How to check PCIe speed?

When you are building a PC, choosing a motherboard and processor is crucial to the overall performance of your computer. However, what many builders often overlook when picking their processing system is the right number of PCIe lanes.

Having PCIe lanes that match your current and future needs is crucial as it helps reduce the need for an immediate upgrade down the road which we know could be really expensive. For this reason, it’s important to know what and how PCIe works and how to check its speed.

What is PCIe?

What often comes to mind when we think about PCIe is the expansion slots on the motherboard where you would connect or attach the graphics card and other supported devices. But far more than that, the PCIe has more extensive features.

PCIe stands for Peripheral Component Interconnect Express and it is an interface that allows for high-speed components such as SSDs, WiFi cards and graphics cards to connect to your computer system.

The number of PCIe slots in every desktop and laptop computer greatly varies depending on the motherboard. Computers that have high-speed components require more slots to run.

Moreover, the PCIe slots also come in different sizes: x1, x4, x8, x16, and x32, where the number represents the number of lanes a slot has. So a PCIe x1 slot is composed of one lane and is able to move data at one bit per cycle while an x4 slot can move data up to 4 bits per cycle. What this means is that the PCIe slot tells you about the speed your system can move data.

Video: What is PCIe slot

How to check PCIe speed?

Checking your PCIe speed is straightforward. The steps may slightly vary depending on your operating system but for Windows 10, you can follow these steps:

  1. On your Windows Start screen, search for Device Manager and click on it.
  2. From the Device Manager window, right-click on your PCIe device then select Properties.
  3. Open the Details tab. From there, you can find the PCI current link speed and the PCI max link speed. If you tap on the former, you’ll see the current link speed details of the PCI device. For example, if you’ll see 02, it represents Gen2 speed. On the other hand, if you click the latter, it shows the maximum speed your PCIe slot can support. For instance, if you see 03, it means Gen3.

Video: How to check the PCIe version of your motherboard

Q & A

How is PCIe speed calculated?

To better understand about speed in PCIe lanes, you could check this video:

Do PCIe 4.0 SSDs make a significant difference in gaming performance?

To better understand how PCIe 4.0 affects gaming performance, you could check this:

How do I check my motherboard PCIe speed?

Download and install CPU-Z. Once installed, open it and head to the ‘Mainboard’ tab. Under the “Graphic Interface” tab, you’ll see what type of PCIe connection you have, along with its link width. Look for ‘x16’ in ‘Link Width’ and ‘PCI-Express 3.0’ under ‘Version’.

How do I check PCI performance?

The only thing to do in terms of monitoring PCIe from the OS is to use lspci -vvv (or equivalently parse the data, use the source) to collect information on errors, timeouts and retransmit attempts on the PCIe bus.

What speed is PCIe?

PCIe Speeds and Limitations

PCIe Revisionx1 Lanex2 Lanes
1.0/1.1250 MB/s500 MB/s
2.0/2.1500 MB/s1 GB/s
3.0/3.11 GB/s2 GB/s
4.02 GB/s4 GB/s

How do I change PCIe speed in BIOS?


  1. From the System Utilities screen, select System Configuration > BIOS/Platform Configuration (RBSU) > Power Management > Advanced Power Options > Maximum PCI Express Speed and press Enter.
  2. Select a setting and press Enter.
  3. Press F10.

Can you use a PCIe 4.0 card in a 3.0 slot?

A PCIe 4.0 graphics card will work in a PCIe 3.0 motherboard slot at PCIe 3.0 speeds. For PCIe 4.0 graphics cards, maximum graphics throughput can only barely exceed that of PCIe 3.0. For this reason, the benefits of upgrading your motherboard to PCIe 4.0 will be minor.

How do I check my graphics card PCIe lanes?

While running a graphics intensize application, run GPU-Z. It will show the PCIe specs in use.

What is the data rate of PCIe 3.0 x16?

Data Rate: PCIe 3.0 = 1000MB/s, PCIe 2.0 = 500MB/s, PCIe 1.1 = 250MB/s. Total Bandwidth: (x16 link): PCIe 3.0 = 32GB/s, PCIe 2.0 = 16GB/s, PCIe 1.1 = 8GB/s.

How do I know if PCIe 4 is working?

The easiest way to find whether the PCIe slot is working \ is to check in the Device Manager.

