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The GAMDIAS Kratos M1-750W is a 750-watt, 80 PLUS Bronze power supply whose standout feature is built-in RGB lighting—not its electrical performance. Independent testing found ordinary Bronze-level efficiency, rising ripple and heat under heavy load, and noticeable fan noise. It is difficult to recommend near its roughly $80 regular price; around $60, it is a conditional option for a moderate-power build if RGB matters more to you than a newer platform, quieter operation, or easier cable management.
What the Kratos M1-750W is—and what it is not
GAMDIAS calls the unit the KRATOS M1-750B; reviews and retailers often shorten that to M1-750W. It is a non-modular, 750-watt ATX12V v2.2 PSU with a single +12V rail rated for 60 A, or 720 W. That 720 W figure is the more relevant headline for a CPU- and GPU-heavy PC. The manufacturer lists 80 PLUS Bronze efficiency, built-in RGB effects, motherboard lighting sync, and flat cables permanently attached to the unit. GAMDIAS’s specification page does not identify it as an ATX 3.x or PCIe 5.x-native model.
Bronze is an efficiency certification, not a grade for overall PSU quality. It does not certify low ripple, quiet operation, thermal headroom, a modern internal platform, or long-term reliability. Those require separate evidence; in this case, the most useful evidence is the laboratory testing in Tom’s Hardware’s review.
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| Item | GAMDIAS specification |
|---|---|
| Rated output | 750 W total; +12 V rated at 60 A / 720 W |
| +3.3 V and +5 V | 20 A each; 130 W combined capacity |
| +5VSB and -12 V | +5VSB: 2.5 A / 12.5 W; -12 V: 0.3 A / 3.6 W |
| Input | 100–240 V, 47–63 Hz |
| Efficiency label | 80 PLUS Bronze |
| Form factor and size | ATX12V v2.2; 140 × 150 × 86 mm |
| Modularity | Non-modular; cables are permanently attached |
| Motherboard and CPU | One 20+4-pin main connector; two 4+4-pin CPU connectors |
| GPU power | Four 6+2-pin PCIe connectors |
| Other power | Five SATA, two Molex, and one floppy connector |
| Lighting | 30 built-in Neon-Flex effects; 5 V, 3-pin addressable RGB motherboard sync |
| Protections listed by GAMDIAS | OVP, UVP, OPP, SCP, and SP |
These are manufacturer-listed specifications; the user manual provides installation details. The unit’s attached cables can make a compact case harder to tidy: unused leads still need to be stowed. Check connector counts against the exact motherboard, graphics card, storage devices, and accessories before buying.
#1 Best Overall
- ATX 3.1 READY: GAMDIAS new 80+ gaming PSU Engineered to meet the latest connectivity standards, this PSU is ATX 3.1 ready, supporting up to 200% power excursion. Furthermore, it delivers an impressive 60% efficiency at low loads while complying with all essential power supply timing standards.
- PCIe GEN 5.1 READY: The HELIOS M2-850B features a PCIe 12V-2x6 connector, providing powerful and stable performance, enabling the PSU to support next-generation GPUs seamlessly.
- 80+ Bronze Certified Efficiency: GAMDIAS 80 plus bronze power supplies give the best and economic solution for the power transfer for your gaming computer pc systems
- High AMP. Single +12V Rail & DC to DC Design: The HELIOS M2-850B’s single +12V rail ensures reliable power delivery and compatibility, while its DC to DC design offers stable operation and precise voltage regulation. High-quality capacitors further enhance performance and durability.
