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If you need a 750W power supply, you probably own or plan to build, a beast of a gaming PC that consumes lots of power. Getting one of these will allow you to upgrade to almost any CPU and GPU without needing a new, more powerful PSU. 750W PSUs are also great for builds based on server CPUs or for mid-range workstations. Most power supplies won’t be able to power high-end gaming & productivity builds, so if you plan on building one, we recommend you pick one of the options listed below. There aren’t as many 750W power supplies on the market as there are 650W models, but there is a good amount of choice in this power tier.
Our list of the best 700W and 750W power supplies includes a couple of budget gems. We also have a number of quality mid-range models, as well as a selection of high-end models for those who don’t care about the price. As is the case with 600W and 650W power supplies, 750W models are way more popular with manufacturers than 700W units. The only 700W model we have on this list is the Seasonic Prime FANLESS TX-700. As for the 50W difference, well, it isn’t large. Remember, a quality 700W PSU is always a better choice than a cheap 750W PSU that features less reliable components.
Before you dive into our list of the best 700W & 750W PSUs, do check out our guides for the best RTX 3080 graphics cards as well as for the best CPUs for RTX 3080 builds. If you want to combine a monster CPU and GPU, but don’t know whether your current PSU will be able to provide enough power, you could read our guide on CPU and GPU undervolting. It’s better to reduce the power used by your components and see if your current unit will handle it than to buy a new power supply.
Best 700W and 750W power supplies – budget picks
Let’s start with the budget price bracket. These PSUs are selling for less than $100 and give lots for the price. They have solid performance but come without advanced features such as fully modular design or top-of-the-line internal components.
If you need a cheap 750W power supply that won’t fry your PC a few weeks after the purchase, get the Thermaltake Smart BX1 RGB 750W. This is a very affordable PSU that comes without a modular design. On the flip side, this unit offers excellent performance for the price. The main point of differentiation from the rest of the pack is RGB. Don’t worry; you can turn it off.
The PSU has quality components and excellent efficiency. It comes close to the 80 Plus Gold standard even though this one’s rated as an 80 Plus Bronze PSU. Load regulation is pretty good, and ripple suppression is okay. Not great, but also not a deal-breaker.
Finally, the Smart BX1 RGB 750W doesn’t have a semi-passive mode, but it’s pretty quiet. You get a 5-year warranty period, which is pretty good for a budget power supply. Overall, this is a great budget 750W PSU that performs and looks great.
2. Corsair CX750M: Best semi-modular budget 750W PSU
The CX750M from Corsair is the best budget power supply in the 700-750W tier. The main selling point of this model isn’t RGB effects but superb performance. Load regulation and ripple control are superb, with only small issues with load regulation when testing in a hot environment. This model is also quite efficient, just in line with its 80 Plus Bronze certificate. The 3-year warranty period isn’t great, but it’s okay for a budget model.
The budget CX-m series from Corsair operates great under high temperatures, and while this PSU doesn’t offer semi-passive mode, it’s pretty quiet even when under heavy load. Overall, this is another excellent budget power supply that offers lots for the money. It’s a bit more expensive than the Thermaltake Smart BX1, but here you’ve got the semi-modular design. It can be handy for those who like clean builds without unnecessary cables.
Best 700W and 750W power supplies – mid-range picks
Our mid-range picks are the best choices for those who want relatively affordable PSUs that offer superb performance, great efficiency, and modular design. They aren’t super expensive while coming quite close to the performance of high-end models.
3. Corsair RM750x: Best mid-range 750W power supply
The mid-range RMx series from Corsair is a perfect pick in the 750W category. The Corsair RM750x has it all and is the best mid-range 750W PSU you can get. The performance is superb, and the unit is very efficient, with pretty good load regulation and superb ripple suppression results. The operating temperature is also pretty low.
This allows the PSU to be completely silent up until about 600W load. The semi-passive mode works up until 150W load, but the fan doesn’t reach 20dB(A) until the 600W mark. This makes the RM750x virtually inaudible. Even when the load is at 750W, the fan noise is below 30dB(A), which is an impressive result.
When it comes to the warranty period, you get 10 years, which is more than enough. Overall, this is a superb mid-range 750W power supply that has all you need to build a high-end system.
