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The Thermalright TR-KG750 offers 750W, full modularity, ATX 3.1 and PCIe 5.1 connectivity, and a native 12V-2×6 cable. But Tom’s Hardware’s September 2026 tests found only slim margins over the 115V 80 PLUS Gold efficiency thresholds and loud operation near full load. The reviewer identifies the tested unit’s platform as HKC’s HKCMAX-750, rather than a Thermalright-designed platform. Its $91 price was the review-time US figure, not a verified current price.
What the TR-KG750 is—and who makes the tested platform
Thermalright’s official product page calls the model KG-750; Tom’s Hardware reviewed the 750W TR-KG750. The reviewer’s inspection found the internal model marking HKCMAX-750 and interpreted the board and unit markings as identifying an HKC platform. The review also reports Somore Tech Co., Ltd. as the manufacturer of record and credits production to Jiushouyangguang Power Supply (Shenzhen). This platform identification comes from the reviewer’s inspection, not from Thermalright’s product page. (Thermalright specifications; Tom’s Hardware review, September 11, 2026)
The board silkscreen was marked ATX32 Main BD Rev1.2, with an April 2023 date, according to the review. That is evidence about the inspected sample; it does not establish the manufacture date or internal platform of every unit sold under the model name.
Specifications and connectors
Thermalright lists a 750W, 80 PLUS Gold, fully modular supply with a 100–240Vac input range, 120mm fan, 0–40°C operating range, and five-year warranty. Its product page lists OPP, OVP, OTP, OCP, SCP, and UVP protections. Tom’s Hardware identifies the reviewed model as ATX 3.1 and PCIe 5.1 compliant, with a native 12V-2×6 cable and a 140mm-deep body. (Thermalright KG-750 product page; Tom’s Hardware review)
#1 Best Overall
- 80 PLUS Gold Certified: Achieves up to 90% energy efficiency, reducing power waste and operating costs while maintaining stable performance
- ATX 3.1 & PCIe 5.1 Compliant: Ready for next-generation components with improved power delivery standards and compatibility
- Native 12V-2x6 Connector: Dual-color design supports up to 450W power delivery for modern high-performance graphics cards
- Quiet 120mm Cooling Fan: Optimized for low-noise operation while providing effective thermal management
- Reliable Power Output: 750W capacity handles mid-range to high-end system configurations with stability
- 1 ATX 24-pin connector
- 2 EPS 4+4-pin connectors
- 1 PCIe 5.1/12V-2×6 connector
- 2 PCIe 8-pin connectors
- 6 SATA connectors
- 3 Molex connectors
Check your graphics card’s connector and power requirements, motherboard connections, and the PSU’s physical depth before buying. The native 12V-2×6 lead means the review gives no reason to add a separate GPU power cable. Modular PSU cables are model-specific; do not assume a cable from another supply will fit safely.
Efficiency: Gold performance, but little margin at 115V
Tom’s Hardware tested the unit at 25°C. At 115 VAC, it measured 87.2% efficiency at 20% load, 90.3% at 50%, and 87.9% at full load. Those figures exceed the Gold thresholds cited in the review—87%, 90%, and 87% at those load points—by 0.2, 0.3, and 0.9 percentage points, respectively. The review reports average efficiency across its nominal load range of 88.5% at 115 VAC and 89.5% at 230 VAC. (Tom’s Hardware test results)
Rank #2
- 80 PLUS GOLD CERTIFIED
- 10-year limited warranty, guaranteeing long term reliable operation
- Fully modular design
- ATX 3.1 & PCIE 5.1
At a sustained 750W in the 25°C test, measured efficiency was 87.9% at 115 VAC and 89.2% at 230 VAC. The review says the PSU’s own 80 PLUS report was slightly more favorable than its measurements. The measured results therefore support a narrow pass at the cited 115V Gold thresholds, not an especially large efficiency cushion.