- Automatic Fan Speed Optimization: GAMDIAS ECO fan speed control system adjusts the fan speed with the excellent balance between the power loading and noise
What independent testing found
Tom’s Hardware tested efficiency at 115 V and 230 V, measured regulation and ripple, examined performance in cold and hot conditions, tested protections, and inspected the internal platform. These are results from its test sample, not a guarantee that every production unit behaves identically.
| Test area | Reported result | What it means for a buyer |
|---|---|---|
| Average efficiency, 20–100% load | About 86.2% at 115 V and 87.4% at 230 V | Ordinary Bronze-level performance, not a standout efficiency advantage. |
| 230 V full-load efficiency | About 84.8%; the review reported that it narrowly missed the Bronze requirement at full load | The Bronze label should not be mistaken for uniformly strong results at every test point. |
| Voltage regulation | 2.1% on +3.3 V, 3.6% on +5 V, and 2% on +12 V | Usable results, but not a compelling performance case against newer designs. |
| Cold-test ripple at full load | 40 mV on +3.3 V, 44 mV on +5 V, and 106 mV on +12 V | The +12 V figure is close to the relevant design-guide limit; the review also found ripple rose sharply under hot, heavy loading. |
| Average efficiency at approximately 45°C ambient | About 85.5% at 230 V and 84.3% at 115 V | Heat reduced efficiency, with the decline becoming particularly severe above 90% load. |
| Protection test | The tested sample’s over-current, over-voltage, over-power, and short-circuit protections engaged; over-power protection activated at about 120% of rated capacity, or roughly 900 W | Successful protection tests are useful evidence, but do not demonstrate long-term reliability or make sustained overload advisable. |
Tom’s Hardware also reported +12 V ripple increasing from roughly 40 mV to more than 100 mV across the upper loading range in hot testing. The practical concern is the combination of high heat and deteriorating electrical performance near maximum output—not a finding that every unit is categorically unsafe. The review did not establish long-term failure rates.
Older internal design, with practical trade-offs
The teardown identified Andyson as the manufacturer behind the unit and described an older half-bridge, double-forward platform. Its +3.3 V and +5 V rails use group regulation, and it has no DC-to-DC conversion on the secondary side. In a modern PC, CPU and GPU demand is concentrated on +12 V; the smaller rails may be loaded differently. Group-regulated designs can respond less well to that kind of cross-load than newer DC-to-DC designs, which is consistent with the review’s unremarkable regulation results.
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Tom’s Hardware identified Jun Fu secondary capacitors and Magnachip 60R190P primary switching MOSFETs. The review did not present the capacitor brand alone as proof of poor quality. The stronger basis for caution is the platform and the measured hot-load behavior, rather than an assumption based on a component name or the OEM identity.
Rank #2
- ATX 3.1 & PCIe 5.1 Certified: Future-proof your build. Fully compliant with Intel ATX 3.1 and PCIe 5.1 for seamless compatibility with NVIDIA RTX 40/50 Series GPUs. Includes a native 12V-2x6 cable delivering up to 600W of direct power-eliminating melting adapters and safely handling 200%+ transient power spikes
- Ultra-Quiet 148mm Fan: Enjoy LAMBDA A++ certified silent performance, measured at just 13.42dB average at 750W load. Featuring one of the largest fans in standard ATX PSUs, it spins at significantly lower RPMs, delivering superior cooling efficiency and near-silent operation even under full gaming loads.
- Cybenetics Gold Dual-Certification: Cooler, quieter, and more efficient. Achieves an elite 87%+ efficiency rating via advanced LLC resonant topology. Unlike basic 80 PLUS tests, this rigorous dual-certification guarantees superior power efficiency AND acoustics, reducing heat and extending system lifespan
- 100% Japanese Capacitors with 10-Year Warranty: Built to outlast the competition. Engineered with premium 105C Japanese electrolytic capacitors for rock-solid stability under sustained loads. Backed by our hassle-free 10-year warranty and responsive support
- Fully Modular With Premium Flat Cables: Build like a pro, look like a pro. All cables are detachable-use only what you need for a cleaner interior, improved airflow, and easier installation especially in compact cases. Features premium flexible flat cables in stealth black that route effortlessly through tight spaces and behind motherboard trays for custom builders who demand both performance and aesthetics
Heat, fan noise, and the “Silent Mode” switch
The fan always spins; this is not a zero-RPM or semi-passive PSU. With Silent Mode enabled, the fan follows the normal temperature-based profile. Turning the mode off forces the fan to maximum speed. Tom’s Hardware found the PSU quiet at very low load, more noticeable around half load, and loud under heavy load—especially in a hot environment. Buyers building a quiet PC, or placing the computer in a warm, poorly ventilated space, should look elsewhere.
