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128 Bit vs 64 Bit Video Card | Does 128 Bit Give Better Performance Than 64 Bit?

January 29, 2022 by Jim Eddy

The performance of video cards or graphic cards depends on terms such as bus width, clock speed, and bandwidth. These specifications vary between 128 bit and 64-bit graphic cards, which is something to look out for.

128 Bit Video Card vs 64 Bit

128 Bit vs 64 Bit Video Card – What Should Be Chosen?

Basically, a 128-bit GPU can access twice as much data as a 64 bit, likely enhancing the performance of the video card. But the effective performance of a video card also depends on some other factors. Think of a two-lane road as opposed to a four-lane road for example. Even though both have the same speed limit, one can surely handle a lot more traffic than the other.

Here we will discuss the difference between 128-bit video cards vs 64 bit.

Memory Bus Width

If a video card is 128 bit, it means that the data transferred between GPU and VRAM (video RAM) at one time is 128 bit. Whereas 64-bit video cards can only transfer 64-bit data at a time. The total number of bits a video card can transfer is called bus width.

Memory Speed

On the other hand, the speed of the VRAM is known as memory speed or clock rate. The memory speed of a card doesn’t depend on the bus width. For instance, the clock rate of a 64-bit card can be much higher than a 128-bit card. Moreover, for a specified bus width, the performance of a graphic card is dependent on the clock rate.

Bandwidth 

The performance of video cards mostly depends on their bandwidth. Higher bandwidth gives higher resolution, smoother texture, and better anti-aliasing quality. However, clock rate and bus width directly define the bandwidth of a video card.

Suppose a 64-bit video card has a double clock rate than the 128 bit one. Then the bandwidth which is defined by the number of bus widths multiplied by clock rate will be the same for both cases. 

So you see, a card with only 64 bits can perform as well as a card with 128 bits. But generally, the 64-bit video cards available are very low- end and sometimes even with a high clock rate, it fails to give a good performance. 

RAM Storage 

A greater number of graphics RAM storage won’t necessarily increase the performance of graphic cards but it may be useful while running high-quality videos and games.

Running Games in 128 Bits vs 64 Bits Video Cards

A 64-bit graphic card is not really a good choice for playing games. The present-day games consist of too many object details, so they require a lot of data to move at the same time. Therefore, video cards with higher bus width can run games more spontaneously. 

However, 64-bit cards are not able to run most of the games created in recent times. Whereas, 128-bit cards have a big advantage in this regard. 

To Conclude 

It isn’t necessary that a 128 bits graphic card will always be a better performer than 64 bits one just because its bus width is higher. A high-end 64 bits card may outperform a low-end 128 bits card for its architectural design. However, if both cards have the same specs, then a 128 bits video card will presumably be preferable.

Filed Under: GPU

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