Difference between FPS & Hz? And why 120Hz is a must for VR?

What?are?the?differences?between?FPS&Hz？

What Is Frame Rate?

Frame rate is an attribute of the graphics card and the CPU. This means your frame rate depends on the power of your GPU and CPU and not necessarily your monitor. Video is a collection of still pictures (frames) in motion.

FPS, on the other hand, is the unit of measurement of the frame rate of a GPU, and it tells you how many frames per second the GPU is capable of processing and pushing out. Therefore, if your GPU can capture/process more images in one second, then it will produce a more detailed video or picture than one that captures less.

What Is Refresh Rate?

Refresh rate is a feature associated with your monitor. Basically, the refresh rate determines the speed at which the monitor displays each frame coming from the CPU or GPU. The higher the refresh rate of your monitor, the smoother and less laggy the videos and images displayed will appear.

So, assuming you have a 120 FPS GPU, and then you connect it to two VR headsets, say one has a refresh rate of 120Hz or higher and the second one has a refresh rate of 70 Hz. The headset with the higher refresh rate (120Hz or more) is going to pick up all the 120 frames produced by the GPU and then display them quicker. The headset with the 70Hz refresh rate will only pick up 70 frames and also, it will display these frames more slowly, causing a lag.

Frame Rate (FPS) is determined by the GPU, Refresh Rate (Hz) is determined by the monitor.

How Can High Refresh Rates be good for VR?

A recent study concluded that 120fps is the "important threshold" to avoid VR sickness for most people.

What causes VR motion sickness?

VR sickness is generally caused by a mismatch in signals triggered by the VR environment sent to the brain from the users's eyes and inner ear. The discrepancy in sensory cues is what leads to adverse symptoms, including nausea, dizziness and discomfort.

There is also research to support the theory that the following factors can cause VR motion sickness:

• Hardware——Flaws in optics, tracking, rendering, and other core tech can also make people feel sick.
• Content——Many people feel sick when moving in VR, such as through thumbstick locomotion, while not moving in real life. especially in first person shooting games.

120Hz becomes a standard feature to minimize motion sickness

DPVR E4 120Hz refresh rate effectively improves the visual frame rate of the info being sent to your eyeballs. Reducing lag, increasing image stability, and helping to maintain the illusion that you’re really there in the virtual world. And eventually helping with motion sickness.

DPVR gaming headset E4 is available on：

DPVR Official https://bit.ly/3MsR8Rx

Amazon https://bit.ly/3QEwH6E

Discord https://discord.com/invite/PujqG93wRp