RGB setup and cable compatibility
The PSU has its own lighting effects, and GAMDIAS describes motherboard synchronization through a 5 V, 3-pin addressable RGB connection. A compatible header is needed for motherboard sync; the product page says the onboard lighting button can control effects without that connection.
- Do not connect the lighting lead to a 12 V, 4-pin RGB header. It is a different voltage and connector type and could damage the lighting hardware.
- Check that the motherboard has a 5 V, 3-pin ARGB header if synchronized lighting is important.
- Confirm the four 6+2-pin PCIe plugs and all other attached connectors suit the planned components. Do not assume a connector count alone proves compatibility with a particular GPU.
Because the official specification is ATX12V v2.2 and does not list a native 12V-2×6 connector, this is not a modern-connector-first choice. A graphics card that requires a 12V-2×6 connection may use an adapter, depending on the exact model, but compatibility and power behavior depend on the whole system. For a new high-end build, prefer a suitable PSU with the native connector and platform support the card requires, and follow the GPU maker’s cable instructions exactly.
Which builds make sense?
Moderate-power gaming PC
It is a conditional possibility for a budget build that does not routinely run near the PSU’s limits, particularly if integrated RGB is a priority and the price is well below alternatives. Use the CPU and GPU manufacturers’ PSU recommendations as a starting point, then account for the complete system, including storage, fans, USB-powered accessories, and any planned upgrade. No fixed headroom percentage guarantees safety.
Rank #3
- Pure Power 12 750W is certified 80 PLUS Gold with an outstanding efficiency rating of up to 92.8% . The most compelling benefit: lower power consumption, consequently lower costs, and above all a cooler as well as quieter operation. Pure Power 12 750W is always the correct choice for quiet systems and gaming PCs!
- Pure Power 12 750W is an ATX 3.1 PSU and comes with both native integration of the 12V-2x6 connector for next-generation PCIe 5.1 graphics cards, and 3 PCIe 6+2-pin connectors for support of current-gen GPUs. This makes the PSU extremely versatile and the perfect choice for powerful systems of today and the ones to come.
- Pure Power 12 offers 750W of continuous power with one massive 12V rail. Even if the graphics card demands excessive power for a short time: Pure Power 12 750W handles power excursions up to double its rated power with ease. This ensures reliable operation with the next generation of processors and graphics cards.
- The exceptionally silent 120mm be quiet! fan is temperature-controlled to strike the best balance between effective cooling and quietness. Airflow-optimized fan blades reduce turbulence, enabling best-in-class quiet functionality.
- With its LLC topology Pure Power 12 750W provides best-in-class voltage regulation and efficiency. That makes it perfect for building very quiet systems or upgrading gaming and media creation PCs.
High-end gaming or future GPU upgrade
Choose a newer, independently tested PSU instead. The Kratos’s nominal 750 W rating does not establish that it is a strong match for every high-end GPU: sustained load, transient demand, connector requirements, and the rest of the system all matter. Its age and lack of a listed native 12V-2×6 connector make it a weaker platform for a new premium build.
Workstation or other sustained heavy load
A rendering workstation or any system that spends long periods at high output is a poor fit. The hot test showed efficiency falling and ripple rising as load increased, precisely where prolonged operation leaves less thermal margin.
Quiet or warm-room build
Look for a PSU with independently measured low noise at the load your system will actually use, and adequate thermal performance for your environment. The Kratos’s always-spinning fan and loud heavy-load behavior work against both goals.
