Unless an RTX 4090 is the crown jewel of your overpowered gaming rig, you shouldn’t need more than a 750W power supply. There are more potent power supplies out there, but our best 750W PSU recommendations already achieve formidable results while being reasonably priced. Check them out and put your system power worries to rest!
Corsair RM750x (2021 Model)
Form factor: ATX12V | Dimensions: 150 x 85 x 160mm | Efficiency: 80+ Gold | Fan diameter: 140mm | Modular: Yes | Rail power: 150W 20A for 3.3 & 5V, 750W 62.5A for 12V, 15W 3A for 5VSB
- Amazing ripple suppression
- Excellent general stats
- Good cable complement
- Short connection distances on Molex cable
The first RM750x arrived to critical acclaim in 2018, but Corsair believed they could do better! Three years later, they came up with an improved version that’s still the best 750W power supply you can get without spending an ungodly amount. It’s quiet and boasts exemplary stats across the board.
Corsair equipped their modular PSU with enough PCIe and EPS cables to power any modern system, provided the GPU isn’t a beast. Length and variety are good. We just wish the spacing on the Molex cable would be wider to accommodate broader fan placement.
The RM750x retains its predecessor’s 80+ Gold cert and remains within the high standard’s boundaries regardless of load. Speaking of, kudos to Corsair for developing one of the world’s most efficient PSUs when handling light loads. Many PCs spend much time idling, so it’s sure to reflect on your annual power budget.
Other metrics are almost as impressive. The RM750x boasts long hold-up times and low inrush current, successfully combatting power grid foibles. Ripple suppression is exceptional, as not even the 12V rail reaches 10mV regardless of wattage. That’s less than 10% of the ATX12V’s acceptable limit!
While not as impressive, the transient response falls well within acceptable limits. The power delivery doesn’t fluctuate much, as voltage regulation is on point, especially for the 5 and 3.3V rails.
The RM750x runs quietly during standard operation, clocking in at less than 30dB. The 140mm magnetic fan can make a ruckus if ambient temperatures are high or you’re stress-testing the system. It won’t cause trouble otherwise.
EVGA SuperNOVA 750 G6
Form factor: ATX12V | Dimensions: 150 x 85 x 140mm | Efficiency: 80+ Gold | Fan diameter: 135mm | Modular: Yes | Rail power: 120W 24A for 3.3 & 5V, 750W 62.5A for 12V, 15W 3A for 5VSB
- Excellent value for the money
- Almost as good as the RM750x in basically every respect
- Long cables, even longer warranty
- Could be more efficient while idling
Our second pick is the best 750W PSU for the money since it’s $20 – $30 cheaper than our winner but only marginally less awesome. The G6 line sees EVGA part ways with Super Flower and go with Seasonic instead, and the change is a positive one.
There are no surprises regarding the PSU’s signature EVGA look and generous cable length. EVGA also reaffirms its exceptional customer service by offering a 10-year warranty. Unsurprisingly, they went with quality parts and dialed the fan curve up to ensure you can power several consecutive rigs before needing a replacement.
The G6 beats our winner in voltage regulation, scoring far below 1% on all rails. We’d have been equally enthused about its transient response values if the 3.3V rail didn’t fluctuate as much as it does. The power supply has no inrush current problems and maintains hold-up times almost as high as the RM750X.
Ripple suppression is outstanding on its own but a bit looser than on our winner. Nuances like these are mostly useful for ranking as both units perform admirably. The G6 maintains its 80+ Gold status throughout everyday and high loads. It comes just short of reaching the desired 70%+ efficiency at loads lower than 2%, though.
Similarities continue with temperatures and fan noise. EVGA uses a smaller fan that spins quicker, but that didn’t adversely impact performance. If anything, you’ll be slightly less able to hear the G6 during normal operation, especially over the hum of fans on components requiring more substantial cooling.
XPG Core Reactor 750 W
Form factor: ATX12V | Dimensions: 150 x 85 x 140mm | Efficiency: 80+ Gold | Fan diameter: 120mm | Modular: Yes | Rail power: 120W 22A for 3.3V, 20A for 5V, 750W 62.5A for 12V, 15W 3A for 5VSB
- Excellent overall performance
- Comes with two EPS cables
- Generous warranty
- Stiff cables make for more challenging management
If you keep up with our hardware lists, you know XPG is a respected storage drive and RAM manufacturer. Their power supply debut is also a hit since the ambitiously named Core Reactor ticks all the boxes for inclusion on our best 750W PSU list. If it were less expensive, it could have risen even higher.
