Best GPU for 700W and 750W Power Supply

rtx 4090 gpu and streight-power- 1 psu

Let’s dive in and see what are the best graphics cards (in terms of performance) that pair with 700W and 750W PSUs. Choosing the ideal GPU for your power supply is crucial to ensure optimal performance and avoid any potential issues.

In the setup you build, we’ll assume you’re working with a reasonable amount of hardware, including a single GPU, CPU (65W – 125W), SSD, NVMe drive, and two sticks of RAM, all without the flashy RGB distractions and beefy RAID setups.

Keep in mind that overlooking your system with the PSU/GPU combo we suggest is not an option. This can lead to subpar performance or even potential damage to your components.

If you have 700W PSU, GPUs such as the RX 7900 XTX and the RTX 4080 would be excellent choices. These cards offer impressive performance while remaining within the power capabilities of your PSU.

Additionally, if you’re aiming even higher and have a 750W PSU at your disposal, the mighty RTX 4090 is the way to go.

However, it’s crucial to prioritize a PSU from a reputable manufacturer that can consistently deliver reliable power, with the majority of it being supplied on the 12V rail. Don’t skimp on quality, as investing in a high-quality PSU ensures stability, longevity, and optimal performance for your entire system.

power supply with multi 12v rails

be quiet! Straight Power 11 Gold -750W multi-rail power supply

Disclaimer: This article focuses on determining the best GPU for a 750W power supply unit (PSU) for individuals who already possess such a PSU and are curious about the most powerful GPU they can run with it. However, for those who are building a new system or considering a PSU upgrade, it is highly recommended to purchase a PSU with a bit of headroom. This entails opting for a PSU with approximately 100 Watts more capacity for the GPUs suggested in this article.

Most powerful GPUs that will work with 700W and 750W power supply :

  • RX 7900 XTX – 700W
  • RTX 4080 – 700W
  • RTX 3090 – 750W
  • RTX 4090 – 750W


AMD’s RX 7900 XTX is one of the models suitable for 700 Watts.

Let’s talk about the specs and then some pros and cons.

This beast was released on September 24th, 2020, as part of the GeForce 30 generation. It’s built on the Ampere architecture and features the GA102 GPU variant. With a die size of 628 mm² and 28,300 million transistors, this thing packs a punch! It’s manufactured using Samsung’s 8 nm process, which results in a density of 45.1M/mm².

Now, let’s get into the nitty-gritty. The RX 7900 XTX boasts 10496 shading units, 328 TMUs, and 112 ROPs. It has a base clock of 1395 MHz and a boost clock of 1695 MHz, delivering some serious power. The memory clock runs at 1219 MHz (19.5 Gbps effective) and the card is equipped with 24 GB of GDDR6X memory on a 384-bit bus, giving it a whopping bandwidth of 936.2 GB/s.

In terms of dimensions, this card requires a triple-slot design. It measures 336 mm in length, 140 mm in width, and 61 mm in height. So make sure you’ve got enough space in your rig for this beast!

When it comes to power requirements, the RX 7900 XTX has a TDP of 350 W, so it’s recommended to pair it with a 750 W power supply unit but works with 700W also.

Connectivity-wise, you’ve got 1x HDMI 2.1 and 3x DisplayPort 1.4a ports, allowing you to hook up multiple displays for an immersive gaming or productivity experience.

In terms of performance, the RX 7900 XTX is a beast. It offers a pixel rate of 189.8 GPixel/s and a texture rate of 556.0 GTexel/s, ensuring smooth visuals and crisp textures in your favorite games. It has excellent rasterization performance and is built for high-end gaming and graphics-intensive tasks, so you can expect top-notch performance.

