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Seagate Cheetah 15K.5 ST3146855LW 147GB 15000 RPM 16MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
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Seagate Cheetah 15K.5 ST3146855LW 147GB 15000 RPM 16MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
  • Average Latency: 2ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3146855LW
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  • $459.95 
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900GB 15K RPM SAS 12Gbps 512n 2.5in Hot-plug Hard Drive, Cus Kit
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Seagate Exos 10E2400 1.2TB 10K RPM 512n SAS 12Gb/s 2.5-Inch Enterprise HDD (ST1200MM0039)
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  • $230.30 
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HP 461289-001 1TB 7200 RPM SAS 3Gb/s 3.5" Internal Hard Drive
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  • $40.00 
  • Free Shipping
WD AV-GP WD1600AVVS 160GB 8MB Cache SATA 3.0Gb/s 3.5" Internal AV Hard Drive
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WD AV-GP WD1600AVVS 160GB 8MB Cache SATA 3.0Gb/s 3.5" Internal AV Hard Drive
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: WD1600AVVS
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  • $69.95 
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Seagate Constellation ES ST1000NM0001 1TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Internal Enterprise Hard Drive Bare Drive
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0N660 8TB 7.2K SAS 3.5" 12Gb/s 512e HARD DRIVE REPLACEMENT KIT
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  • $500.00 
Seagate Cheetah 15K.5 ST373455LW 73.4GB 15000 RPM 16MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
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Seagate Cheetah 15K.5 ST373455LW 73.4GB 15000 RPM 16MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
  • Average Latency: 2ms
  • Parts: 2 yrs wty from vendor
  • Labor: 30 DAYS WARRANTY
  • Model #: ST373455LW
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  • $599.95 
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Seagate Cheetah 15K.5 ST3300655LW 300GB 15000 RPM 16MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
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Seagate Cheetah 15K.5 ST3300655LW 300GB 15000 RPM 16MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
  • Average Latency: 2ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3300655LW
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  • $599.95 
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400-AUSL GND9R 2.4TB 10K SAS 2.5" 12Gb/s hard drive replacement kit for blade servers
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400-AUSL GND9R 2.4TB 10K SAS 2.5" 12Gb/s hard drive replacement kit for blade servers
  • Parts: 3 Years
  • Labor: 3 Years
  • Model #: FS-D24121-13G-B-400-AUSL
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  • $550.00 
400-AVEZ - DELL 2.4TB 10K SAS 2.5" 12Gb/s HDD 14G KIT FOR PE R640 R740 R740XD
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  •  
  • $550.00 
K0N77 - DELL 2.4TB 10K SAS 2.5" 12Gb/s HDD 14G KIT FOR PE R640 R740 R740XD
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  •  
  • $550.00 
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400-AVCD - DELL 2.4TB 10K SAS 2.5" 12Gb/s HDD 14G KIT FOR PE R640 R740 R740XD
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  • $550.00 
GND9R - DELL 2.4TB 10K SAS 2.5" 12Gb/s HDD 14G KIT FOR PE R640 R740 R740XD
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  • $550.00 
EG1200JEMDA HPE 1.2TB 12G 10K SFF SAS SC Hard Drive
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Dell 400-AIXV - Dell 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell 400-AIXV - Dell 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
  • Average Latency: 12Gb/s
  • Model #: 400-AIXV
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WXPCX 1.2TB 10K SAS 2.5" 12Gb/s hard drive replacement kit
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WXPCX 1.2TB 10K SAS 2.5" 12Gb/s hard drive replacement kit
  • Parts: 3 Years
  • Model #: FS-D12121-13G-WXPCX
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  • $195.00 
IBM 90Y8572 2TB 7200 RPM 3.5" Internal Hard Drive
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IBM 90Y8572 2TB 7200 RPM 3.5" Internal Hard Drive
  • Average Latency: 6Gb/s
  • Model #: 90Y8572
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  • $299.99 
  • $12.99 Shipping
HGST Deskstar NAS 3.5" 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s High-Performance Hard Drive for Desktop NAS Systems Retail Packaging
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HGST Deskstar NAS 3.5" 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s High-Performance Hard Drive for Desktop NAS Systems Retail Packaging
  • Average Latency: 6Gb/s
  • Height (maximum): 26.10mm
  • Width (maximum): 101.00mm
  • Length (maximum): 146.00mm
  • Model #: 0S03664
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IBM 00FN460 - IBM 300GB 2.5" SAS 15K 6Gb/s Hard Drive
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Samsung MZ7KH960HAJR - Samsung 960GB 2.5" SATA  6Gb/s Solid State Drive
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  • $542.40 
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Seagate BarraCuda 7200.9 ST3160212A 160GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3160212A 160GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 11ms
  • Average Write Time: 12ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3160212A
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  • $69.95 
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Seagate DB35 Series 7200.3 ST3500830ACE 500GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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  • $177.11 
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Seagate Barracuda 7200.10 ST380815A 80GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate
Seagate Barracuda 7200.10 ST380815A 80GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST380815A
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  • $89.95 
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EG000600JWJNH HPE 600GB 10K 12G SFF SAS SC Hard Drive
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EG000600JWEBH HPE 600GB 10K 12G SFF SAS SC Hard Drive
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Seagate Cheetah X15 ST318452LC 18.4GB 15000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive Bare Drive
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Seagate
Seagate Cheetah X15 ST318452LC 18.4GB 15000 RPM 8MB Cache SCSI Ultra320 80pin 3.5" Hard Drive Bare Drive
  • Average Seek Time: 3.6ms
  • Average Latency: 2ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST318452LC
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  • $279.95 
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QR496A HP 900GB 10K SAS 6G 2 port 2.5" Hard Drive 727290-002 697389-001
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  • $28.00 
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WD Ultrastar DC HC520 12TB SATA 6Gb/s 3.5-Inch Data Center Hard Drives - HUH721212ALE600 (0F29590)
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Desktop internal hard drives store operating systems, system files, software and individual files. They can offer anywhere from 500GB of storage up to 8TB or more and come with a variety of interfaces. Although most internal drives are 3.5in., some devices use a smaller 2.5in. form factor. Smaller and larger physical sizes are rare but do exist. Also, consider the speed of the drive. Internal hard drives for desktop computers tend to run at 7,200 revolutions per minute (RPM) but faster read-write speeds minimize waiting time. Hard drives with speeds of up to 15,000 RPM are available. Finally, memory cache is the amount of memory that can be active at any given time. A larger cache is important if you work with multiple large files at once.

