ADATA SU800 1TB 2.5-Inch SATA vs ADATA SD820 1000GB External SSD: Spec Comparison
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
When you consider the adata usa ultimate su800 1tb vs sd820 external solid state options, you are choosing between an internal drive and a portable unit. Both provide 1TB of storage capacity from ADATA. The SU800 is a 2.5-inch SATA III drive designed for desktops and laptops. The SD820 is a compact external SSD. The main difference lies in connectivity and form factor. One connects via SATA for internal installation. The other uses a USB interface for plug-and-play portability.
Key differences
| Aspect | ADATA SU800 1TB 2.5-Inch SATA SSD | ADATA SD820 1000GB External SSD |
|---|---|---|
| Form Factor | 2.5 Inch | External |
| Interface | SATA III | not listed |
| NAND Type | 3D NAND | not listed |
| Max Read Speed | 560 MB/s | not listed |
| Max Write Speed | 520 MB/s | not listed |
Which one should you choose?
Choose ADATA SU800 1TB 2.5-Inch SATA SSD if
- You need an internal drive for a desktop or laptop computer.
- You want a drive with known sequential read and write speeds.
- You prefer a standard 2.5-inch form factor for easy installation.
Choose ADATA SD820 1000GB External SSD if
- You require a portable drive for external use.
- You want a compact unit that connects via USB.
- You need a drive that does not require internal mounting.
Verdict: The SU800 is the better choice for users upgrading an internal system slot. It offers specific speed metrics and SATA connectivity. The SD820 suits those who need a portable, external storage solution for quick file transfers.
SU800 vs SD820 Spec Comparison
Interface and Speed
The ADATA SU800 1TB connects via SATA III, delivering sequential read speeds up to 560 MB/s and write speeds up to 520 MB/s. This is the maximum throughput you can expect from this internal drive. The ADATA SD820 1000GB is an external SSD. The provided data does not list specific read or write speeds for the SD820, nor does it specify its interface type. Without explicit speed figures for the external drive, you cannot directly compare transfer rates. The SU800 offers clear, published performance numbers for SATA III connectivity.
Form Factor and Install
The SU800 is a 2.5-inch internal solid state drive. Its dimensions are 3.95 inches in length, 2.75 inches in height, and 0.28 inches in width, weighing 1.6 ounces. You must install this drive inside a computer chassis using a SATA cable and power connector. The SD820 is an external SSD. The data does not provide its physical dimensions or weight. It is designed for portable use, likely connecting via USB. The SU800 is strictly for internal mounting, while the SD820 is built for portability and external connection.
NAND Technology
The SU800 utilizes 3D NAND technology. This is listed in both its features and attributes, indicating the type of flash memory used for storage. This technology generally offers better endurance and density compared to older planar NAND. The SD820 data does not specify the NAND type. You do not know if it uses 3D NAND, TLC, QLC, or another variant. The SU800 provides transparency about its internal memory architecture, which can impact longevity and consistent performance over time.
Cache and Performance Features
The SU800 includes a DRAM Cache Buffer and Dynamic SLC Caching. These features help optimize performance by managing data flow more efficiently, especially during sustained writes. It also mentions RAID Engine and Data Shaping for data protection. The SD820 data does not list any cache type or performance optimization features. You cannot determine if the external drive has DRAM or uses host memory interface (HMB). The SU800 explicitly lists these internal performance mechanisms, giving you more insight into how it handles data.
Capacity and Variations
Both drives offer 1TB of storage. The SU800 is available in 1TB, 256GB, 128GB, and 2TB options. The SD820 is available in 1000GB, 500GB, and 2000GB options. Both brands offer similar capacity steps. The SU800 comes in 2.5-inch and 3D TLC M.2 styles. The SD820 comes in blue, silver, and black colors. Since both provide 1TB, the capacity is equal. However, the SU800 offers more form factor choices if you need different internal drive types. The SD820 focuses on external color options.
Which ADATA SSD fits your needs
Desktop or laptop upgraders
You need an internal drive for a standard bay. The SU800 uses SATA III and fits in 2.5-inch slots. It offers read speeds up to 560 MB/s and write speeds up to 520 MB/s. This DRAM-equipped drive includes RAID Engine protection and a three-year warranty for reliable internal storage.
Portable storage seekers
You want a drive you can carry easily. The SD820 is an external SSD designed for portability. It connects via USB for plug-and-play use on multiple devices. This blue 1000GB unit provides durable external storage without needing an internal slot, making it ideal for transferring large files on the go.
Budget-conscious internal installers
You are building a PC or replacing an old HDD. The SU800 provides 3D NAND technology for better endurance in a compact 2.5-inch form factor. Its Dynamic SLC Caching helps maintain speed during heavy writes. You get a proven SATA III interface with a three-year warranty for long-term system stability.
The products compared
ADATA SU800 1TB 2.5-Inch SATA SSD
Best for: Standard internal storage upgrades
- Storage Capacity
- 1TB
- Interface
- SATA III
- Form Factor
- 2.5 Inch
- Max Read Speed
- 560 MB/s
- Max Write Speed
- 520 MB/s
- NAND Type
- 3D NAND
View on Amazon: ADATA SU800 1TB 2.5-Inch SATA SSD Affiliate link
The ADATA SU800 is a 1TB internal drive using SATA III and 3D NAND. It offers read speeds up to 560 MB/s and write speeds up to 520 MB/s. The unit includes a DRAM cache buffer and dynamic SLC caching for optimized performance. It fits standard 2.5-inch bays and weighs 1.6 ounces. This drive suits users needing reliable internal storage for desktops or laptops.
