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Seagate X16 vs X18 (2023): What’s The Difference?

If you’re in the market for a high-performance hard drive, you might be considering the Seagate Exos X16 and X18. Both are top-notch enterprise-level drives, and aside from their capacities, they do have some differences that might make one better suited for your needs. The X16, for instance, has a lower power consumption and a more budget-friendly price, while the X18 has a larger maximum capacity and better performance, but at a price premium. We compare them to help you decide which is the right hard drive for you.

Seagate X16 vs X18 Comparison Chart

ModelSeagate Exos X16 Seagate Exos X18
PriceCheck PriceCheck Price
Capacity14TB, 16TB10TB, 12TB, 14TB, 16TB, 18TB
Spindle Speed7200 RPM7200 RPM
Sustained Transfer Rate261/249270/258
Write Speed440550
Power Consumption5W4.9W – 5.6W
Dimensions1.03 x 4.01 x 5.78 inches1.03 x 4.01 x 5.78 inches


As their names would suggest, the Seagate Exos X18 has a higher maximum capacity than the X16.

seagate x16 vs x18 specs
The Seagate Exos X16 (left) and X18 (right) have the same physical dimensions, but the former is a tiny bit heavier.

There are key differences between the Seagate Exos X16 and X18 that make them better suited for different types of applications. One of the main differences is speed. The Exos X16 has a maximum sustained transfer rate of up to 260 MB/s, while the X18 has a maximum sustained transfer rate of up to 270 MB/s. This makes the X18 a better choice for applications that require quick and efficient data transfer speeds.

Another key difference is storage capacity. The Exos X18 has a larger maximum storage capacity than the X16. For this reason, the X18 is a better choice for large-scale data storage needs, such as data centers or cloud storage systems. However, the X16 still offers ample storage capacity for many applications, and its cheaper price tag may make it a better choice for some users.

The Exos X18 features a unique load/unload technology that helps to reduce wear and tear on the drive, further increasing its durability and longevity. The X16 does not have this technology, but it still features a robust design with a MTBF (mean time between failures) of 2.5 million hours. Both drives also feature advanced security features, including support for Self-Encrypting Drives (SEDs) and TCG Opal 2.0 encryption, to keep your data safe and secure.


The Seagate Exos X18, apart from having a higher capacity, also has a couple of features that you can’t get with the X16.

seagate x16 vs x18 features
Both hard drives can run 24/7 and there are power options to control their power consumption.

As mentioned above, one of the differences between the two drives is with their load/unload technology. The Seagate Exos X18 has the advantage here as it features a more advanced load/unload technology that can reduce wear and tear during regular use, thus, it can last longer.

Another difference between the two drives is their compatibility with data management technologies. Both drives are designed to work with various software tools and systems, but the X18 may offer additional support for some specific tools and systems. It’s important to check the compatibility of these drives with your existing storage infrastructure before making a decision.

Other features worth noting with these drives are their PowerChoice and PowerBalance technologies. The PowerChoice feature allows the drive to save power during periods of inactivity, allowing you to save on electricity and prolong the life of the drives. PowerBalance, on the other hand, allows the drives to seek balance between power consumption and performance during random read and write operations.


The Seagate Exos X18 offers faster read and write speeds than the Exos X16.

seagate x16 vs x18 performance
You’ll get excellent performance with both the Seagate Exos X16 and X18, along with a 5-year warranty.

Both drives are designed to operate in a 24/7 environment and feature low power consumption and low vibration levels, making them suitable for use in data centers and other high-density storage applications. That said, the Seagate Exos X16 does have a lower power consumption than the X18.

Aside from low power consumption, they are also optimized for fast seek times and reliable performance. If speed is a critical factor in your storage needs, the Exos X18 may be the better choice due to its faster read and write speeds. Additionally, the faster read and write speeds of the X18 can result in improved system performance, allowing you to access and transfer your data more quickly and efficiently.

It’s also worth mentioning that the specific read and write speeds of these drives will depend on the interface they are connected to, as well as the size and type of data being transferred. For example, if you’re working with large files, the X18 may provide faster transfer speeds than the X16, but this will also depend on the specific configuration of your storage environment. Ultimately, both the Seagate Exos X16 and X18 offer reliable performance, but the Exos X18 may be the better choice if speed is a top priority.


The Seagate Exos X16 is excellent if cost is a major factor, but if you want faster performance, higher capacity and improved durability, the Seagate Exos X18 is worth it.

Seagate Exos X16

Seagate Exos X18

It’s important to consider your specific needs and requirements when choosing between the Seagate Exos X16 and X18. Features-wise, the two are similar, but if speed, durability, higher capacity and better performance are top priorities, the Seagate Exos X18 is definitely the better option. However, if cost is a factor, the X16 is the obvious choice. You should also consider the specific configuration of your storage environment when picking between the two.


๐Ÿ“Œ What is the difference between Seagate Exos X16 and X18?

The Seagate Exos X18 offers faster read and write speeds, improved durability, and higher capacities compared to the Seagate Exos X16.

๐Ÿ“Œ How fast is Exos X18?

Seagate Exos X18 hard drives are capable of transfer speeds up to 270MBps.

๐Ÿ“Œ Is Seagate Exos 18TB CMR or SMR?

According to Seagate, their Exos drives are CMR.

๐Ÿ“Œ Are Seagate Exos drives noisy?

Seagate Exos drives are designed to be quiet, but the specific level of noise can vary depending on the model and the specific configuration of the drive.

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Carlo Salvador

Senior Editor at Compare Before Buying. Writer and researcher passionate about fitness, gaming and music.