Quantum FB640AT 640MB ATA/IDE front view Quantum FB640AT 640MB ATA/IDE front view
Quantum FB640AT 640MB ATA/IDE front view Quantum FB640AT 640MB ATA/IDE front view
Quantum FB640AT top view Quantum FB640AT top view
Quantum FB640AT angled view Quantum FB640AT angled view
Quantum FB640AT label view Quantum FB640AT label view
Quantum FB640AT 640MB ATA/IDE front view
Quantum FB640AT 640MB ATA/IDE front view
Quantum FB640AT top view
Quantum FB640AT angled view
Quantum FB640AT label view

Quantum

Quantum FB640AT – 640MB | ATA-33 IDE | 5400RPM | 3.5" | Legacy HDD

$149.95

Brand New, Factory Sealed | In Stock | Bulk Orders Available

The FB640AT is a 640MB ATA/IDE hard drive featuring 5400RPM spindle speed, 128KB cache, and 12ms average seek time in a 3.5" form factor. Built for mid-1990s desktop and workstation systems, it is ideal for legacy computing restorations, vintage system rebuilds, and retro hardware projects. Compatible with 486DX, early Pentium systems, and any motherboard with ATA/IDE controllers or compatible adapter cards. The drive features Quantum's AIRLOCK actuator parking system for data protection and reliable operation in continuous duty applications.

All products from Anand International ship brand new and factory sealed. Volume and B2B pricing available for qualified buyers.
Specifications
  • Manufacturer: Quantum
  • Model: FB640AT
  • Capacity: 640MB
  • Interface: ATA/IDE (40-pin)
  • Spindle Speed: 5400RPM
  • Cache: 128KB
  • Form Factor: 3.5"
  • Seek Time: 12ms average
  • Latency: 5.6ms average
  • MTBF: 100,000 hours
  • Drive Type: Internal Desktop HDD
  • Warranty: 90 days
  • Shipping: Free domestic US shipping
  • Condition: Brand New, Factory Sealed
Product Features
  • 640MB formatted capacity
  • ATA/IDE 40-pin interface
  • 5400RPM spindle speed
  • 128KB cache buffer
  • 3.5" low profile form factor
  • AIRLOCK actuator parking
  • Master/Slave jumper configuration
  • IBM PC AT compatible
  • Direct replacement for legacy systems requiring IDE/ATA connectivity
  • 90-day Anand International warranty on all legacy stock
  • Free domestic US shipping included
  • Volume and B2B pricing available for qualified buyers
Compatibility

Compatible with 486DX, Pentium, and other systems supporting ATA/IDE interfaces. Works with motherboard IDE connectors or third-party IDE adapter cards. Not compatible with SCSI-only systems or modern SATA controllers without IDE adapters.
Shipping & Returns
  • Free Shipping: We currently offer free Economy Shipping within the continental U.S. with no minimum order required. Expedited shipping is available at standard carrier rates.
  • Same-Day Shipping: Order placed before 2PM PST will ship the same day. Orders received after this time will ship the following business day.
  • Hassle-Free Returns: If you're not completely satisfied with your purchase, simply return it within 10 days for a hassle-free refund or exchange.

640MB ATA/IDE 5400RPM 128KB Cache Factory Sealed

Why the FB640AT is the right Legacy HDD

The Quantum Fireball FB640AT represents the pinnacle of mid-1990s desktop storage technology. With 640MB capacity and reliable ATA/IDE interface, it delivers optimal performance for period-appropriate systems. The 5400RPM spindle speed and 128KB cache provide responsive data access while maintaining quiet operation ideal for desktop environments. Still available brand new and factory sealed from Anand International — one of the few remaining sources for legacy IDE/ATA storage. Ships with 90-day warranty and free domestic shipping.

Authentic Mid-90s Storage Capacity

640MB provides ample storage for DOS, early Windows 95 systems, and legacy applications requiring period-correct capacity specifications.

Universal ATA/IDE Compatibility

Standard 40-pin IDE interface ensures broad compatibility with 486, Pentium, and other systems from the ATA/IDE era.

Reliable 5400RPM Performance

5400RPM spindle speed delivers optimal balance of performance and reliability for desktop computing applications.

AIRLOCK Actuator Protection

Quantum's patented AIRLOCK system automatically parks heads in the landing zone when powered down, protecting against shipping damage.

New Old Stock with 90-Day Warranty

Available as brand new, factory sealed old stock units from Anand International with a 90-day warranty. Ideal for legacy system maintenance, vintage computing restoration, and hard-to-find replacement needs.

Frequently Asked Questions

Frequently asked questions for IDE, including information on usage, configuration, and compatibility.

1. What is an IDE hard drive?

An IDE (Integrated Drive Electronics) hard drive is a legacy type of storage device that connects to a computer using a 40-pin ribbon cable and Molex power connector. It was widely used before SATA drives became standard.
2. Can IDE hard drives be used in modern computers?

Most modern PCs do not have IDE ports. However, you can still use an IDE hard drive with a compatible IDE controller card or an IDE-to-SATA/USB adapter.
3. What devices are IDE hard drives compatible with?

IDE hard drives are commonly used in older desktops, servers, DVR systems, legacy industrial equipment, and other electronics that require ATA/100 or ATA/133 interfaces.
4. Are IDE and PATA the same thing?

Yes. IDE is also known as PATA (Parallel ATA). Both terms refer to the same interface standard, which uses wide ribbon cables to connect drives.
5. How do I know if my system supports an IDE hard drive?

Check if your motherboard has a 40-pin IDE connector. If not, you can use an adapter or external enclosure that converts IDE to SATA or USB.
6. What is the maximum capacity of an IDE hard drive?

Most IDE hard drives range from a few hundred megabytes to 500GB, though practical support depends on your system’s BIOS limitations.
7. Can IDE hard drives be used for external storage?

Yes. By using an IDE-to-USB adapter or external IDE enclosure, you can repurpose an IDE hard drive as an external storage device.