What is PCIe speed from Gen1 to Gen6
FULL DULEX
| SPEC | X1 | X2 | X4 | X8 | X16 |
| PCIe 1.x (2.5 GT/s) | 500 MB/s | 1 GB/s | 2GB/s | 4GB/s | 8GB/s |
| PCIe 2.x (5.0 GT/s) | 1GB/s | 2GB/s | 4GB/s | 8GB/s | 16GB/s |
| PCIe 3.x (8.0 GT/s) | 2GB/s | 4GB/s | 8GB/s | 16GB/s | 32GB/s |
| PCIe 4.x (16 GT/s) | 4GB/s | 8GB/s | 16GB/s | 32GB/s | 64GB/s |
| PCIe 5.x (32 GT/s) | 8GB/s | 16GB/s | 32GB/s | 64GB/s | 128GB/s |
| PCIe 6.x (64 GT/s) | 16GB/s | 32GB/s | 64GB/s | 128GB/s | 256GB/s |
HALF DUPLEX
| SPEC | X1 | X2 | X4 | X8 | X16 |
|---|---|---|---|---|---|
| PCIe 1.x (2.5 GT/s) | 250 MB/s | 500 MB/s | 1 GB/s | 2 GB/s | 4 GB/s |
| PCIe 2.x (5.0 GT/s) | 500 MB/s | 1 GB/s | 2 GB/s | 4 GB/s | 8 GB/s |
| PCIe 3.x (8.0 GT/s) | 984.6 MB/s | 1.97 GB/s | 3.94 GB/s | 7.88 GB/s | 15.75 GB/s |
| PCIe 4.x (16 GT/s) | 1.97 GB/s | 3.94 GB/s | 7.88 GB/s | 15.75 GB/s | 31.51 GB/s |
| PCIe 5.x (32 GT/s) | 3.94 GB/s | 7.88 GB/s | 15.75 GB/s | 31.51 GB/s | 63.02 GB/s |
| PCIe 6.x (64 GT/s) | 7.88 GB/s | 15.75 GB/s | 31.51 GB/s | 63.02 GB/s | 126.03 GB/s |
Full duplex and half duplex are terms used in telecommunications and networking to describe the directionality of data transmission between two devices. In full duplex communication, data can flow simultaneously in both directions, allowing for bi-directional communication at the same time. This means that devices can both send and receive data concurrently, similar to a two-way street where traffic can flow in both directions simultaneously. On the other hand, in half duplex communication, data can only flow in one direction at a time. Devices must take turns sending and receiving data, akin to a single-lane road where traffic can only move in one direction at any given moment, alternating between incoming and outgoing traffic. Full duplex communication typically offers higher throughput and faster data transfer rates compared to half duplex communication, as it enables simultaneous transmission and reception of data, facilitating more efficient communication between devices.
What is PCIe Gen 1 x1 speed?
500 MB/s
What is PCIe Gen 1 x2 speed?
1GB/s
What is PCIe Gen 1 x4 speed?
2GB/s
What is PCIe Gen 1 x8 speed?
4GB/s
What is PCIe Gen 1 x16 speed?
8GB/s
What is PCIe Gen 2 x1 speed?
1GB/s
What is PCIe Gen 2 x2 speed?
2GB/s
What is PCIe Gen 2 x4 speed?
4GB/s
What is PCIe Gen 2 x8 speed?
8GB/s
What is PCIe Gen 2 x16 speed?
16GB/s
What is PCIe Gen 3 x1 speed?
2GB/s
What is PCIe Gen 3 x2 speed?
4GB/s
What is PCIe Gen 3 x4 speed?
8GB/s
What is PCIe Gen 3 x8 speed?
16GB/s
What is PCIe Gen 3 x16 speed?
32GB/s
What is PCIe Gen 4 x1 speed?
4GB/s
What is PCIe Gen 4 x2 speed?
8GB/s
What is PCIe Gen 4 x4 speed?
16GB/s
What is PCIe Gen 4 x8 speed?
32GB/s
What is PCIe Gen 4 x16 speed?
64GB/s
What is PCIe Gen 5 x1 speed?
8GB/s
What is PCIe Gen 5 x2 speed?
16GB/s
What is PCIe Gen 5 x4 speed?
32GB/s
What is PCIe Gen 5 x8 speed?
64GB/s
What is PCIe Gen 5 x16 speed?
128GB/s
What is PCIe Gen 6 x1 speed?
16GB/s
What is PCIe Gen 6 x2 speed?
32GB/s
What is PCIe Gen 6 x4 speed?
64GB/s
What is PCIe Gen 6 x8 speed?
128GB/s
What is PCIe Gen 6 x16 speed?
256GB/s
| Where to Buy a Product | |||
 |
    
|
  
|
VISIT RETAILER ➤ |
 |
|
|
VISIT RETAILER ➤ |
 |
|
|
VISIT RETAILER ➤ |
 |
|
|
VISIT RETAILER ➤ |
We use affiliate links on the blog allowing NAScompares information and advice service to be free of charge to you. Anything you purchase on the day you click on our links will generate a small commission which is used to run the website. Here is a link for Amazon and B&H. You can also get me a ☕ Ko-fi or old school Paypal. Thanks! To find out more about how to support this advice service check HERE If you need to fix or configure a NAS, check Fiver Have you thought about helping others with your knowledge? Find Instructions Here
Minisforum MS-R1, N5 Pro NAS and G1 Pro Machine Updates @Computex
QNAP @Computex 2025 - TB5 NAS, USB4 to 25GbE, TS-462A, 45PB Scale Out, Hybrid Backup Center, Big HA
Asustor @ Computex 2025 - The Lockerstor R12 Pro Rackmount and TrueNAS
Synology @ Computex 2025 - DS225+ DS425+, PAS7700, More Drives, DVA7700 and More
Synology Drive Media Deep Dive - ARE THEY ACTUALLY ANY GOOD?
(EARLY) The Problem (and the solution) with Oculink eGPUs (GMKtec AD-GP1 Review)
Access content via Patreon or KO-FI
The table is slightly misleading, because everything is listed as FULL DUPLEX speed. You should note this in your article.
Ex: you are listing PCIe 1.x for single lane x1 at 5GT/sec. PCIe 1.x speed is actually 2.5 GT/sec write + 2.5 GT/sec read, for 5GT/sec combined total speed.
That said. if one puts a SATA PCIe 2.0 x1 adapter card or a USB 3.x PCIe 2.0 x1 card in one of these slots expecting near SATA III 600MB/sec speeds for reads and writes, you are not going to get it. You’ll be lucky if it is faster than a regular SATA hard disk. In fact, even with a PCIe 2.x USB 3.x card, regular SATA disks max out the bus.
Please beware that this is a COMBINED speed, do not expect full throughput for reads and writes, at even HALF of this combined speed, because of the communication overhead.
Thank, you. I have added another table.