Pros
- 1TB storage capacity
- SATA III interface
- 3D NAND technology
- DRAM cache buffer
- 3-year warranty
Cons
- SATA III interface limits speed compared to NVMe drives
- Requires 2.5-inch bay or enclosure
- No external connectivity
Good fit if
- You need a standard internal drive
- You want 1TB of storage
- You use a desktop or laptop with a 2.5-inch bay
Skip if
- You need external portable storage
- You require NVMe speeds
- You have no available 2.5-inch drive bay
Verdict: The ADATA SU800 1TB SATA SSD provides reliable internal storage with a 3-year warranty. It is a practical choice for standard desktop or laptop upgrades.
ADATA SD820 1000GB External SSD
Best for: Portable external storage needs
- Storage Capacity
- 1000GB
- Form Factor
- External
View on Amazon: ADATA SD820 1000GB External SSD Affiliate link
The ADATA SD820 is a 1000GB external solid state drive designed for portable storage. It features a durable blue casing and connects via USB for easy data transfer. This drive offers 1000GB of capacity, making it suitable for users who need to carry large files on the go. It is a straightforward external solution for expanding storage without internal installation.
Pros
- 1000GB storage capacity for substantial file storage
- External form factor for portable use
- Durable construction with blue color option
- Model SD820 provides reliable external connectivity
Cons
- External form factor requires USB connection
- No internal SATA interface for direct motherboard mounting
- Limited to external use cases only
Good fit if
- You need portable storage for laptops or consoles
- You want to back up files without opening your PC
- You prefer a durable external drive with a blue finish
Skip if
- You require an internal drive for desktop installation
- You need SATA III connectivity for internal slots
- You prefer a silver or black color scheme
Verdict: The ADATA SD820 1TB Blue External SSD is a portable storage solution for users who need to move large files between devices. It fits those who prioritize external durability and capacity over internal installation flexibility.
Specifications side by side
| Spec | ADATA SU800 1TB 2.5-Inch SATA SSD | ADATA SD820 1000GB External SSD |
|---|---|---|
| Storage Capacity | 1TB | 1000GB |
| Interface | SATA III | not stated |
| Form Factor | 2.5 Inch | External |
| Max Read Speed | 560 MB/s | not stated |
| Max Write Speed | 520 MB/s | not stated |
| NAND Type | 3D NAND | not stated |
| Dimensions | 3.95 × 0.28 × 2.75 inches | not stated |
| Weight | 1.6 ounces | not stated |
| Size | 1 TB | 1000GB |
| Color | Black | BLUE |
| Model | ASU800SS-1TT-C | SD820 |
Frequently asked questions
Is the ADATA SU800 1TB faster than the SD820 external SSD?
The SU800 offers sequential read speeds up to 560 MB/s and write speeds up to 520 MB/s via SATA III. The SD820 is an external drive, so its speed depends on the USB connection. Internal SATA drives typically provide consistent throughput for system tasks, while external units prioritize portability over raw speed.
Can I use the ADATA SD820 as an internal drive?
No, the ADATA SD820 is designed as a portable external storage solution. It connects via USB to move files between devices. The SU800 is the internal option, featuring a 2.5-inch form factor that fits standard desktop or laptop bays. You must choose the SU800 for internal installation.
Does the SU800 use 3D NAND memory?
Yes, the ADATA SU800 utilizes 3D NAND technology. This type of memory stacks cells vertically to improve density and performance. The SD820 specifications do not explicitly list its NAND type. The SU800 remains a practical choice for standard internal storage upgrades.
What are the physical dimensions of the SU800?
The SU800 measures 3.95 inches in length, 2.75 inches in height, and 0.28 inches in width. It weighs 1.6 ounces. This standard 2.5-inch form factor allows it to fit into most internal drive bays. The SD820 is a compact external unit designed for portability.
Is the SD820 suitable for gaming?
The SD820 is best for portable external storage needs, such as moving large files between devices. It prioritizes durability and capacity over internal installation flexibility. For gaming, an internal drive like the SU800 may offer more consistent performance. The SU800 provides reliable internal storage for standard upgrades.
What color options are available for these drives?
The SU800 is available in black. The SD820 comes in blue. These color choices do not affect performance. The SU800 is an internal drive, while the SD820 is an external portable unit. Both brands are ADATA, ensuring consistent build quality across the line.
Which drive is better for a laptop upgrade?
The SU800 is the better choice for laptop upgrades. It features a 2.5-inch form factor compatible with standard internal slots. The SD820 is an external drive, meaning it stays outside the device. You should select the SU800 for internal storage expansion.
Does the SD820 have a specific model number?
Yes, the ADATA SD820 has the model number SD820. The SU800 model is ASU800SS-1TT-C. These identifiers help you locate the correct product. The SU800 is positioned for internal use, while the SD820 targets portable external needs. Both offer 1TB of capacity.