Up to 2 Up to 2 None Up to 4 Up to 4
USB 3.2 Gen 2x1 (10 Gbps) Up to 10 Up to 4 Up to 4 Up to 10 Up to 4 Up to 4 Up to 2 Up to 10 Up to 8
USB 3.2 Gen 1x1 (5 Gbps) Up to 10 Up to 8 Up to 6 Up to 10 Up to 8 Up to 6 Up to 4 Up to 10 Up to 10
USB 2.0 Ports 14 14 12 14 14 12 10 14 14
Wi-Fi 6E Yes Yes Yes Yes Yes Yes Yes Yes Yes
SATA 3.0 Ports Up to 8 Up to 8 Up to 4 Up to 8 Up to 8 Up to 4 Up to 4 Up to 8 Up to 8
PCIe RAID 0, 10, 15 0, 10, 15 None 0, 1, 5, 10 0, 1, 5, 10 None None 0, 1, 5, 10 0, 1, 5, 10
SATA RAID 0, 10, 15 0, 10, 15 0, 10, 15 0, 1, 5, 10 0, 1, 5, 10 0, 1, 5, 10 None 0, 1, 5, 10 0, 1, 5, 10

MOTHERBOARD The motherboard must support overclocking to use overclocking capabilities. Motherboards with Z-prefixed chipsets more commonly support overclocking.

Photo of the ASUS ROG Strix Z790-E Gaming WiFi 6E ASUS ROG Strix Z790-E Gaming WiFi 6E Check Price on Amazon Amazon Affiliate Link

Note that the chipsets don't provide PCIe 5.0 lanes for M.2 storage devices. PCIe 5.0 is only available for the PCI-Express slots connected directly to the CPU. However, the chipsets do use a new DMI 4.0 link which is twice as fast as the 3.0 link used by the 500-series chipsets.

Photo of the GIGABYTE Z690 AORUS Master GIGABYTE Z690 AORUS Master Check Price on Amazon Amazon Affiliate Link
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Best Intel 13th Gen High-Performance CPU and Motherboard

  • Our recommended Intel 13th gen high-performance enthusiast CPU: Photo of the Intel Core i9-13900K Intel Core i9-13900K Check Price on Amazon Amazon Affiliate Link
    • Up to 5.8 GHz max-turbo stock speed: perfect for games, video editing, and high-intensity tasks.
    • 24 cores (8 Performance + 16 Efficiency): This combination makes it a great all-around system that can handle any task you throw at it.
    • Virtualization features make it great for running virtual machines.
    • Check the latest price of the Intel Core i9-13900K on Amazon (affiliate link).
    • For the Intel Core i9-13900K CPU, you'll need a motherboard with overclocking support to overclock the CPU. Motherboards with the Z790 chipset typically support CPU overclocking. Otherwise, you can use a motherboard with Intel's other 600-series desktop chipsets (e.g., Z690, H670, B660, H610).
  • Our recommended motherboard to pair with the i9-13900K: Photo of the MSI MEG Z790 ACE Gaming Motherboard MSI MEG Z790 ACE Gaming Motherboard Check Price on Amazon Amazon Affiliate Link
    • PCIe 5.0 support
    • It supports up to 128 GB of DDR5 memory (DDR5 provides the fastest memory speeds)!
    • 2.5 Gbps Ethernet port is faster than any home Internet speed available with tons of room to spare for file transfers.
    • Wi-Fi 6E makes it easy to reach the fastest speeds and future-proof your Wi-Fi system.
    • Bluetooth 5.3 is great for streaming music to Bluetooth headphones.
    • Five x4 NVMe M.2 slots, which is fantastic! One of these supports PCIe 5.0 speeds, and the rest run at PCIe 4.0 speeds.
    • USB 3.2 Gen 2x2 offers 20 Gbps USB speeds!
    • Check the latest price of the MSI MEG Z790 ACE Gaming Motherboard on Amazon (affiliate link).

