Complete Guide to Nvidia Looks To Further Eradicate Motion Blur With New G-sync...

"With Pulsar, you get the motion clarity of a theoretical 1,000 Hz monitor as if you're rendering at 1,000 fps."

Nvidia showed off its original version of G-Sync Pulsar motion blur reduction technology two years ago at CES 2024. At first it was only going to be available for monitors with the proprietary G-Sync module installed, but this later opened up to all G-Sync monitors using one of MediaTek's scaler chips.

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Now, two years after its initial announcement, Nvidia has announced an update to the tech which should mean more blur reduction. Oh, and there are actually monitors supporting the tech, now.Perceived motion blur on a monitor, to simplify a little, is essentially caused by the perception that pixels are still hanging around in their previous position after they've moved on to their new spot. That's not really what's happening, of course. This can either be caused by a a slow pixel transition to a new value, or it can be caused by our eyes still holding on to the previous frame for a little too long after the image has changed.

Pulsar attempts to use backlight strobing to solve this problem, and the original version essentially turns off the backlight between each displayed frame. This backlight strobing will be familiar to those of you who know about Ultra-Low Motion Blur, but Pulsar tailors this ULMB strobing to match variable refresh rates, thus the G-Sync identifier. Making the strobing match your monitor's variable refresh rate is supposed to help prevent perceived flickering.

So far so good, but what's new? Well, apart from some tangential 'Ambient Adaptive' technology that adjusts your monitor's brightness and colour based on your room's ambient lighting, the big change is how the new Pulsar does its strobing. The new version doesn't actually strobe the entire backlight. Instead, it strobes just a horizontal strip at the point of the 'scanout'.

When your monitor refreshes to display a new frame, it actually does this a row at a time, rolling down your screen. The new G-Sync Pulsar uses "Regional Backlight Pulsing" to "pulse" (ie, strobe) the backlight at the row where the pixels are about to change—there are ten "backlight stripes", ie, rows, that can be strobed. Think of it like a wave, rolling down your screen, flowing just ahead of where y

Source: PC Gamer