5 Best Power Supplies for the RTX 3070 in 2020

The release of the new mid-range king of GPUs – the RTX Ampere 3070 – is just around the corner. After the somewhat questionable release of the RTX Ampere 3080, which sold out in less than 10 seconds, one can only hope that the RTX Ampere 3090 and 3070s will have a bit more availability to meet the high demand.

Particularly, the timing for the release of the RTX 3070 could not be better, as during the start of the same month AMD will announce their new Ryzen Zen3 4000 series CPUs. If we also take into account the fact that DDR4 RAM has reached its peak in both performance and cost-efficiency, there has never been a better time to build a new setup.

Why choose a good PSU for the RTX 3070?

So, what are the best components to pair with the new RTX Ampere 3070? Firstly, anything in the Intel 10th generation i5 to i7 range, or AMD Ryzen 5 and above, should more than suffice to avoid throttling the GPU; while we also suggest a Noctua NH-D15 CPU cooler to keep your CPU’s temperatures low. The other key component to ensure high framerates and performance is the memory. For any new build featuring the RTX Ampere 3070, we would recommend a set of dual-channel, 16GB and above, 3200 MHz of C14, or 3600 MHz of C16, RAM – the latter speeds are better for those that won’t make use of overclocking. For those that do look forward to overclocking their GPU and RAM, a good case and case-fans are crucial for keeping the temperatures manageable. It’s hard to go wrong with Fractal cases and Noctua case-fans, which are both great for accomplishing this task.

Lest we forget, the heart of the PC build, the PSU. The power supply is what pumps the appropriate amount of electricity throughout all the internal hardware components, and is therefore crucial for avoiding unnecessary shutdowns and stuttering, all the way to actual electrical damage. Now, Nvidia has stated that they recommend a 650W PSU for the RTX Ampere 3070, but that should be the minimum recommended wattage. Going slightly higher (but not too high) keeps the PSU at low to medium loads, which is where the PSU performs at its peak efficiency (loads that are too high or too low will negatively impact the efficiency).

Other aspects that need to be taken into account include the level of cable allowed by the PSU (whether or not it is modular), how much noise the fan makes, its cooling ability, the quality of the fan’s bearings, the capacitors, and, of course, its efficiency.

80 PLUS Efficiency Ratings

In order to ensure that consumers receive the exact specifications advertised by the manufacturer – as well as to hold a high standard when it comes to energy efficiency for computers – 80 PLUS provides a certification for any PSU that performs at 80% efficiency and above.

In order to achieve this rating, PSUs are tested in a room temperature setting, and if they achieve an efficiency above 80%, then they will attain a special 80 PLUS classification. These classifications begin with the Bronze rating, for efficiencies of 82%-85%, Silver for 85%-88%, Gold for 87%-90%, Platinum for 89%-92%, and Titanium for 90%-94% (all values pertain to 115V internal non-redundant). Now, of course, the higher the efficiency that the PSU is able to achieve the better, as higher percentages translate to a more environmentally friendly PC, lower electricity bills, and less heat being transferred to other hardware components (the energy lost during conversion is heated, which can negatively impact the hardware inside your case).

The sweet spot between efficiency ratings and price is usually found within the Gold to Platinum range, though even a Bronze PSU can be okay if the PC is not meant to be used too often. Titanium rated PSUs can also justify their price if the PC is used for several hours a day – especially at high loads.

Taking efficiency into account, as well as all the other aforementioned power supply aspects, we have compiled a list of the four best PSUs available to pair with the GeForce RTX Ampere 3070 – separated into the best budget PSU, the best RGB PSU, the best silent PSU, and the best SFX Platinum rated PSU, which is also the option to go for those looking to build a small form factor (SFF) PC.

Best Budget PSU for RTX 3070


If you intend to use your PC on a casual basis, then a Bronze rated PSU will suffice and save you some initial cost. The best power supply to fulfill this role is EVGA’s 750BQ, which provides great quality and value at a low price.

