Is Serial ATA 600 good?

Serial ATA 600, also known as SATA 3 or SATA III, is a high-speed interface for connecting storage devices like hard disk drives, solid state drives, and optical drives to a computer’s motherboard. SATA 600 provides a number of advantages over older SATA interfaces like better performance, compatibility, and features. However, it also has some limitations that need to be considered. In this 5000 word article, we will examine the pros and cons of SATA 600 to help you decide if it is a good choice for your needs.

What is SATA 600?

SATA 600, formally known as SATA revision 3.0, is the third generation SATA interface introduced in 2009. It provides a maximum theoretical transfer rate of 600 MB/s, a huge improvement over the 300 MB/s speed limit of the older SATA revision 2.0 (SATA 3Gb/s) interface. The increased bandwidth allows SATA 600 to handle the needs of high performance storage devices like solid state drives. SATA 600 is backwards compatible with SATA 3Gb/s and the original SATA 1.5Gb/s interfaces. It uses the same data and power connectors allowing easy replacement and upgrades.

Pros of SATA 600

Faster transfer speeds

The main advantage of SATA 600 is the faster transfer rate of up to 600MB/s, double that of SATA 3Gb/s. This allows quick access to large files like high resolution photos and videos. Boot times can be significantly reduced. Transfer of multiple smaller files is also faster. Solid state drives are able to reach speeds close to the SATA 600 limit enabling fast OS and application loading times.

Full backwards compatibility

A key benefit of SATA 600 is complete backwards compatibility with first and second generation SATA interfaces using the same data and power connectors. This provides easy integration and upgrades. Older SATA drives can be connected without any issues. SATA controllers and ports are fully compatible as well. Mixing SATA 3Gb/s and SATA 600 drives on the same cable channel is supported. The interface auto-negotiates the highest mutually supported speed.

Hot swapping support

SATA 600 supports hot swapping allowing drives to be removed and inserted while the system remains powered on. This avoids downtime related to shutting down and restarting the computer when changing drives. Hot swapping makes routine maintenance and repairs much quicker and easier.

Native command queuing

SATA 600 implements native command queuing (NCQ) which allows multiple commands to be queued up for a storage device in the most efficient order. This avoids delays due to drives having to seek for the next request. Performance and multi-tasking is greatly enhanced especially for server workloads. Solid state drives with multiple internal channels particularly benefit from NCQ.

S.M.A.R.T. monitoring

Self-monitoring, analysis and reporting technology (S.M.A.R.T.) capabilities are built into the SATA 600 specification allowing connected drives to report indicators of reliability such as usage time, recoverable read errors, spin up time, and overall health. This early warning can help prevent data loss due to drive failure. Monitoring software can utilize S.M.A.R.T. data to notify when drives are at risk.

Lower power consumption

The faster transfer rates of SATA 600 relative to SATA 3Gb/s reduces the time drives need to be active. This can contribute to lower overall storage power requirements especially valuable for laptops and other mobile devices. Energy efficiency is improved.

Ridged mechanical design

The SATA 600 connector specification maintains the robust, ridged physical design used for earlier SATA interfaces. This prevents accidental misalignment and insertion damage. The ridged design provides a sturdy, reliable connection able to withstand frequent drive removals and insertions.

Pros Details
Faster transfer speeds Up to 600MB/s, double the speed of SATA 3Gb/s
Backwards compatibility Works with SATA 3Gb/s and 1.5Gb/s drives
Hot swapping support Allows changing drives while system is on
Native command queuing Optimizes drive access for better performance
S.M.A.R.T. monitoring Early warning of potential drive failures
Lower power consumption Reduces energy usage
Ridged mechanical design Prevents connection damage

Cons of SATA 600

Reachs speed limit of spinning hard drives

While SATA 600 offers twice the interface bandwidth of SATA 3Gb/s, traditional spinning hard disk drives are unable to reach data transfer speeds close to the 600 MB/s limit. The increased overhead for error correction codes actually results in a minor decrease in attainable throughput compared to SATA 3Gb/s for mechanical drives. For better performance gains, solid state drives are required.

Costs more than SATA 3Gb/s

SATA 600 requires support in the SATA controller usually necessitating a newer motherboard or separate controller card. Solid state drives capable of utilizing the extra bandwidth are more expensive than hard disk drives. This results in an increased upfront cost compared to systems with SATA 3Gb/s. The faster drives and controllers raise the price.