Best Runner-Up Intel 13th Gen CPU and Motherboard

  • Our recommended Intel 13th gen high-performance CPU: Photo of the Intel Core i7-13700K Intel Core i7-13700K Check Price on Amazon Amazon Affiliate Link
    • Up to 5.4 GHz max-turbo stock speed: perfect for games, video editing, and high-intensity tasks.
    • 16 cores (8 Performance + 8 Efficiency): This combination makes it a great all-around system that can handle almost any task.
    • Virtualization features make it great for running virtual machines.
    • Check the latest price of the Intel Core i7-13700K on Amazon (affiliate link).
    • For the Intel Core i7-13700K CPU, you'll need a motherboard with overclocking support to overclock the CPU. Motherboards with the Z790 chipset typically support CPU overclocking. Otherwise, you can use a motherboard with Intel's other 600-series desktop chipsets (e.g., Z690, H670, B660, H610).
  • Our recommended motherboard to pair with the i7-13700K: Photo of the ASUS ROG Strix Z790-E Gaming WiFi 6E ASUS ROG Strix Z790-E Gaming WiFi 6E Check Price on Amazon Amazon Affiliate Link
    • PCIe 5.0 support
    • It supports up to 128 GB of DDR5 memory (DDR5 provides the fastest memory speeds)!
    • 2.5 Gbps Ethernet port is faster than any home Internet speed available with tons of room to spare for file transfers.
    • Wi-Fi 6E makes it easy to reach the fastest speeds and future-proof your Wi-Fi system.
    • Bluetooth 5.3 is great for streaming music to Bluetooth headphones.
    • Five x4 NVMe M.2 slots, which is fantastic! One of these supports PCIe 5.0 speeds, and the rest run at PCIe 4.0 speeds.
    • USB 3.2 Gen 2x2 offers 20 Gbps USB speeds!
    • Check the latest price of the ASUS ROG Strix Z790-E Gaming WiFi 6E on Amazon (affiliate link).

Best Value Intel 13th Gen CPU and Motherboard

  • Our recommended Intel 13th gen best value CPU: Photo of the Intel Core i5-13600K Intel Core i5-13600K Check Price on Amazon Amazon Affiliate Link
    • Up to 5.1 GHz max-turbo stock speed: great for games, video editing, and high-intensity tasks.
    • 14 cores (6 Performance + 8 Efficiency): This combination makes it a great all-around system that can handle almost any task.
    • Virtualization features make it great for running virtual machines.
    • Check the latest price of the Intel Core i5-13600K on Amazon (affiliate link).
  • Our recommended Value motherboard to pair with the i5-13600K: Photo of the MSI MAG B760 Tomahawk WiFi DDR4 Gaming Motherboard MSI MAG B760 Tomahawk WiFi DDR4 Gaming Motherboard Check Price on Amazon Amazon Affiliate Link
    • PCIe 5.0 support
    • It supports up to 128 GB of DDR4 memory.
    • 2.5 Gbps Ethernet port is faster than any home Internet speed available with tons of room to spare for file transfers.
    • Wi-Fi 6E makes it easy to reach the fastest speeds and future-proof your Wi-Fi system.
    • Bluetooth 5.3 is great for streaming music to Bluetooth headphones.
    • Three x4 NVMe M.2 slots, which is fantastic! These slots all support PCIe 4.0 speeds.
    • USB 3.2 Gen 2x2 offers 20 Gbps USB speeds!
    • Check the latest price of the MSI MAG B760 Tomahawk WiFi DDR4 on Amazon (affiliate link).