Improve Your Computer's Performance with a New Hard Drive

You might not be concerned about storage space when you buy a new PC, but the hard drive will fill will with files and software. A new desktop internal hard drive can replace an existing drive that has reached maximum capacity. Alternatively, if your motherboard has a spare bay, you can add a second or additional device to expand storage. An internal HDD for PCs is easy to install, has greater capacity and speed than an external device and comes with multiple storage options.

Store All Your Data with Large Capacity Drives

Every piece of software you install, every song you save, every video you download takes up storage space, which can slow down a computer. A 720p movie takes up approximately 8GB, while a 4k video can consume as much as 100GB of a desktop internal hard drive. Even the Windows 10 operating system requires 15GB. A 500GB hard drive can be useful for storing files while you're on the move before transferring them to a larger drive if you don't have a personal cloud device or portable hard drive. For everyday and ongoing storage, this size drive will quickly fill up. Desktop internal hard drives offer the storage of up to 16TB in some cases, providing plenty of space for software and files.

Ensure Compatibility by Choosing the Right Interface

The most commonly used standards for connecting a desktop internal hard drive to a motherboard are SATA and SAS. Determine the motherboard's interface and ensure that you match this when buying a new drive to ensure compatibility and to avoid having to use an adapter. Check the label off the drive you are replacing or look at the manufacturer guidelines for your motherboard.

Access Data Quicker with a Fast SATA Internal Hard Drive

The speed the disk platters spin determines how quickly information can be retrieved from the drive. It is common for external hard drives to have a speed of 5,000 RPM because this draws less power and makes minimal noise. Other hard drive designs have a speed of up to 15,000 RPM, depending on the model.

Bestselling Desktop Internal Hard Drives Reviews:

the Muttonmastwer
5/11/2026 11:18:09 AM
Hasn't broken yet

“ I have it attached via USB on my desktop and it has all my work on it, safe from Windoze crash damage or erasure on OS re-installs. ”

WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX