# Best Power Supplies: the stierproducts tier list - Source: https://stierproducts.com/categories/power-supplies - Last researched: 2026-08-16T03:44:05.819Z - Products ranked: 15 - Method: https://stierproducts.com/methodology - Reuse: Text, rankings, tier assignments, LP values and verdicts are free to quote and reuse with attribution to stierproducts and a link to the source URL (CC BY 4.0: https://creativecommons.org/licenses/by/4.0/). Product photographs are not covered: they belong to their respective owners and are reproduced to illustrate the product being reviewed. Do not redistribute them under this licence. PC power supply units (PSUs). ## Summary On the stierproducts power supplies board, be quiet! Dark Power 14 1000W ranks #1 in S tier, ahead of Seasonic Prime TX-1600 Noctua Edition (#2, A tier) and Corsair RM750e (#3, A tier). The board ranks 15 power supplies from S (best) to F (avoid), last researched 16 Aug 2026, drawing on 219 outlet citations across the board. Placed in the bottom tiers as ones to avoid: NZXT C850 SFX Gold, EVGA SuperNOVA 850 G5, Thermaltake Smart 700W, and 2 others. ## Ranking | Rank | Product | Brand | Tier | LP | Outlets | Verdict | Page | | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | be quiet! Dark Power 14 1000W | be quiet! | S | 922 | 10 | Excellent performance and noise level at a mid-range price. | https://stierproducts.com/products/be-quiet-dark-power-14-1000w | | 2 | Seasonic Prime TX-1600 Noctua Edition | Seasonic | A | 809 | 22 | Unmatched efficiency and silence for the price of a high-end PSU. | https://stierproducts.com/products/seasonic-prime-tx-1600-noctua-edition | | 3 | Corsair RM750e | Corsair | A | 733 | 19 | Reliable, fully modular, and well-balanced for most users. | https://stierproducts.com/products/corsair-rm750e | | 4 | be quiet! Pure Power 13 M 850W | be quiet! | A | 689 | 9 | The Pure Power 13 M is a fully-modular, 850 W PSU that delivers 90 % Platinum efficiency and a 3-year warranty. | https://stierproducts.com/products/be-quiet-pure-power-13-m-850w | | 5 | Corsair RM850e | Corsair | B | 618 | 23 | Corsair’s RM850e is a fully-modular, 850 W PSU that offers 90 % Platinum efficiency and excellent build quality. | https://stierproducts.com/products/corsair-rm850e | | 6 | MSI MAG A750GL PCIE5 | MSI | B | 590 | 23 | PCIe 5.0 readiness gives it a future-proof edge over similar wattages. | https://stierproducts.com/products/msi-mag-a750gl-pcie5 | | 7 | Super Flower Leadex V Platinum Pro 1000W | Super Flower | B | 579 | 6 | Leadex V Platinum Pro is a 1000 W PSU that offers the highest efficiency (96 % Platinum) and the best price-performance for high-end builds. | https://stierproducts.com/products/super-flower-leadex-v-platinum-pro-1000w | | 8 | Seasonic Focus GX-850 | Seasonic | B | 533 | 15 | Seasonic’s Focus GX-850 is a fully-modular, 850 W PSU that delivers 90 % Gold efficiency and excellent build quality. | https://stierproducts.com/products/seasonic-focus-gx-850 | | 9 | Corsair SF750 | Corsair | B | 519 | 26 | The SFX benchmark with platinum efficiency and excellent support; small-form-factor buyers have no better long-term bet. | https://stierproducts.com/products/corsair-sf750 | | 10 | MSI MAG A850GL PCIE5 | MSI | C | 492 | 25 | The MSI MAG A850GL is a fully-modular, 850 W PSU that supports PCIe 5.0 and delivers 90 % Gold efficiency. | https://stierproducts.com/products/msi-mag-a850gl-pcie5 | | 11 | NZXT C850 SFX Gold | NZXT | D | 305 | 15 | Compact form factor is nice, yet it lags in noise and build quality compared to peers. | https://stierproducts.com/products/nzxt-c850-sfx-gold | | 12 | EVGA SuperNOVA 850 G5 | EVGA | F | 62 | 5 | Good all-rounder but slightly behind the Corsair and MSI units in price/performance. | https://stierproducts.com/products/evga-supernova-850-g5 | | 13 | Thermaltake Smart 700W | Thermaltake | F | 9 | 11 | The Thermaltake Smart 700W is a budget PSU that only offers 80 % Bronze efficiency and has been criticized for noisy operation. | https://stierproducts.com/products/thermaltake-smart-700w | | 14 | Gigabyte GP-P750GM | Gigabyte | F | 0 | 7 | The Gigabyte GP-P750GM is a non-modular, 750 W PSU that offers only 80 % Bronze efficiency and has been noted for its noisy fan. | https://stierproducts.com/products/gigabyte-gp-p750gm | | 15 | Corsair CV650 | Corsair | F | 0 | 3 | Corsair’s CV650 is a very low-cost, non-modular PSU that only delivers 80 % Bronze efficiency and lacks the build quality of higher tiers. | https://stierproducts.com/products/corsair-cv650 | ## Flagged as ones to avoid These entered one or more research runs as a product buyers cross-shop but should not buy, rather than as a pick. - EVGA SuperNOVA 850 G5 (#12, F tier): flagged by 3 of 6 runs. - Thermaltake Smart 700W (#13, F tier): flagged by 3 of 6 runs. - Gigabyte GP-P750GM (#14, F tier): flagged by 4 of 7 runs. - Corsair CV650 (#15, F tier): flagged by 4 of 6 runs. ## Tier meanings - S: Exceptional. Finishes top run after run; capped at 3 slots per category. - A: Excellent. Strongly recommended, beaten only by the very best. - B: Good. A solid choice with real caveats worth knowing. - C: Fair. Acceptable in the right situation, outclassed at its price. - D: Weak. Hard to recommend when better options cost similar money. - F: Avoid. The evidence points you elsewhere. ## How to read this - Each category is researched in four independent runs, one per lens (expert consensus, value, reliability, community pulse). Every run ranks a board of candidates that deliberately includes products buyers cross-shop but should avoid. Placements score on a ranked ladder (LP), and tiers are derived from LP, so no tier is ever assigned by hand. - LP is the product's points on this category's ladder. It is comparable within a category and not across categories. - Outlets is how many distinct outlets are cited for that placement. The per-product page lists each citation, and shows which of their links were fetched and confirmed before publishing. - Nothing is hidden: every product the research placed is on this board.