Best Intel 12th Gen High-Performance CPU and Motherboard

  • Our recommended Intel 12th gen high-performance enthusiast CPU: Photo of the Intel Core i9-12900K Processor 16 Cores (8P+8E) up to 5.2 GHz Intel Core i9-12900K Processor 16 Cores (8P+8E) up to 5.2 GHz Check Price on Amazon Amazon Affiliate Link
    • Up to 5.2 GHz: perfect for games, video editing, and high-intensity tasks.
    • 16 cores (8 Performance + 8 Efficiency): Quite a few cores considering the frequency! This combination makes it a great all-around system that can handle almost any task.
    • Virtualization features make it great for running virtual machines.
    • Check the latest price of the Intel Core i9-12900K on Amazon (affiliate link).
    • For the Intel Core i9-12900K CPU, you'll need a motherboard with overclocking support to overclock the CPU. Motherboards with the Z690 chipset typically support CPU overclocking. Otherwise, you can use a motherboard with Intel's other 600-series desktop chipsets (e.g., H670, B660, H610).
  • Our recommended motherboard to pair with the i9-12900K: Photo of the GIGABYTE Z690 AORUS Master GIGABYTE Z690 AORUS Master Check Price on Amazon Amazon Affiliate Link
    • PCIe 5.0 support
    • It supports up to 128 GB of DDR5 memory (DDR5 provides the fastest memory speeds)!
    • 10 Gbps Ethernet port is faster than any home Internet speed available with tons of room to spare for file transfers.
    • Wi-Fi 6E makes it easy to reach the fastest speeds and future-proof your Wi-Fi system.
    • Bluetooth 5.2 is great for streaming music to Bluetooth headphones.
    • Four x4 NVMe M.2 slots, which is fantastic! Three of these run at PCIe 4.0 speeds, and one at PCIe 3.0 speeds.
    • USB 3.2 Gen 2x2 offers 20 Gbps USB speeds!
    • Check the latest price of the GIGABYTE Z690 AORUS Master on Amazon (affiliate link).

Best Intel 12th Gen Value CPU and Motherboard

  • Our recommended Intel 12th gen value CPU: Photo of the Intel Core i5-12600K Intel Core i5-12600K Check Price on Amazon Amazon Affiliate Link
    • Less than half the price of the i9-12900K, but still excellent performance at up to 4.9 GHz.
    • 10 cores (6 Performance + 4 Efficiency): This core count makes it suitable for everyday multi-threading tasks, such as having tons of browser windows open.
    • Virtualization features make it great for running virtual machines.
    • Check the latest price of the Intel Core i5-12600K on Amazon (affiliate link).
    • For the Intel Core i5-12600K CPU, you'll need a motherboard with overclocking support to overclock the CPU. Motherboards with the Z690 chipset typically support CPU overclocking. Otherwise, you can use a motherboard with Intel's other 600-series desktop chipsets (e.g., H670, B660, H610).
  • Our recommended motherboard to pair with the i5-12600K: Photo of the GIGABYTE Z690 AORUS PRO GIGABYTE Z690 AORUS PRO Check Price on Amazon Amazon Affiliate Link
    • PCIe 5.0 support
    • It supports up to 128 GB of DDR5 memory!
    • Three NVMe M.2 slots, which is excellent! These all run at PCIe 4.0 speeds.
    • 2.5 Gb Ethernet port is faster than most home Internet speeds with room to spare for file transfers.
    • USB 3.2 Gen 2x2 offers 20 Gbps USB speeds!
    • Check the latest price of the GIGABYTE Z690 AORUS PRO on Amazon (affiliate link).
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Best Feature CPU and Motherboard

Runner-Up CPU and Motherboard

What Is PCI-Express?

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PCI-Express (PCIe) is an electrical bus used in nearly all modern consumer and server PCs. PCIe slots on desktop PCs allow for connecting various expansion boards, including graphics cards, sound cards, video capture cards, network/Wi-Fi cards, storage devices, and more. PCI-Express is the successor of PCI.

PCI-Express is currently the dominant bus for connecting expansion cards and devices (alongside USB, which is used for externally connected devices).

While you may recognize PCI-Express as the name used for the motherboard's expansion ports, the same bus is also used for computer storage interfaces. When PCI-Express is used for storage, the NVM Express (NVMe) storage protocol is typically used. In addition to PCIe slots, motherboards provide a high-speed PCIe connection to devices via connectors such as M.2 and U.2.

Learn more about storage types in Storage Type Comparison: M.2, U.2, NVMe, SATA, SSDs, HDDs

PCIe Slots on a Motherboard PCIe Slots on a Motherboard Eric Kilby

What Are PCI-Express Lanes?

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PCIe lanes are connections between a PCI-Express expansion card or device and the CPU. PCIe lanes often communicate with the CPU via chipsets on the motherboard. Each PCIe lane is composed of 4 wires (two differential pairs).

With naming similar to a road, the number of lanes is referred to as the lane size, or how many lanes wide a link or port uses. A single lane is referred to as x1 or "one lane wide."