In terms of how much power it can supply, this PSU has a single +12V rail that can output up to 62 amps, or 744 watts; which is more than enough for any +12V rail dependent hardware. The cables that transfer this electricity are separated into two categories: the essential cables, and the peripheral cables. Due to the semi-modular nature of the EVGA 750BQ, the essential cables are integrated, yet the peripheral cables are detachable – so you can attach and remove them depending on your needs. The integrated cables are sleeved, while the peripheral cables are flat black. To protect your hardware from any potential damage, this PSU has under-voltage protection, over current protection, overpower protection, and short circuit protection.

Next, when it comes to cooling, the EVGA 750BQ has a large, 140mm, fan which has Teflon nano steel ball bearings that EVGA states offers better longevity and less noise emissions when compared to standard ball bearings. The noise levels of this PSU can reach relatively high levels, ranging from 35 to 40 dB when the fan is actually spinning. With EVGA’s Intelligent Auto Fan technology, this will not always be the case, as the fan will only spin when the PSU is under mid to high loads, meaning that when it is under low loads it will be inaudible.  The PSU itself is rated to last 100,000 hours on average (MTBF), and this is backed up with a five-year limited warranty.

The price for the EVGA 750BQ will vary depending on its availability, as it’s currently selling for $117.25, but can be found for as low as $90-$95 when on sale.

Best gold-rated power supply for the RTX 3070

Corsair RM750x

Corsair RM750x 80 Plus Gold

Corsair has always been a giant in the PSU manufacturing industry, as they have set a standard in regards to performance and reliability with their wide range of power supplies that can be utilized for personal, to strictly professional, use. Their higher-end consumer-grade model is the RMx – which is not to be confused with the RM, as the RMx has higher quality components and will usually cost slightly more.

The 80 PLUS Gold-rated RM750x has a single +12V rail that can output up to 62.5 amps, or 750 watts – and does so with an efficiency level up to %90. Integrated within it are industrial-grade, all Japanese capacitors from Nippon Chemi-Con and Nichicon; rated for temperatures up to 105 degrees Celsius. This PSU is fully modular, meaning that all cables can be removed and attached depending on your needs, so there will be no unnecessary cables that have to be crammed within the case. Of these cables, the essentials ones are sleeved, and the peripheral cables are simply flat black.

Corsair has included their own-built 135mm fan for the RM750x, which makes use of rifle bearings that emit low noise and which have an increased level of durability in comparison to both sleeve bearings and regular ball bearings. Under low to medium loads the fan will not spin, so the PSU will remain silent, while under mid to high loads, Corsair makes the rather bold claim that, the fan will only reach noise levels of 20-22 decibels. If that is the case, it will be virtually inaudible at all times. The PSU and its fan are rated to last for 100,000 hours on average, and this is backed up by a, rather impressive, 10-year warranty.

The Corsair RM750x is currently selling for only $134.99, which is an excellent price given its power output, 80 PLUS Gold level efficiency, and overall quality of internal components.

Best RGB-enabled Power Supply for RTX 3070

Thermaltake Toughpower iRGB Plus

Thermaltake Toughpower iRGB Plus 750W

 Buying the RTX 3070 means that you are probably, at least to some capacity, a gaming enthusiast, so why not add a bit of extra RGB flair to your setup? Thermaltake’s iRGB illuminated Toughpower Plus offers style, without sacrificing quality and efficiency, and does so at a respectable price. 18 addressable LEDs capable of displaying 16.8 million colors, with Thermaltake’s patented Riing Duo design, are situated onto the PSU’s fan and offer a host of interchangeable effects that can be synchronized to your liking via PC software, a mobile application, and even Amazon’s Alexa voice controls! In fact, if you are a fan of Razer peripherals, this PSU can even by synced with Razer’s Chroma.