4. Seasonic Focus Plus 750: Best alternative mid-range 750W PSU
If you prefer Seasonic over Corsair or cannot find the RM750x, get the Seasonic Focus Plus 750. This is another superb 750W PSU that has all you need for building a powerful PC. The unit comes with the 80 Plus Gold certificate and a fully modular design. It has superb performance and efficiency in line with its 80 Plus certificate.
Load regulation is a bit better than the RM750x, and ripple suppression is in line with our other mid-range pick. Semi-passive mode turns on at about the 200W mark, and from then on, the PSU is practically silent up until the 600W load. On max loads, it can be a bit noisy but not enough for the noise to become a deal-breaker. If you want total silence in the mid-range category, the RM750x is a better choice.
When it comes to operating temperatures, this PSU works great no matter the ambient conditions. Finally, the 10-year warranty is another plus. Overall, the Seasonic FOCUS Plus 750 Gold SSR-750FX is another superb mid-range 750W PSU that packs enough power for most high-end gaming PCs.
Best 700W and 750W power supplies – high-end picks
The two high-end picks are some of the best power supplies you can get on the market. They sport the best internal components and offer mythical performance and top-tier results when it comes to efficiency, noise, and working temperatures. These are expensive, and we don’t recommend them for most users because our mid-range choices will be more than enough for almost any kind of PC build. But if you want the best and don’t care about the price, check these two out.
The Corsair HX750i is a terrific PSU and the best 80Plus Platinum 750W power supply you can get. This PSU is extremely efficient, in line with the 80 Plus Platinum certification. But that’s not all. With the Corsair HX750i, you get the best possible internal components as well as superb performance.
Load regulation and ripple suppression results are impressive, and the semi-passive mode turns on when the load is above 300W. This means that below 300W, this PSU is completely silent. Once it gets under heavy load, it can reach almost 30dB(A); pretty good considering 30 decibels is almost inaudible.
Corsair offers a 10-year warranty for this particular model, which is excellent news for all buyers. Overall, this is a top choice for system builders who want excellent performance and silent performance.
6. Seasonic Prime 750W Titanium: Best 750W PSU overall
This is the best 750W power supply on the market. Everything about the Seasonic Prime 750W Titanium is impressive. Performance, efficiency, working temperatures, load regulation, ripple suppression results, internal components, you name it.
Yes, it’s the most expensive 750W model on the market, at least when it comes to consumer-grade PSUs, but it offers the best possible performance available at the moment. It also comes with a 12-year warranty, which is a sweet, sweet cherry on the cake.
SFX PSUs, designed for Mini-ITX builds, have come a long way. Today, these small units can deliver incredible amounts of power, mostly thanks to the increase in popularity of small form factor builds in recent years. If you need a 750W SFX power supply, get the Corsair SF750 Platinum.
It sells for a premium price, but it does come with a superb performance. Efficiency is in line with the 80 Plus Platinum certificate. Load regulation is extremely tight, and ripple suppression is pretty good but not best in class.
The semi-passive mode works up until 300W load, and after that, the PSU is virtually inaudible even under extreme loads. The same can be said about working temperatures. They are pretty low across the board.
Overall, this is an impressive SFX PSU that comes with amazing performance and a 7-year warranty period. If you’re looking for an SFF case to pair with this PSU, check out our list of the best Mini-ITX cases.
8. Seasonic Prime Fanless TX-700: Best 700W passive PSU
Passive power supplies are usually made of top-tier components, but they aren’t very powerful. This is because the higher the power, the hotter the PSU gets under load. Seasonic, however, has somehow managed to come up with a 700W PSU that operates without a fan, the Seasonic Prime Fanless TX-700. The TX-700 is the best passive power supply you can get, period.
And it is an amazing piece of engineering. Now, there aren’t official reviews of this model yet, but if its 600W younger brother is anything to go by, you should expect top-of-the-line results in every category. Also, you get a 12-year warranty, which is always a huge plus.
The only downside is the price, which is well over the pricing of our high-end 750W PSU picks. But, if you cherish silence above everything else, have the money, and want to build a high-end PC, this is the best passive PSU on the market. This model would be a perfect match with one of the best quiet PC cases.