The maximum throughput (speed) is multiplied by the number of lanes. An x8 PCIe port has twice the throughput of an x4 port.

Some CPUs and motherboards provide PCI-Express lanes at multiple PCIe versions. In these cases, you can choose which devices need the most bandwidth to decide which should be connected to the highest version PCIe lanes. While laying out your system, keep in mind that PCIe speeds will be based on the lowest PCIe version between the slot/port and the device.

You can insert a PCIe add-in card (AIC) into a slot that supports a higher number of lanes. In this case, it would use up to the number of PCIe lanes that the card has. For example, you could insert an x4 PCIe network card into an x16 PCIe AIC slot, and it would run at full x4 speed.

In various scenarios, a PCIe device may not use the maximum number of lanes for which the device was designed. For example, some motherboards have x8 PCIe ports that are only electrically wired for x4 lanes. In another case, a system may have limited lanes provided by the CPU, distributed based on availability or configuration.

Devices will negotiate the number of lanes to use, based on system availability, and should still perform fine at a reduced overall bandwidth in most cases. Refer to your motherboard's documentation and CPU specifications to determine PCIe lane quantities and allocations.

What Is the Latest Version of PCI-Express?

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The latest available version of PCI-Express is PCIe 5.0. PCIe 5.0 CPUs are available from Intel and AMD.

Intel's 12th and 13th generation Core CPUs currently provide PCIe 5.0 support for CPU lanes (i.e., one x16 or two x8 PCIe slots) and PCIe 4.0/3.0 speeds for the remaining lanes.

AMD's Zen 4-based Ryzen 7000 desktop CPUs are their first to support PCIe 5.0.

PCIe versions such as 3.0, 4.0, and 5.0 are sometimes informally referred to as PCIe Gen 3, PCIe Gen 4, and PCIe Gen 5. This naming is based on them being the third, fourth, and fifth generations of PCI-Express.

PCIe 5.0 graphics cards and storage devices are not currently on the market.

How Fast Is PCIe?

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PCI-Express speeds are based on the PCI-Express version and the number of lanes used. One lane is referred to as x1, two lanes as x2, etc. PCI-Express technically supports up to a width of x32. However, most consumer motherboards have some set of these PCIe widths: x1, x2, x4, x8, x16.

PCI-Express Speeds (Rounded)
PCIe 4.0 PCIe 5.0
x1 Bandwidth 2 GB/s 4 GB/s
x2 Bandwidth 4 GB/s 8 GB/s
x4 Bandwidth 8 GB/s 16 GB/s
x8 Bandwidth 16 GB/s 32 GB/s
x16 Bandwidth 32 GB/s 63 GB/s

Intel's 12th generation CPUs currently provide PCIe 5.0 support for CPU lanes (i.e., one x16 or two x8 PCIe slots) and PCIe 4.0/3.0 speeds for the remaining lanes.

The bandwidth for each PCIe 5.0 lane is 4 GB/s. 4 GB/s per lane means that if you use a PCI-Express 5.0 x16 device, it would have up to 64 GB/s of bandwidth available to it.

NVMe M.2 SSD cards use 2 or 4 lanes, which means they have 4–8 GB/s available to them with PCIe 4.0.

Photo of the Samsung 980 1 TB M.2 SSD Samsung 980 1 TB M.2 SSD Check Price on Amazon Amazon Affiliate Link

NVMe PCIe add-in cards can use up to 16 lanes in an x16 slot, thus having up to 32 GB/s of bandwidth available to them with PCIe 4.0.

In comparison, PCIe 3.0 has half of the bandwidth of PCIe 4.0.

PCI-Express 3.0 Speed (Rounded)
x1 Bandwidth 1 GB/s
x2 Bandwidth 2 GB/s
x4 Bandwidth 4 GB/s
x8 Bandwidth 8 GB/s
x16 Bandwidth 16 GB/s

Other Considerations When Building a PC

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Want to brush up on other new technologies to consider when building a computer? Check out these articles:

Learn More About PCI-Express

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Want to brush up on the latest PCIe products, versions, and features? Check out the articles in this PCI-Express series:

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