Game FPS 1080p FPS 1440p FPS 4K
Shadow of the Tomb Raider 291 201 99
Cyberpunk 2077 143 133 84
Hogwarts Legacy 152 117 81
The Last of Us Part I 117 88 46


  • The 7900 XTX offers excellent rasterization performance and is even cheaper than the RTX 4080 in some cases.
  • The power draw of around 350 Watts is decent, representing a significant improvement over previous AMD cards.
  • While AMD falls behind in ray tracing performance, it has made significant strides in closing the gap over the years.
  • The 7900 XTX is a solid option for non-ray traced gaming and offers competitive performance against the RTX 4080.
  • Available at MSRP price or bellow


  • AMD’s power management on the board could use some improvement.
  • AMD still needs to work on its mid-range offerings as there is a lack of affordable options in the market.
  • The RTX 4090 remains uncontested at the high end, giving Nvidia an advantage in that segment.
  • Performance at 8K wasn’t impressive.


The RTX 4080, part of the GeForce 40 series, is a high-performance graphics card based on the Ada Lovelace architecture.

Released in September 2022, it features 16 GB of GDDR6X memory, a 5 nm manufacturing process, and 45,900 million transistors. With its powerful specifications, including 9728 shading units, 304 TMUs, and 112 ROPs, the RTX 4080 delivers impressive theoretical performance, offering 48.74 TFLOPS of FP32 floating-point performance. It comes in a triple-slot design and supports features like DirectX 12 Ultimate and Vulkan 1.3. The RTX 4080 has a TDP of 320 W and launched at a price of $1,199 USD.

In the power consumption department RTX 4080 is notably good, as demonstrated in various games. In Dying Light 2, it reaches a total system usage of 404 Watts, comparable to the 3070 TI and 6800 XT, making it very manageable.

In Doom Eternal, power usage slightly increased to 471 Watts, situating the 4080 between the 3080 and 3090, but still reducing total system usage by 22% compared to the 4090. Similarly, in Hitman 3, power usage remains lower than the 3090 and comparable to the 3080.

When locking the frame rate at 90 FPS, the power efficiency of the RTX 4080 becomes evident, using approximately half the power of the RTX 3090 TI under the same operating conditions, showcasing its impressive efficiency.

Game FPS 1080p FPS 1440p FPS 4K
Shadow of the Tomb Raider 278 198 113
Cyberpunk 2077 140 131 86
Hogwarts Legacy 150 115 81
The Last of Us Part I 115 87 46


  • RTX 4080 offers about 70-75% performance of the RTX 4090 at a lower price point (75% of the price).
  • RTX 4090 leads by an average of 30-40% over the RTX 4080 in most scenarios.
  • In certain games like Final Fantasy and Total War at 4K, the 4080 outperforms the RX 6950 XT by a significant margin.
  • Impressive engineering from Nvidia, resulting in excellent performance.


  • Disappointing pricing, especially with the 4090 falling into the expensive Titan-class category.
  • In the current market 4080’s value proposition falls short, not living up to expectations.


The RTX 30 series graphics card, based on the Ampere architecture, features the GA102 GPU variant and was released on September 1st, 2020.

It offers a significant upgrade over the previous generation, with 10496 shading units, 82 SMs, and 328 Tensor Cores and RT Cores, providing improved rendering capabilities.

The card comes with 24 GB of GDDR6X memory and a 384-bit memory bus, offering a bandwidth of 936.2 GB/s. With a base clock of 1395 MHz and a boost clock of 1695 MHz, it delivers a theoretical performance of 35.58 TFLOPS in FP32. The card requires a TDP of 350 W and is recommended to be paired with a 750 W power supply. It features triple-slot cooling and measures 336 mm in length, 140 mm in width, and 61 mm in height.

Connectivity options include 1x HDMI 2.1 and 3x DisplayPort 1.4a outputs. The power connectors include a 12-pin connector. The RTX 30 series offers DirectX 12 Ultimate support and is designed for high-performance gaming and demanding workloads.

