Differences between PCIe and SATA

Laptops have extensively used PCIe and SATA storage interfaces.

We’ve examined each of these storage interfaces separately, but now it’s time to compare them to determine the differences.

But keep in mind that both of these interfaces are essential, so there is no winner.

Differences between PCIe and SATA:

1. Utility:

The PCI interface was designed from the beginning to change the requirements of AGP and other interfaces for connecting video cards, network adapters, and other peripherals.

Due to the invention of NVMe slots, their application in SSDs is a relatively recent phenomenon.

SATA was designed primarily to connect motherboards to storage drives and to transfer data between them.

Due to limitations, SATA cannot be used to install GPUs or other PCIe-compatible components.

2. Form of Connection:

A PCIe card is an expansion card that is integrated into the motherboard that provides access to the components.

The SATA interface is comparable to a 2.5″ hard disk.

There are two ports: one on the storage drive and the other on the motherboard.

3. No. Of Wires:

Every lane of a PCIe connection has two pairs of wires, one for data input and the other for data output.

As a result, an x1 connection has four wires, and x4 connection has sixteen, and so on.

Each SATA cable has a total of seven wires, four are present in a pair of two for genuine data transmission.

The remaining three wires are ground wires, which safely eliminate excess charge from your system if an issue occurs.

4. Bandwidth:

The most common PCIe formats are x1, x4, x8, and x16 lanes.

The total bandwidth is significant, approximately 32 GB / s, and each PCI 3.0 lane can carry data at a rate of 8 GT / s.

SATA drive bandwidth is 6Gb / s, thus it’s slow.

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5. Speed:

Indeed, the oldest version of the PCIe interface is PCIe 1.0 which offered single-lane rates of 250 MB/s with a total of 6 Gb/s on the x16 lanes.

On an x1 lane, the PCI 3.0 has a real-time maximum speed of 985 MB/s that is doubled when more lanes are used.

There are still faster PCIe versions available.

When compared to PCIe, the fastest performance a SATA can achieve is around 600 MB/s, and that is the most modern SATA III interface.

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6. Price:

SSDs are usually more expensive than hard discs.

Due to the general faster reading and writing speeds, NvMe SSDs are more expensive.

SATA III SSDs are less expensive with one costing around 5k, while PCIe SSD costs significantly more than a SATA III SSD.

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Which is Better: PCIe vs SATA?

SATA is a low-cost mode of data transfer for day-to-day computing, while PCIe is required for gaming, dealing with servers, and other jobs that require a lot of loads.

As a result, it is entirely dependent on your requirements.

The SATA III interface is designed for low-cost clients, whereas the PCIe interface is designed for customers who require high performance at a higher cost.

For storage needs, casual and residential users should choose SATA.

NVMe or PCIe SSD is recommended for those who need high efficiency, fast file transfer, and other benefits.

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Frequently Asked Questions:
Which is better SSD SATA or PCIe?

SSDs based on PCIe outperform SATA counterparts.

What is PCIe?

PCI Express is a serial bus that works like a network than a bus.

What is SATA?

SATA is a data transfer link interface between a computer’s central circuit board and storage devices.


You will need both storage because SATA usage is limited but cheap and you cannot add a GPU to your PC unless you have an additional PCIe slot.

As a result, each has a different significance.

Section Under: FAQ

Hi, I am Meena Patil, the founder of best-laptop.in/, I did my B.E. Computer. This blog provides honest information related to several laptops, laptop equipment, laptop reviews, buyer's guide and much more.

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