Noise and heat under load
The fan runs continuously. In Tom’s Hardware’s 25°C testing, noise reached nearly 51 dB(A) at 750W, while the heatsinks were around 60°C. That is a meaningful trade-off if the PSU will often run close to its rated output or sit in a quiet room. (Tom’s Hardware review)
Rank #3
- 80Plus Gold certified and Intel C6/C7 state and ErP Ready
- Smart Zero Fan: minimizes undesired noise
- Ultra quiet 140mm fluid bearing fan
- High amperage single plus 12V rail with DC to DC design
- Built-in industrial grade protections
The review also tested at approximately 45°C ambient, five degrees above Thermalright’s stated 40°C operating limit. At sustained 750W in that out-of-rating stress test, the PSU completed the load steps without shutting down, but efficiency fell to 84.5% at 115 VAC and 85.8% at 230 VAC. Noise reached 58 dB(A), and the primary heatsink exceeded 100°C. These results describe behavior beyond the stated operating range; they should not be treated as normal in-spec performance or as a prediction for every installation.
Electrical regulation and protection findings
In its tests, Tom’s Hardware measured 12V regulation within 1.8% across the stated load range and 62mV of ripple at full load, against the 120mV ATX limit cited by the review. The reviewer also reports that tested protection mechanisms triggered, with over-power protection (OPP) activating at approximately 1,005W, or 134% of rated output. These are results for the tested sample and conditions, not a guarantee about every production unit. (Tom’s Hardware measurements)
Rank #4
- Fully Modular PSU: Reliable and efficient, low-noise power supply with fully modular cabling, so you only have to connect the cables your system build needs.
- Intel ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting PCIe 5.1 platform withstands 2x transient power excursions from the GPU.
- Keeps Quiet: A 120mm rifle bearing fan with a specially calculated fan curve keeps fan noise down, even when operating at full load.
- 105°C-Rated Capacitors: Delivers steady, reliable power and dependable electrical performance.
- Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
Price and buying considerations
Tom’s Hardware published its review on September 11, 2026, with a US price of $91. The review displayed a Walmart price check at that figure and also showed Amazon and Best Buy checks without prices in the page text. That dated figure does not confirm today’s price, stock, seller, or the identity of a current listing. Verify the exact TR-KG750 variant and retailer details before purchasing. (Tom’s Hardware review)
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsThe value case depends on whether its feature set offsets the noise and limited efficiency margin for your build. Tom’s Hardware’s reviewer, E. Fylladitakis, summarized the review’s case this way: “The $91 price and five-year warranty are the argument.” That is the reviewer’s dated verdict, not a current-price guarantee.
Best Value
- High Efficiency & Stability: Rated 80 Plus Bronze certified (≥85% efficiency) with rock-solid voltage regulation for reliable PC performance under load.
- Whisper-Quiet Cooling: Engineered with a silent, durable 120mm fan that delivers effective cooling while minimizing noise disruption during intense gaming sessions.
- Versatile Powerhouse: Semi-modular design and 750W capacity (ATX standard) offers flexible cable management and robust wattage headroom for demanding gaming rigs & upgrade paths.
- Comprehensive Safety Armor: Full suite of protections including OVP, UVP, OPP, and SCP guards your components against electrical faults and surges.
- Clean Aesthetics: Features sleek all-black cables - no garish red/yellow "ketchup & mustard" colors – ensuring a sophisticated build look inside your case.
Verdict
The TR-KG750 is a feature-rich 750W option on paper: it is fully modular, carries a native 12V-2×6 cable, and is identified by the reviewer as ATX 3.1 and PCIe 5.1 compatible. The tested unit’s measured electrical performance was within the review’s cited limits, but its 115V Gold efficiency results cleared the thresholds by narrow margins, and full-load noise was high. Consider it only after checking current price and exact SKU, and weigh the noise particularly carefully if your system will regularly draw close to 750W.
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.
