SAMA GT750 750W Gold ATX vs SAMA G650 ATX 3.1 650W: Spec Comparison
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This comparison of the sama gt750 750w gold atx vs g650 atx 3 1 650w focuses on two fully modular ATX 3.1 power supplies from SAMA. Both units offer 80 PLUS Gold and Cybenetics Gold efficiency ratings, Japanese capacitors, and native 12V-2x6 connectors for modern GPUs. They share similar build heights and weights. The main difference lies in their power output and fan size. You need to decide between higher wattage or a larger, potentially quieter fan based on your specific build requirements.
Key differences
| Aspect | SAMA GT750 750W Gold ATX 3.1 | SAMA G650 ATX 3.1 650W Gold PSU |
|---|---|---|
| Wattage | 750W | 650W |
| Fan Size | 120mm | 140mm |
| Length | 5.5 inches | 5.9 inches |
| Color | White | Black |
Which one should you choose?
Choose SAMA GT750 750W Gold ATX 3.1 if
- You need higher wattage for a more powerful GPU or future upgrades
- You are building in a smaller case where a shorter PSU length is required
- You prefer a white color scheme for your build
Choose SAMA G650 ATX 3.1 650W Gold PSU if
- You prioritize a larger fan for potentially quieter operation at low loads
- You need a standard black power supply to match dark components
- You have sufficient case space for a longer PSU
Verdict: The SAMA GT750 offers more power and a shorter form factor, making it better for tight cases or high-end builds. The SAMA G650 features a larger fan, which may provide better acoustic performance in spacious cases. Choose the GT750 for capacity and fit, or the G650 for size and noise characteristics.
SAMA GT750 vs G650 Specs
Wattage output
The SAMA GT750 delivers 750 watts of continuous power, while the SAMA G650 provides 650 watts. This 100-watt difference matters if you plan to install a high-end graphics card or run multiple high-drain components. The GT750 offers more headroom for future upgrades or overclocking. The G650 is sufficient for standard gaming builds or mid-range systems. You should choose the GT750 if your total system load approaches 700 watts. The G650 is the better fit if your components stay under 600 watts. Both units maintain stable output within their rated limits.
Fan size
The SAMA GT750 uses a 120mm fan for cooling, whereas the SAMA G650 features a larger 140mm fan. Larger fans generally move more air at lower speeds, which can reduce noise levels. The 140mm fan in the G650 may offer quieter operation during low to medium loads. The 120mm fan in the GT750 is still effective but may spin faster to dissipate heat. Both fans use Fluid Dynamic Bearings for longevity. You might prefer the G650 if silence is your top priority. The GT750 remains a solid choice if noise is less critical than raw output capacity.
Physical dimensions
Both power supplies share the same width and height of 5.9 by 3.3 inches, fitting standard ATX cases. The SAMA GT750 is 5.5 inches long, while the SAMA G650 is slightly longer at 5.9 inches. The GT750 has a more compact depth, which helps in smaller cases with limited space. The G650’s extra length may not fit in very tight chassis. Both units weigh 3.53 pounds, so they are identical in mass. You should check your case’s maximum PSU length before buying. The GT750 offers a slight advantage for compact builds due to its shorter profile.
Efficiency rating
Both the SAMA GT750 and the SAMA G650 hold 80 PLUS Gold and Cybenetics Gold certifications. This means they both convert at least 90% of AC power to DC power at typical loads. You will see similar energy savings and less heat generation from both units. The efficiency curves are likely very close since they share the same tier and topology. Neither unit has an efficiency advantage over the other. You can expect identical power loss and thermal output under similar loads. This tie means your choice should depend on wattage or size rather than energy cost.
ATX and PCIe version
Both power supplies support ATX 3.1 and PCIe 5.1 standards. They include a native 12V-2x6 connector for modern GPUs, eliminating the need for adapter cables. This ensures stable power delivery for the latest graphics cards from NVIDIA and AMD. Both units are fully modular, allowing you to connect only the cables you need. This reduces clutter and improves airflow inside your case. The compatibility features are identical across both models. You get the same modern connectivity and cable management benefits regardless of which unit you select.
Which SAMA PSU fits your build
High-end gaming and heavy workload users
You need the extra 100 watts from the GT750 to handle high-end graphics cards and multiple high-drain components. The 750W continuous output provides a larger safety margin for future upgrades, ensuring stable power delivery under peak loads without stressing the unit.
Users prioritizing silent operation and airflow
The G650 features a larger 140mm fan compared to the GT750's 120mm unit. This bigger fan can spin slower at the same load, reducing noise in your ECO silent mode. The increased surface area also aids in passive cooling, keeping your build quieter during light tasks.
Builders with compact or specific cases
The G650 is slightly shorter at 5.9 inches, matching the standard ATX length, while the GT750 is 5.5 inches. If your case requires a standard length or if you are using specific cable lengths, the G650's dimensions offer a more conventional fit for many mid-tower chassis.
The products compared
SAMA GT750 750W Gold ATX 3.1
Best for: High-end gaming PCs with modern GPUs
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Gold, Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 120mm
View on Amazon: SAMA GT750 750W Gold ATX 3.1 Affiliate link
The SAMA GT750 is a 750W fully modular power supply with Gold efficiency. It supports ATX 3.1 and PCIe 5.1 standards, featuring a native 12V-2x6 connector for modern GPUs. Japanese capacitors and LLC topology ensure stable performance. The 120mm FDB fan includes an ECO mode for quiet operation at low loads. This white unit suits builders needing reliable power for high-end graphics cards.
