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be quiet! Straight Power 12 1200W ATX 3.1 PCIe 5.1 80+ Platinum PSU

Name: be quiet! Straight Power 12 1200W ATX 3.1 PCIe 5.1 80+ Platinum PSU
Brand: be quiet!
SKU: B0CC88BCG9

Status: be quiet! Straight Power 12 1200W ATX 3.1 PCIe…: Unavailable on Amazon as of 2026-10-05 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 be quiet! Straight Power 12 1200W ATX 3.1 PCIe 5.1 80+ Platinum PSU: 80 PLUS Platinum rated, up to 93.8% efficiency; main trade-off: 1200W is overkill for single-GPU mid-range builds.

Unavailable on Amazon as of 2026-10-05 22:26 UTC

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

Similar: SAMA P1200 1200W Platinum Power Supply — $134.99 on Amazon as of 2026-10-06 22:12 UTC (price may vary).

View Current Price — $134.99

Similar: be quiet! Power Zone 2 1200W — $169.90 on Amazon as of 2026-10-07 04:20 UTC (price may vary).

View Current Price — $169.90

Similar: be quiet! Pure Power 12 M 1200W — $127.40 on Amazon as of 2026-10-07 04:20 UTC (price may vary).

View Current Price — $127.40

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

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-05

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

✓ 80 PLUS Platinum rated, up to 93.8% efficiency
✓ ATX 3.1 with PCIe 5.1 support for current GPUs
✓ Designed to absorb massive transient power excursions
✓ 135mm Silent Wings fan in a funnel-shaped intake
✓ 10-year manufacturer's warranty on the unit

Cons

✗ 1200W is overkill for single-GPU mid-range builds
✗ Platinum tier costs more than a Gold equivalent
✗ Full modular cable set adds bulk to route
✗ 135mm fan may not match 140mm mounting cutouts

Manufacturer description

The be quiet! Straight Power 12 1200W is built for systems where a PCIe 5.1 graphics card and a high-core-count CPU share the same rail. It carries 80 PLUS Platinum certification with efficiency rated up to 93.8%, so less of what you pull from the wall turns into heat inside your case. The ATX 3.1 design handles the massive power excursions modern GPUs generate, and native support for PCIe 5.0 cards plus 6+2 pin connectors means you can run current or previous-generation hardware without adapter clutter. Inside, full bridge LLC topology delivers stable signal quality, a single…

SpecPicks Verdict

SpecPicks scored be quiet! Straight Power 12 1200W ATX 3.1 PCIe 5.1 80+ Platinum PSU using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. be quiet!'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.

Frequently Asked Questions

Does this PSU support PCIe 5.1 and the 12V-2x6 connector?

Yes. The Straight Power 12 1200W is an ATX 3.1 / PCIe 5.1 unit with full support for PCIe 5.0 GPUs and cards using 6+2 pin connectors.

How loud is the be quiet! Straight Power 12 1200W?

be quiet! rates the 135mm Silent Wings fan as virtually inaudible, and the funnel-shaped opening in the PSU case increases airflow intake so the fan works less under the same load.

What warranty does be quiet! offer on this power supply?

The unit carries a 10-year manufacturer's warranty. Check the product listing for current registration requirements and regional terms.

Is 1200W enough for an RTX 5090 or similar flagship GPU build?

The unit is built around one massive high-performance 12V rail and is rated to handle massive power excursions, which is the failure mode flagship cards create. Confirm your specific GPU's recommended PSU wattage with its manufacturer.

Key Features

80 PLUS Platinum efficiency (up to 93.8%)
ATX 3.0 PSU with full support for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors
Handles massive power excursions
Virtually inaudible Silent Wings 135mm fan
Funnel-shaped fan opening on PSU case for high airflow intake

Full Specifications

Brand	be quiet!
Wattage	12 watts
Model Name	BN517
Unit Count	1 Count
Form Factor	ATX
Model Number	BN517
Connector Type	ATX
Cooling Method	Air
Number of Fans	1
Output Wattage	1200
Item Dimensions	7.09 x 5.91 x 3.39 inches
Mfr Part Number	BN517
Number of Items	1
Number of Packs	1
Compatible Devices	Desktop
Power Supply Design	Full Modular
Warranty Description	1 Year
Maximum Input Voltage	240 volts
Minimum Input Voltage	110 volts
Item dimensions L x W x H	7.09 x 5.91 x 3.39 inches

Ready to buy?

Amazon shows no buyable offer for be quiet! Straight Power 12 1200W ATX 3.1 PCIe… at the last check. A similar in-stock product is SAMA P1200 1200W Platinum Power Supply. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Similar — $134.99