list from toms hardware (its the most recent I could find, the rest are from 2015). also the tier numbers are different depending on which site its coming from (some sites have up to tier 7)
http://www.tomshardware.com/forum/id-2547993/psu-tier-list.htmlTier OneThe highest quality and most stable Power Supply Units available. Protected by industrial grade protection circuitry and can output wattage at a rated maximum temperature of 50°C or below. These units are also Haswell certified, meaning they can cope with the C6 and C7 sleep states of 0.05Amps without triggering the under-current protection switch. May even go over labelled wattage and still work until it safely shuts down.
Tier TwoAs above, just slightly lower quality. Still safe to use and are all stable for any PC of today's standards, including Haswell C Stepping certification. Recommended for those on a fairly limited budget.
Tier ThreeStill safe to use and stable, just lower quality components. Not really ideal in serious overclocking or super-high load situations, such as a Bitcoin mining rig or a high end gaming system.
Tier FourBuilt down to a low price. Not exactly the most stable units ever created. Very basic safety circuitry or even thin gauge wiring used. Not for gaming rigs or overclocking systems of any kind. Avoid unless your budget dictates your choice.
Tier FiveAvoid IMMEDIATELY. These units are highly unsafe to use. No such protections added, very thin gauge wiring used, false advertising and too much to list. Reference to a higher tiered unit for a better, money saving and a much safer unit. For your safety's sake, please don't order or pick one up for use in your system. These units are a potential fire hazard and could even kill you, let alone your system.
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Tier one
Antec High Current Pro Platinum Delta Electronics
Be Quiet Dark Power Pro P10 / 850w FSP (550w - 750w) / Seasonic (850w - 1200w)
Dark Power Pro P11 850w FSP
Corsair AX / AXi series 760w - 1200w Seasonic (AX) / Flextronics (AXi)
AX1500i Flextronics
HXi Channel Well Technology
RMi Channel Well Technology
RM1000x Channel Well Technology
Cooler Master V series / V series 1200w Seasonic
EVGASuperNova G2 / P2 / T2 Super Flower
Supernova GS Seasonic
Supernova GQ FSP
Supernova PS Seasonic
Enermax DigiFanless 500w Channel Well Technology
Firepower Silencer MK3 1200w Super Flower
FSP Aurum PT FSP
Hydro G FSP
LEPA G1600 Enermax
SeasonicPlatinum series Seasonic
Snow Silent 1050w Seasonic
X series / X series XM2 Seasonic
Silverstone Nightjar Platinum 520w Seasonic
Super Flower Leadex Gold / Platinum / Titanium Super Flower
Golden King Super Flower
Golden Silent / 430w Super Flower
ThermaltakeToughPower DPS-G RGB 1250w Channel Well Technology
Toughpower DPS-G Platinum 1050w Enhance Electronics
XFXPro series Black edition Seasonic
Pro series Black edition Limited Edition 1000w Seasonic
Pro series XXX / Semi-Modular Seasonic
XTS Fanless Seasonic