Game FPS 1080p FPS 1440p FPS 4K
Shadow of the Tomb Raider 213 152 87
Cyberpunk 2077 107 100 66
Hogwarts Legacy 119 92 64
The Last of Us Part I 92 69 36


  • Offers a significant performance boost over the previous-generation RTX 2080 Ti, with around a 30% improvement in most games.
  • Provides 24 GB of VRAM, making it suitable for workloads that require a large memory buffer.
  • Offers impressive 8K gaming performance when combined with DLSS (Deep Learning Super Sampling) support.
  • Provides a lower-priced alternative to the Titan RTX with similar VRAM capacity.


  • Limited performance gains over the RTX 3080 in gaming, with single-digit to low double-digit percentage improvements.
  • 8K gaming performance is heavily reliant on DLSS support, and true native 8K gaming is challenging without it.
  • The RTX 3090 is considered less exciting for gamers, as the value proposition is not as compelling compared to the RTX 3080.
  • The price of the RTX 3090 may not justify the marginal performance gains it offers, especially for gamers.

AMD RTX 4090

The RTX 4090 is a powerful graphics card featuring the AD102 GPU variant based on the Ada Lovelace architecture.

Manufactured by TSMC using a 5 nm process, it packs 76,300 million transistors into a die size of 609 mm². With a release date in September 2022, it belongs to the GeForce 40 generation and serves as the successor to the GeForce 30 series. Priced at $1,599, it offers impressive clock speeds with a base clock of 2235 MHz and a boost clock of 2520 MHz. It boasts 24 GB of GDDR6X memory with a bandwidth of 1,008 GB/s.

The RTX 4090 exhibits a TDP of 450 W and requires a suggested PSU of 850 W for optimal performance. It comes with a triple-slot board design, measuring 304 mm in length, 137 mm in width, and 61 mm in height. The RTX 4090 graphics card features 1x HDMI 2.1 output and 3x DisplayPort 1.4a outputs. It requires 1x 16-pin power connector for proper operation.

A few words about RTX 4090’s power efficiency.

The power consumption of the RTX 4090 is found to be quite efficient compared to other flagship graphics cards.

When playing Halo at 1440p, the RTX 4090 delivers 50% more performance than the RTX 3090 while using less power. Both the RTX 4090 and RTX 3090 TI have a TDP of 450 watts, but the system power consumption for the RTX 3090 can be slightly higher.

However, overall, the RTX 4090’s power consumption falls within the expected range for flagship GPUs. When comparing power efficiency at a locked frame rate of 90fps, the RTX 4090 consumes just 215 watts from the wall, while the RTX 3090 TI requires 93% more power and the 6950 XT consumes 40% more power for the same level of performance.

Despite its reputation as a powerful and potentially power-hungry card, the RTX 4090 impresses with its power efficiency.

Game FPS 1080p FPS 1440p FPS 4K
Shadow of the Tomb Raider 321 228 131
Cyberpunk 2077 161 151 99
Hogwarts Legacy 173 133 83
The Last of Us Part I 133 101 53


  • The GeForce RTX 4090 offers exceptional performance, being incredibly fast and delivering a high refresh rate gaming experience at 4K without compromising on visuals.
  • Ray tracing is a carefree option, and DLSS 3.0 enhances gaming experiences.
  • The power consumption of the RTX 4090 is not as extreme as rumored, using slightly less power than the 3090 TI and offering performance comparable to other flagship products.
  • Under full load, the founders edition model runs quietly, similar to a quality mid-range graphics card.


  • The price of the RTX 4090 is a real concern, being considerably expensive which may deter potential buyers.
  • Value analysis suggests that the 4090 is not a great value product compared to the 3080, as it offers similar performance at a significantly higher cost per frame.
Allan Witt

Allan Witt

Allan Witt is Co-founder and editor in chief of Computers and the web have fascinated me since I was a child. In 2011 started training as an IT specialist in a medium-sized company and started a blog at the same time. I really enjoy blogging about tech. After successfully completing my training, I worked as a system administrator in the same company for two years. As a part-time job I started tinkering with pre-build PCs and building custom gaming rigs at local hardware shop. The desire to build PCs full-time grew stronger, and now this is my full time job.


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