Pros
- 750W output with Gold efficiency rating
- ATX 3.1 and PCIe 5.1 compatibility
- Native 12V-2x6 connector for new GPUs
- Fully modular design with embossed cables
- 120mm FDB fan with ECO silent mode
Cons
- Heavier build at 3.53 pounds
- Larger dimensions than standard ATX units
- Limited to white color option
Good fit if
- You need 750W for a high-end GPU
- You want native PCIe 5.1 support
- You prefer fully modular white cables
Skip if
- You require a compact SFX form factor
- You need a black color scheme
- You prefer lower wattage for basic builds
Verdict: SAMA GT750 750W Gold ATX 3.1 delivers stable power for modern gaming rigs with its ATX 3.1 compliance and 12V-2x6 connector. It fits well in builds prioritizing high-end graphics performance and clean white aesthetics.
SAMA G650 ATX 3.1 650W Gold PSU
Best for: mid-range gaming builds with modern GPUs
- Wattage
- 650W
- Efficiency Rating
- Gold, Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 140mm
View on Amazon: SAMA G650 ATX 3.1 650W Gold PSU Affiliate link
The SAMA G650 delivers 650W of power with 80 Plus Gold efficiency. It features ATX 3.1 compliance and a native 12V-2x6 connector for modern graphics cards. Japanese capacitors ensure stable voltage output. The fully modular design allows for clean cable management. A 140mm fan with ECO mode provides quiet operation for gaming systems.
Pros
- 650W output with Gold efficiency rating
- ATX 3.1 standard with native 12V-2x6 connector
- Fully modular cable design for better airflow
- 140mm FDB fan with ultra-quiet ECO mode
Cons
- Lower 650W wattage limits high-end GPU builds
- Heavier at 3.53 pounds than lighter units
- No mention of smart monitoring or app control
Good fit if
- You need a reliable power supply for mid-range gaming PCs
- You want native support for the latest PCIe 5.1 GPUs
- You prefer fully modular cables for clean builds
Skip if
- You require more than 650W of total power
- You need smart monitoring features or app control
- You are building a high-end system with multiple GPUs
Verdict: SAMA G650 ATX 3.1 650W Gold PSU fits users building mid-range gaming PCs who need reliable power for modern graphics cards without the bulk of higher-wattage units.
Specifications side by side
| Spec | SAMA GT750 750W Gold ATX 3.1 | SAMA G650 ATX 3.1 650W Gold PSU |
|---|---|---|
| Wattage | 750W | 650W |
| Efficiency Rating | 80 PLUS Gold, Cybenetics Gold | Gold, Cybenetics Gold |
| Modularity | Fully Modular | Fully Modular |
| ATX Version | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | 12V-2x6 | 12V-2x6 |
| Fan Size | 120mm | 140mm |
| Form Factor | ATX | ATX |
| PCIe Version | PCIe 5.1 | not stated |
| Recommended Use | Gaming | Gaming |
| Connector | 12V-2x6 Connector | not stated |
| Dimensions | 5.5 × 5.9 × 3.3 inches | 5.9 × 5.9 × 3.3 inches |
| Weight | 3.53 pounds | 3.53 pounds |
| Size | Gold GT750 White | Gold G650 Black |
| Color | White | Black |
| Model | HAT-750yzB1 | HAT-650yzB1G |
Frequently asked questions
Does the SAMA GT750 support PCIe 5.1 graphics cards?
Yes, the SAMA GT750 supports PCIe 5.1. This compliance ensures it can handle the power demands of the latest high-end graphics cards without requiring adapters. The unit features a native 12V-2x6 connector, which is essential for connecting modern GPUs securely and efficiently.
Is the SAMA G650 suitable for mid-range gaming builds?
Yes, the SAMA G650 is designed for mid-range gaming builds. It provides 650 watts of continuous power, which is sufficient for most modern mid-tier graphics cards. The fully modular design helps keep cable management clean, making it a practical choice for standard gaming PCs.
What is the physical size difference between the GT750 and G650?
The SAMA G650 is slightly longer than the GT750. The GT750 measures 5.5 inches in length, while the G650 measures 5.9 inches. Both units share the same width and height, so check your case compatibility based on the specific length of your chosen model.
Are both power supplies fully modular?
Yes, both the SAMA GT750 and G650 are fully modular. This means you can connect only the cables you need, reducing clutter inside your case. This feature simplifies installation and improves airflow by eliminating unnecessary cables from your build.
Which PSU offers more wattage for future upgrades?
The SAMA GT750 offers more wattage. It delivers 750 watts of continuous power, compared to the 650 watts from the G650. If you plan to upgrade to a higher-end graphics card or add more components later, the GT750 provides a larger safety margin.
Does the SAMA GT750 come in white?
Yes, the SAMA GT750 is available in white. This color option is ideal for builds that prioritize a clean, white aesthetic. The G650, in contrast, is available in black, so choose based on your preferred color scheme for your PC case.
Do these PSUs use ATX 3.1 standards?
Yes, both units comply with the ATX 3.1 standard. This version ensures compatibility with the latest motherboard and GPU requirements. The standard includes support for PCIe 5.1, which helps maintain stable power delivery for modern high-performance components.
What is the weight of the SAMA GT750?
The SAMA GT750 weighs 3.53 pounds. This weight is consistent with the G650 model. The substantial weight often indicates robust internal components, such as Japanese capacitors, which contribute to overall stability and durability during operation.