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Price and alternatives
Tom’s Hardware assessed the Kratos at approximately $80 at normal retail and about $60 on sale; those are review-era price points, not a live price guarantee. As of the available 2026-08-16 listing snapshot, Walmart Business showed roughly $64.99, while product availability can be limited and seller condition should be checked. A marketplace listing or a single customer rating is not evidence of a product-wide failure rate. Check the listing for current stock, seller, and condition.
Rank #4
- 750W 80 PLUS Bronze ATX Power: Delivers 750W rated output with 80 PLUS Bronze efficiency and up to 62A / 744W on the +12V rail, providing reliable power for mainstream gaming PCs, multi-drive systems, and everyday desktop upgrades.
- DC-to-DC Stability with Active PFC: DC-to-DC architecture and Active PFC help maintain stable voltage across key power rails for consistent output during gaming, rendering, multitasking, and everyday PC use.
- Japanese 105°C Capacitors for Long-Term Reliability: Built with Japanese 105°C electrolytic capacitors, EMI filtering, and a double-sided copper PCB to support stable power delivery, heat resistance, and long-term reliability under sustained system loads.
- Complete Connector Set with Flat Non-Modular Cables: Includes 1× 20+4-pin motherboard, 2× CPU 4+4-pin, 3× PCIe 6+2-pin, 4× SATA, and 2× PATA connectors. Fixed flat black cables help simplify routing, while the 120mm FDB fan provides dependable cooling for everyday and gaming builds.
- Six Protection Features & 5-Year Warranty: OVP, OCP, OPP, SCP, OTP, and UVP protections help safeguard your PC against abnormal voltage, current, overload, short-circuit, and temperature conditions. Backed by a darkFlash 5-year warranty.
| Option | Price signal in available listing snapshot | What the listing suggests | What to verify |
|---|---|---|---|
| GAMDIAS Kratos M1-750B | About $64.99 on Walmart Business | 750 W, Bronze, built-in RGB; budget styling focus | Current stock, seller and condition, regional warranty, and whether the cables fit the build. |
| Corsair CX750M | About $59.99 on Newegg | Semi-modular cabling at a similar price signal | Exact revision, seller, warranty, and independent test results; do not infer test quality from brand or modularity alone. |
| SAMA G750W ATX 3.1 | About $66.99–$69.99 on Newegg | Listing advertises ATX 3.1, PCIe 5.1 readiness, full modularity, and Cybenetics Gold | Exact model and seller, warranty, and independent test coverage before treating listing claims as equivalent to lab results. |
| MSI MAG A750BN PCIE5 | About $79.99 on Newegg | Listing advertises PCIe 5 support and a five-year warranty; it is also non-modular and Bronze-rated | Exact revision, warranty terms, and independent performance results; newer support does not establish superiority in every electrical or acoustic category. |
| Antec GSK750 V2 | About $99.99 on Newegg | Listing advertises ATX 3.1, PCIe 5.1 readiness, full modularity, Gold certification, and a ten-year warranty | Seller, warranty terms, and independent testing; it costs materially more than the Kratos. |
These are volatile listing price signals, not guaranteed offers, and the available retailer information does not establish comparable laboratory results for each alternative. The listings appear together in Newegg’s search results; confirm the exact product and seller before purchase. At a similar price, a newer design may offer more useful connectors or easier cabling, but prioritize independent electrical, thermal, and noise testing over efficiency labels or feature lists alone.
Warranty and final verdict
Historical retailer and manufacturer promotional material indicates a three-year warranty, but it does not establish current coverage in every country or for every seller and revision. Confirm the warranty that applies to your purchase before relying on it; the historical reference is a Newegg/GAMDIAS promotional document.
The Kratos M1-750W is a functional budget Bronze PSU with appealing integrated RGB, but independent tests point to an older design, modest electrical results, heat-related performance decline, and load noise. At about $80, skip it. Around $60, consider it only for a moderate-power PC where RGB is unusually important and a newer, better-tested alternative is not a better fit. For expensive modern hardware, sustained heavy use, or a quiet build, buy a newer PSU with suitable native connectors and stronger independent test evidence.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
