Seagate Momentus 7200.4 (ST9500420AS) hard drive

Seagate's Momentus 7200.4 is a 7200rpm hard drive that will fit in a notebook

  • Review
  • Specs
  • Images
  • User Reviews
  • Buy Now
Seagate Momentus 7200.4 (ST9500420AS)
  • Seagate Momentus 7200.4 (ST9500420AS)
  • Seagate Momentus 7200.4 (ST9500420AS)
  • Seagate Momentus 7200.4 (ST9500420AS)
  • Expert Rating

    4.25 / 5

Pros

  • Very fast read/write speeds, relatively good price per gigabyte

Cons

  • Vibrates more than a 5400rpm laptop hard drive

Bottom Line

The Seagate Momentus 7200.4 (ST9500420AS) is a laptop hard drive that offers faster read/write speeds than many larger desktop hard drives. If you need a fast and cool hard drive for laptops, media centre PCs or network-attached storage (NAS) devices, this is worth a look.

Would you buy this?

The Seagate Momentus 7200.4 (ST9500420AS) is a 500GB 2.5in hard drive with a spin speed of 7200rpm and a 16MB cache. Despite being small enough to fit in a laptop drive bay it is faster than many 3.5in hard drives designed for desktop PCs.

The Seagate Momentus 7200.4 is faster than 5400rpm laptop drives we've tested, such as the Western Digital Scorpio Blue (WD5000BEVT) and the Seagate Momentus 5400.4 250GB (ST9250827AS). This was shown in our transfer tests.

We copied 19.4GB of files from our testbed PC, which uses a Western Digital Velociraptor (WD3000GLFS), and recorded a write speed of 77.2 megabytes per second and a read speed of 85.99MBps. Duplicating data on the Momentus hard drive (copying data from one folder on the drive to another), was achieved at a rate of 25.63MBps. This is an excellent result, especially given that many desktop hard drives such as the Hitachi Deskstar 7K1000.B (HDT721010SLA360) and the Seagate Barracuda 7200.11 1.5TB aren't as fast.

Out in the open, the Seagate Momentus 7200.4 ran at an average temperature of 30 degrees Celsius. This is nine degrees cooler than a typical 3.5in hard drive. Because it's as fast as a desktop drive and has such a large capacity, it's a good hard drive to use in a PC case in which space is at a premium (such as a media centre). The relatively low heat production means you can use a couple of these drives in a RAID array in a cramped case without worrying about them overheating.

As well as delivering faster performance, the higher spin speed results in a higher level of vibration. When we installed the Seagate Momentus 7200.4 (ST9500420AS) hard drive in a 15.4in laptop, its level of vibration was more noticeable through the palm rest than it was when we installed a 5400rpm Western Digital Scorpio (WD3200BEVT).

The Seagate Momentus 7200.4 (ST9500420AS) has a formatted capacity of 465GB and a cost per gigabyte of 47 cents. While this is expensive when compared to desktop hard drives such as the Hitachi Deskstar 7K1000.B (HDT721010SLA360), which has a cost per formatted gigabyte of 26.7 cents, it is competitive for a notebook drive. It is slightly cheaper than the 55.7 cents per formatted gigabyte of the Western Digital Scorpio Blue (WD5000BEVT).

The Seagate Momentus 7200.4 (ST9500420AS) will be useful if you're after a high-performance laptop hard drive for tasks like video editing or playing games. It's also worth a look if you're building a fast and cool media centre for your home entertainment system.

Struggling for Christmas presents this year? Check out our Christmas Gift Guide for some top tech suggestions and more.

Join the Good Gear Guide newsletter!

Error: Please check your email address.

Most Popular Reviews

Follow Us

Best Deals on GoodGearGuide

Shopping.com

Latest News Articles

Resources

GGG Evaluation Team

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell

LIFEBOOK UH574

The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi

STYLISTIC Q702

The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Simon Harriott

STYLISTIC Q702

My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?