  1. Click on the Start/ Windows.
  2. Click on Control Panel and go to Device Manager.
  3. Look for devices with a yellow triangle mark on the side or a red cross mark.
  4. Click on the mark to see what’s wrong with the PCIe slot.

Why is my PCIe running at 8x?

An NVMe SSD installed on your computer could consume some of the PCIe lanes of the CPU, causing your card to run at 8x speed instead of 16x. Unless your operating system is installed on the NVMe SSD, which in most cases is, you could try removing it from the motherboard and check if the issue still persists.

Does PCIe 4.0 matter for gaming?

But while PCIe 4.0 setups outperform 3.0 in synthetic benchmarks, the real-world benefits for gaming are currently minor. Some tests suggest that even running games in 4K with current graphics cards won’t saturate the bandwidth of a PCIe 3.0 x16 slot.

How do I check my PCI slots Windows 10?

Click on the “Motherboard” link located in the navigation pane. The PCI slots on your PC will display under the PCI Data group. The specific type of PCI slot is listed next to “Slot Type” with each PCI entry. For example, “Slot Type – PCI-Express” indicates that your computer uses PCI-Express slots.

Can you put a PCIe 4.0 card in a 5.0 slot?

Similarly, once the PCIe 5.0 interface is widely adopted, you’ll be able to insert a PCIe 4.0 expansion card into a PCIe 5.0 motherboard’s slot, but you’ll be limited by the speeds of PCIe 4.0.

Does 10900K support PCIe 4?

TechRadar Verdict. The Intel Core i9-10900K would be a worthy follow-up to the Core i9-9900K in 2019, but with the AMD Ryzen 4000 series quickly approaching, it doesn’t make any sense to adopt a high-end platform that both falls behind in raw performance and doesn’t support PCIe 4.0.

Can you put a PCIe 3.0 card in a 5.0 slot?

Due to the forward and backward compatibility, a PCIe 3.0 GPU will perform like a PCIe 3.0 GPU card if connected to a PCIe 4.0 (or in the future a PCIe 5.0) slot. The specs of your GPU card do not change.

How many PCIe lanes does a 3070 use?

The Mobo has 5 PCIE slots: Slot 1 is 16 slots | 16 lanes = used for rtx 3080 (no problem) Slot 2 is 4 slots | 1 lane = used for 1660 Super (no problem) Slot 3 is 16 slots | 8 lane = used for rtx 3070 (no problem)

How do you count PCIe lanes?

If you have two PCIe x16 slots and you occupy both with graphics cards, then the PCIe lane count and the bandwidth will be divided equally as such: x8 / x8. If you only have the primary x16 slot occupied (the top x16 slot), then the graphics card would operate at full x16 bandwidth.

Is PCIe 3.0 the same as PCIe 3.0 x16?

The graphics card you want to get tells that PCIe 3.0 × 16 that means PCIe × 16 version 3.0. The size is same, the version 3.0 is little bit faster than version 2.0 but PCIe 2.0 × 16 have enough power and efficiency to handle the PCIe 3.0 × 16 graphics card. No gaming lag, no performance loss. …

Is PCIe 2.0 a bottleneck?

Splendid. no pcie 2.0 will not bottleneck and will likely not anytime soon. gpus dont even come close to the bandwidth limit.

Is PCIe x16 the fastest?

The PCIe x16 slot is the fastest in any generation as it has the most PCIe lanes available and this results in a higher data throughput (speed in layman’s terms). This slot is ideal for large and power hungry cards like a graphics card. However, not all x16 slots are created equally.

How do I check my NVMe PCIe version?

A gen 3 NVMe SSD, such as the Samung 970 Pro, works at half its speed!…There are four simple ways that you can use to check the PCI Express version of the slot:

  1. Use a Free Third Party Software like GPU-Z.
  2. Manually Check the Motherboard.
  3. Check the Specsheet Online.
  4. Use the Provided User Guide/Manual.

Can I use a PCIe x16 in a PCIe X8 slot?

Yes, a PCIe X8 card can most certainly fit in an x16 slot. However, the bandwidth of the card will only be limited to 8 PCIe lanes. In other words, the installed card will not utilize the entire X16 lanes the slot has to offer.


From what we showed in this guide, it’s easy to check the PCIe speed of your computer. The process just requires a few steps. Knowing the PCIe speed of your computer is vital to understanding the maximum speed that your PC can achieve.

Andy Avery

I really enjoy helping people with their tech problems to make life easier, ​and that’s what I’ve been doing professionally for the past decade.

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