Looking for an honest be quiet! Straight Power 12 1500W ATX vs Corsair RM1000x comparison in 2026? We scored both power supplies on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. In our overall scoring the be quiet! Straight Power 12 1500W ATX comes out ahead 66/100 to 59/100 — a 7-point gap. The widest gap is in battery life, where the Corsair RM1000x pulls noticeably ahead. On price the Corsair RM1000x undercuts the be quiet! Straight Power 12 1500W ATX by 67% ($179 vs $298.99), which materially changes the value calculus for budget-conscious buyers.
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be quiet! Straight Power 12 1500W ATX narrowly beats the Corsair RM1000x in the power supplies category, especially in design, scoring 66 vs 59. If you want the better overall power supplies, be quiet! Straight Power 12 1500W ATX is the recommended choice.
Picking be quiet! Straight Power 12 1500W ATX over Corsair RM1000x means trading these off.
Specs are roughly matched — winner decided on overall scoring, not a specific spec advantage.
be quiet!
$299
Scores are relative within the power suppliescategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
| Spec | be quiet! Straight Power 12 1500W ATXW | Corsair RM1000x |
|---|---|---|
| Price | 298.99$ | 179$✓ |
| Weight | 2200g | — |
| Dimensions | 150 x 86 x 160 mm | 150 x 86 x 160 mm |
| Colors | Black | Black |
Buy be quiet! Straight Power 12 1500W ATX if…
Buy the be quiet! Straight Power 12 1500W ATX if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
Buy Corsair RM1000x if…
Choose the Corsair RM1000x if budget is your top priority — it offers competitive specs at a lower price point.
be quiet! Straight Power 12 1500W ATX narrowly beats the Corsair RM1000x in the power supplies category, especially in design, scoring 66 vs 59. If you want the better overall power supplies, be quiet! Straight Power 12 1500W ATX is the recommended choice.
Yes, be quiet! Straight Power 12 1500W ATX scores higher overall (66 vs 84).
Corsair RM1000x is cheaper at $179 vs $298.99 for the be quiet! Straight Power 12 1500W ATX.
Buy the be quiet! Straight Power 12 1500W ATX if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
Choose the Corsair RM1000x if budget is your top priority — it offers competitive specs at a lower price point.
Reviewed by VersusMatrix Editorial Team
Last updated: May 31, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.