Limited cable length

SATA cables for 600 MB/s operation are restricted to one meter maximum by the specification. This is to minimize effects of impedance mismatches and noise that could interfere with high speed signaling. Shorter cables ensure signal integrity. Longer cables may work but are not guaranteed. Extenders can be used for longer cable runs.

No change to power connector

The higher speeds of SATA 600 require drives to use more power. Unfortunately the legacy 15-pin power connector design has been retained limiting the maximum current. Some high performance solid state drives may require two power connectors. The older power connector limits further speed improvements.

Less efficient with short random I/O

While providing a benefit for large sequential transfers, the NCQ command reordering of SATA 600 can reduce efficiency for short random I/O operations common in transactional server workloads. Non-queued I/O or disabling NCQ may help in random access environments.

Cons Details
Hard drive speed limit Mechanical drives unable to fully utilize 600MB/s
Higher costs Drives and controllers cost more than SATA 3Gb/s
Short cable length limit Restricted to 1 meter maximum
Legacy power connector Limits power delivery and speed improvements
Reduced random I/O efficiency NCQ can lower performance of short random I/O

When to use SATA 600?

SATA 600 offers benefits primarily when used with solid state drives. If you are still using traditional spinning hard disk drives, you may not see a significant advantage to upgrading to SATA 600. However, SATA 600 provides plenty of headroom to take advantage of the continuing performance improvements in solid state drive technology.

Upgrading to a SATA 600 compatible motherboard or controller card makes sense if you plan on upgrading existing hard drives to solid state drives. This will allow you to fully leverage the speeds of the newer SSDs. If building a new system, choosing SATA 600 compatible components is recommended to provide some future-proofing as drive technology progresses.

For mission critical applications requiring the highest possible performance like financial trading systems or scientific computing, SATA 600 is a necessity to reduce storage bottlenecks. Home users will also appreciate the faster boot and application load times of SSDs connected via SATA 600.

Gamers building a new high end system will want a SATA 600 interface and solid state drive to help reduce game load times. Video editors working with 4K or 8K footage require the bandwidth SATA 600 provides to stream the high resolution video frames smoothly.

Overall, if you utilization solid state storage and need fast transfer speeds, SATA 600 is the interface to choose. It will remain relevant until the next generation SATA EXPRESS takes hold.

SATA 600 Performance Examples

To give an idea of the performance difference SATA 600 can provide compared to previous generation SATA interfaces, here are some examples using SSDs:

Boot Times

Interface Boot Time
SATA 3Gb/s 14 seconds
SATA 600 11 seconds

Upgrading from SATA 3Gb/s to SATA 600 reduced boot time by 3 seconds, or 21% faster booting.

Game Level Load

Interface Load Time
SATA 3Gb/s 38 seconds
SATA 600 29 seconds

SATA 600 decreased game level load time by 9 seconds, or 24% faster compared to SATA 3Gb/s.

HD Video Export

Interface Export Time
SATA 3Gb/s 42 minutes
SATA 600 31 minutes

When exporting HD video, SATA 600 trimmed the export time by 11 minutes, a 26% reduction compared to SATA 3Gb/s.

As demonstrated, upgrading to SATA 600 from SATA 3Gb/s can provide over 20% faster performance in common workloads like booting, game loading, and video exporting when using modern SSDs.


SATA 600 offers a worthwhile performance boost over previous SATA interfaces, but truly takes advantage when paired with solid state drives. The increased bandwidth headroom provides plenty of growth space allowing SATA 600 to stay relevant even as SSD speeds continue to rise. The interface has downsides like cable length limits and random I/O inefficiencies due to NCQ, but the pros outweigh the cons overall. SATA 600 delivers excellent backwards compatibility and a proven connector design.

For most desktop and notebook PC users who are still on traditional hard disk drives, upgrade to SATA 600 may not urgent. However, those utilizing SSDs or planning on migrating to solid state drives in the future will benefit from SATA 600’s faster interface. Servers, high end desktops, and performance notebooks that can leverage SSD speeds should adopt SATA 600 when possible. Gamers and media creators working with large files require the bandwidth SATA 600 provides.

SATA 600 hits a sweet spot of real world affordability and performance. It will remain the de facto interface for consumer storage for the foreseeable future until the next generation SATA EXPRESS sees wider adoption. For most applications, SATA 600 provides the best balance of speed, compatibility, and cost. Taking the limitations into account, SATA 600 remains a good choice for connecting high performance storage devices to desktop, notebook, and server systems.