The Toughpower Plus has a single +12V rail that can supply up to 62.5 amps (or 750 watts) to your RTX 3070 and CPU, so you don’t have to worry about an insufficient power supply. All capacitors within are high quality, 105 degree Celsius certified, and are manufactured in Japan. The PSU is fully modular, with all cables being detachable, and the essential cables are individually sleeved while the peripheral cables are just flat black.

The 140mm fan included, which is RGB lit, is situated onto an anti-vibration mounting system, and, surprisingly enough, comes with bearings of the highest quality you can find in PSUs: hydro-dynamic bearings. These bearings are the most silent (second only to magnetic levitation bearings, not usually found in PSUs) and allow for Thermaltake to rate this PSU with a MTBF of 120,000 hours; backing it up with a 10-year warranty.

The downside of this PSU is its excessive amount of software, which many users have found to be dysfunctional, to the point of ultimately hurting their experience with the product. If this software is to be ignored, the Toughpower Plus has top-quality components, an 80 PLUS Gold rated efficiency, and can be found at the $175 range – an overall great price for both style and function.

Best Silent Power Supply for RTX 3070

Be Quiet! Straight Power 11

be quiet Straight Power 11

If you would rather trade the RGB lighting displays for some peace and quiet, then it is hard to find a better choice than the company focused on creating products with, particularly low noise outputs: The Listen GmbH brand has created, perhaps, the quietest PSU available in the market: Their 80 PLUS Platinum-rated Straight Power 11.

This power supply has a unique design with multiple +12V rails. These rails, four in number, are separated into two pairs: one pair outputting 20 amps each, the other pair outputting 24 amps each for a total of 84 amps and a maximum power output of 820 watts. The capacitors within are all 105 degree C certified and Japanese manufactured, whilew the other internal components are all designed to be wire free in order to keep thermals low. The Straight Power 11 is also fully modular, and all the cables are fully sleeved.

The 135mm fan included is of equally high quality to its internal components, as it has be quiet!’s Silent Wings 3 technology – which is marketing’s way of stating that it has custom, static pressure optimized fan blades, fluid dynamic bearings, and a 6-pole fan motor. These three aspects translate to an overall operating noise level that ranges from 8.6, to only 20.8 decibels for loads ranging from 1-100%. That means that no matter what load the PSU is under, it will be virtually silent from less than a foot away.

Given the quality components and the Platinum 80 PLUS rating, you would expect this PSU to cost upwards of $200. Surprisingly enough, it is currently selling for only $149.90; making it an excellent deal to pair with the RTX 3070, for an overall PC build that operates silently.

Best SFX SFF PSU for RTX 3070

corsair sf750

Since the RTX Ampere 3070 will have a 2, to 2.2, slot heatsink, while being under 250mm in length (depending on the aftermarket model) it should easily fit into several of the more popular, fully-sized GPU compatible, small form factor (SFF) cases. If you’re looking for a PC that is small in footprint, but great in power, then the RTX Ampere 3070, and the mITX motherboard within, will need an SFX PSU to power it. For that, Corsair has you covered with their SF750. Note that, due to the cramming of hardware in such a small case, thermals may quickly become a problem that can also negatively influence the efficiency of the PSU. This is why we have chosen the SF750 which has a Platinum 80 PLUS rating, to compensate for this discrepancy.

This SF750 has a single +12V rail that can output 62.5 amps or 750 watts. Crucial for SFF cases, this model is fully modular and has flexible paracord sleeves for each individual cable. The capacitors within are all high-quality, Japanese manufactured capacitors. Also, if at some point you would rather transfer the SF750 onto a full-ATX rig, an SFX-to-ATX bracket is also included.

The cooling fan used in the SF750 is 92mm in diameter, and will not operate at low to medium loads. Like the RM750x, this PSU also has rifle bearings – which are great, but not the best. They still do allow for an MTBF of 100,000 hours, which is backed by a respectable 7-year warranty.

Due to its impressive specifications, despite its small size, the SF750 can be difficult to find. Its price usually ranges around the $185 mark; though the price will ultimately depend on its availability.

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