Thermaltake

Thermaltake Smart BM3 850W 80Plus Bronze ATX 3.1 & PCIE 5 Ready Semi-Modular Power Supply; 105°C/221°F Japanese Capacitor; 5 Year Warranty; PS-SPD-0850MNFABU-3

Name: Thermaltake Smart BM3 850W 80Plus Bronze ATX 3.1 & PCIE 5 Ready Semi-Modular Power Supply; 105°C/221°F Japanese Capacitor; 5 Year Warranty
Brand: Thermaltake
SKU: B0CFWMX4R8

Status: Thermaltake Smart BM3 850W 80Plus Bronze ATX 3.1…: Unavailable on Amazon as of 2026-10-06 22:26 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The Thermaltake Smart BM3 850W 80Plus Bronze ATX 3.1 & PCIE 5 Ready: 850W with ATX 3.1 support and a native PCIe Gen 5 12V-2x6 connector; main trade-off: semi-modular only — main ATX and CPU cables are fixed.

Unavailable on Amazon as of 2026-10-06 22:26 UTC

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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:

Similar: MSI MAG A850GL PCIE5 — $109.99 on Amazon as of 2026-10-06 12:20 UTC (price may vary).

View Current Price — $109.99

Similar: Thermaltake Smart BM3 650W 80Plus Bronze ATX 3.1… — $47.99 on Amazon as of 2026-10-06 12:20 UTC (price may vary).

View Current Price — $47.99

Similar: Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1… — $79.99 on Amazon as of 2026-10-06 10:27 UTC (price may vary).

View Current Price — $79.99

Original listing (currently unavailable) → Compare to similar power supplies

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-06

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ 850W with ATX 3.1 support and a native PCIe Gen 5 12V-2x6 connector
✓ Japanese 105°C/221°F main capacitor for thermal endurance
✓ 5-year warranty on a value-tier PSU
✓ 120mm fluid-dynamic-bearing fan, silent below 20% load (Smart Zero Fan)

Cons

✗ Semi-modular only — main ATX and CPU cables are fixed
✗ 80 Plus Bronze efficiency trails Gold and Platinum units
✗ Single 12V-2x6 connector limits multi-GPU or high-draw setups
✗ Bronze tier runs warmer than higher-efficiency supplies

Manufacturer description

Smart BM3 80 PLUS Bronze certified semi modular PSU (650W/750W/850W) is designed to meet ATX 3.1 standards, it also comes with one PCIe Gen 5 (12V-2x6) connector to support modern graphics cards. With an ample 5-year warranty, the Smart BM3 series is able to satisfy the market, where value-oriented users are looking for a new power supply with all the latest features. Featuring a 120mm FDB fan to deliver excellent airflow. Furthermore, with the Smart Zero Fan function the fan will not spin until the load exceeds 20% of the power supply, minimizing undesired noise. It also built with high…

SpecPicks Verdict

SpecPicks scored Thermaltake Smart BM3 850W 80Plus Bronze ATX 3.1 & PCIE 5 Ready… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Thermaltake's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

80Plus Bronze certified and fully compatible with Intel ATX 3.1 standards to power up next generation hardware
PCIe Gen. 5 compliant
High quality Japanese 105°C/221°F main capacitor
120mm fluid dynamic bearing fan with Smart Zero Fan function
Built-in Industrial Grade Protection

Full Specifications

Brand	Thermaltake
Wattage	650 watts
Fan Size	120 Millimeters
Model Name	Smart BM3 850
Unit Count	1.0 Count
Form Factor	ATX
Model Number	PS-SPD-0850MNFABU-3
Connector Type	ATX, Molex, PCI Express, SATA
Cooling Method	Air
Number of Fans	1
Output Wattage	850
Item Dimensions	5.9 x 5.5 x 3.4 inches
Mfr Part Number	PS-SPD-0850MNFABU-3
Compatible Devices	Personal Computer
Connector Quantity	5
Power Supply Design	Semi-Modular
Warranty Description	5 Year Manufacturer
Maximum Input Voltage	240 Volts (AC)
Minimum Input Voltage	115 Volts
Item dimensions L x W x H	5.9 x 5.5 x 3.4 inches

Ready to buy?

Thermaltake Smart BM3 850W 80Plus Bronze ATX 3.1 & PCIE 5 Ready Semi-Modular Power Supply; 105°C/221°F Japanese Capacitor; 5 Year Warranty; PS-SPD-0850MNFABU-3 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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