XPG mitigates some of that cost by including a generous 10-year warranty and an ample cable complement. Two EPS cables are among them, which you’ll need for extra stability when powering most high-end motherboards. Length is generally OK, but some wires are thick and rigid, making routing more of a hassle than with other PSUs.
Minor inconveniences like this aside, the Core Reactor is an exemplary model. Ripple suppression and voltage regulation are excellent – even the 3.3V rail behaves nicely throughout the unit’s wattage range.
The transient response would have joined this list of accolades if not for a relatively high deviation on the 3.3V rail. We’re also not thrilled by the inrush current, which almost reaches 90A. Unless you feel the need to flick the power on and off several times per day, this will never become problematic.
The Core Reactor’s 80+ Gold rating is accurate. Its efficiency spikes aren’t as notable as others’, but there are no stark dips, either. Idle efficiency breaches the 70% threshold, which is always nice. Our final praise concerns noise. The Core Reactor is silent, barely passing 20dB at capacity.
Lian Li SP750
Form factor: SFX | Dimensions: 125 x 65 x 100mm | Efficiency: 80+ Gold | Fan diameter: 92mm | Modular: Yes | Rail power: 100W 20A for 3.3 & 5V, 750W 62A for 12V, 12.5W 2.5A for 5VSB
- Excellent for SFF cases
- Good load regulation and overall efficiency
- Very low transient response
- Noisy fan
- Low hold-up time
While they need to be physically smaller, power supplies for small PCs match their full-sized counterparts in all respects. Lian Li makes the best 750W PSU for SFF computers and even ships it as standard with some of their smaller enclosures.
Adherence to the SFX standards means the SP750 and its cables need to be shorter to fit inside cramped spaces. That means 400-500mm is the cable length norm, and you can expect more connectors per cable to minimize their footprint. Lian Li partnered with PSU newcomer Helly to construct the unit, and they did not cheap out on its components.
Along with the GF3, this is the best 750W power supply in terms of efficiency. Its 90%+ results even span a wider wattage range. Load regulation is outstanding on the 12V rail and impresses less with each rail before becoming loose on 5VSB. A minor consideration, but still.
The SP750 shines when it comes to transient response. It’s among the lowest we’ve seen regardless of form factor, meaning the PSU will remain dependable even if it has to frequently supply different power amounts. 12V ripple climbs into the low 30mV range, which is to be expected, given SFX’s limited room for capacitors.
Low hold-up times and high noise are noteworthy concerns. The former means the SP750 isn’t good at dealing with land grid power fluctuations and has a higher shut-down chance in unstable areas. The latter is due to a small fan that spins faster to keep up.
Thermaltake Toughpower GF3 750W
Form factor: ATX12V | Dimensions: 150 x 85 x 160mm | Efficiency: 80+ Gold | Fan diameter: 135mm | Modular: Yes | Rail power: 120W 22A for 3.3 & 5V, 750W 62.5A for 12V, 15W 3A for 5VSB
- Exceeds advertised efficiency
- Compatible with latest NVidia GPUs
- Uses quality components
- High 12V rail ripple
While they’re still perfectly viable, our first two choices were released before NVidia debuted the 12+4-pin 12VHPWR standard for its new power-hungry GPUs. Thermaltake steps up with the Toughpower GF3, the best 750w PSU for early adopters of the ATX12V 3.0 standard.
Thermaltake supplies a good complement of long cables with adequate SATA and Molex connector spacing. Even though the packaging’s marketing blurb claims the PSU is PCIe 5.0 ready, it powers the next generation of high-speed drives as well as any other recent model.
The Toughpower GF3 has a tight handle on voltage regulation, ensuring consistency regardless of power usage at a given time. It’s also more efficient than the 80+ Gold sticker suggests, achieving 91% or even 92% efficiency throughout much of its load. Superlatives continue with idle efficiency, which matches the RM750x’s.
Transient response measurements reveal encouraging results overall, with room for improvement on the 3.3V rail. The GF3 has average inrush current and hold-up results.
Ripple is why this power supply didn’t place higher. Specifically, ripple on the 12V rail climbs into the 35-40mV range at high use. While that’s just a third of the recommended maximum, it’s noticeable compared to tighter competition. It’s not an issue on other rails, however.
Thermaltake uses the same fan supplier as EVGA, so similar results are to be expected. The GF3 has more perforations. These improve cooling but don’t impact noise. You wouldn’t notice it even in a side-by-side comparison, but the GF3 is actually a decibel or two quieter.