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How to Choose the Best Graphics Card for Your Gaming PC

Do gaming PCs come with graphics card?

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How to Choose the Best Graphics Card for Your Gaming PC

If you’re considering buying, building or upgrading a ORDINATEUR de jeux, one of the most important considerations is processor speed. Of course, you want a CPU that's able to handle the intense resource requirements of today's game titles.

But equally if not more important is the graphics card, or GPU. So, what is GPU? It stands for graphics processing unit. But more importantly, what does a GPU do? The GPU is what actually renders the gaming environment you see on your monitor. Without a powerful enough graphics card for PC gaming your favorite game might stutter, freeze, or fail to load at all.

But with dozens of graphics card models on the market, which is the best GPU? Or the right one for you? Let's see if we can unpack that question.

The Brands Making Graphics Cards

When it comes to a graphics card for PC gaming there are two main players: AMD and NVIDIA. Chipmaker Intel also plans to release its own discrete graphics card, but when that will happen isn't known. Currently, Intel GPU options are mostly limited to integrated graphics, which aren't recommended for attempting to run today's top games.

Both AMD and NVIDIA have different naming conventions for their graphics card lines, making it difficult (but not impossible) to make comparisons.

AMD currently markets their AMD GPU line under the model name Radeon, with two main product lines: its RX 6000 Series and Radeon GraphicsTM. RX graphics are higher-end models that are suitable for running today's top games. Radeon Graphics, on the other hand, are integrated graphics that are less suitable for high-end gaming and commonly found on affordable laptop offerings. For the numbers that follow, the first is the generation number and the rest is the ranking that AMD has given the card in comparison to others in the same line. For example, the RX 6900 XT offers higher performance than the RX 6700 XT. The XT indicates higher performance than a card lacking that designation.

The names of NVIDIA's graphics cards can be equally confusing. The company, which markets its NVIDIA GPU cards under the brand name GeForce, currently has two naming schemes, GTX and RTX.

GTX is NVIDIA’s standard line, whereas RTX cards include dedicated hardware to run the company’s RTX suite of gaming features that enhance features such as lighting, reflections and shadows in supported games as well as a crisper image and improved FPS, or frames per second.

Either GTX or RTX will be followed by four numbers. The first two indicate the generation, while the second two indicate the card's relative ranking compared with similar models. The RTX 3080, for example, offers better performance than the RTX 3060.

Some cards also include a "TI" designation following the numbers, indicating an improvement over the non-TI (but not as good as a card with a higher number). A card with a designation of 3070 TI, for example, is better than a 3070 but not as good as a 3080.

So, at this point you might be asking which is the best GPU for gaming? Both AMD and NVIDIA make gaming GPU cards that can easily power today's top games, so it may come down to personal preference, price, and specific features of each brands' card offerings. That leads us to the top of specs.

Let’s Talk About Specs

Knowing what model numbers indicate can certainly help in differentiating one graphics card for PC gaming from another and knowing how they're ranked, but to really get a sense of what card is right for your needs, it's important to know a bit about the specifications. Here's a quick rundown:

  • Graphics card memory amount: One of the most important specifications, especially when it comes to playing a game in high resolution or with settings set to maximum. A card with 4GB is the minimum you should consider, and if you're playing a game at 4K resolution you’ll want at least 8 GB.
  • Ports: Make sure the card you’re considering will connect with your monitor. If not, you’ll also have to purchase an adapter or even a new monitor. Newer monitors typically have either HDMI or DisplayPort connectors, while some older units only have DVI.
  • Clock speed: Measured in megahertz (MHz), the clock speed indicates how fast the cores of a graphics card are. The cores render graphics, so the higher the GPU clock speed, the faster the processing. Many games opt for overclocking, or running the card faster than the speed established by the manufacturer. Clock speed is important, but it’s not the only factor affecting card performance.
  • CUDA Cores / Stream Processors: CUDA Cores are parallel processors, similar to how a CPU might be dual- or quad-core. The cores are responsible for processing the data coming in and out of the card. For a meaningful comparison, you need to compare core counts within the same architecture as opposed to different architectures. Comparing core counts between card architecture or brands isn’t a reliable indicator of differences in performance.
  • TFLOPS / GFLOPS: TFLOPS, or trillions of floating-point operations per second, is an indicator of the maximum theoretical performance of a GPU. It may also be expressed as GFLOPS, or billions of FLOPS. TFLOPS is calculated by multiplying the core count by the clock speed and multiplying that by two. Within the same architecture, TFLOPS can indicate how much faster one chip is compared to another.
  • Memory speed / bandwidth: Faster memory can make one card faster than another.
  • RT / Tensor Cores: Typically found on higher-end NVIDIA cards, ray tracing-focused RT cores and machine-learning oriented Tensor Cores are relatively new technologies that improve screen detail. They hold potential but presently have limited game support.

But Will it Fit?

There are few things worse than purchasing the graphics card of your dreams only to find out it doesn't fit in your existing case. It's a critical but often overlooked detail.

When considering upgrading a graphics card for PC gaming, look at the length, height and thickness. Graphics cards typically come in half-height (slim), single-slot, dual-slot or even triple-slot varieties. Most of today's gaming cards are full-height and take up two expansion slots. And if the card has a big heatsink and fan it can block access to an adjacent slot.

In addition, most gaming cards power beyond what is supplied by the slot itself, often via one or more 6- or 8-pin PCIe power connectors that come in varieties. If your power supply doesn't have the right connectors, you'll want to upgrade. Connecting to SATA or Molex connectors via an adapter isn't recommended.

And on that subject, there's one additional game card specification to consider: Thermal Design Power or TDP. Measured in watts, TDP is an indicator of the power consumption of the card under normal use. Depending on the number you may need to upgrade your power supply when adding a new graphics card. In general, a 600W PSU will handle all but the most powerful graphics cards, and 800W is enough for nearly any card even with overclocking.

The Wrapup

When it comes to choosing the right gaming card for your system, Lenovo has done much of the work by offering a section of cards and upgrades for its Legion line of gaming desktops.

If you choose to upgrade your graphics card in the future, Legion gaming ordinateur de bureau models feature a one-press, tool-free upgrade system, for ease of access.

Still unsure of the right card for you? Get advice from other shoppers and owners in Lenovo’s user forums or contact Assistance technique.

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