While the lucky owners of PlayStation 5 continue to give it to us with the new generation games, enjoying the very fast loading times, the improved graphics and the unique features of the DualSense, some specialized realities are putting the console under pressure by analyzing every single technical aspect.
From the heads of the YouTube channel HDTVTest comes a new indiscretion: analyzing the output of HDMI 2.1 on PlayStation 5 they found that the maximum peak of the bandwidth is fixed at 32 Gbps, a value lower than the 40 Gbps guaranteed by Xbox Series X and the theoretical maximum of the technology which corresponds to 48 Gbps (without compression). The 32 Gbps limit on PlayStation 5 it was recorded at both 4K resolution at 60fps and 4K at 120fps.
Due to limited bandwidth, therefore, PlayStation 5 is unable to achieve full 4: 4: 4 RGB color sampling in 120Hz mode in 4K HDR, thus stopping at 4: 2: 2, a ratio characterized by a 50% loss of color information compared to 4: 4: 4. The additional 8 Gbps offered by the HDMi 2.1 standard on Xbox Series X is capable of generating a full 4: 4: 4 sample.
What does all this entail? Due to 4: 2: 2 sampling, color space in 4K HDR games at 120 fps is limited and finer details can appear blurry. The problem currently affects a limited number of players: 4K 120Hz panels are not yet widespread and games that can support this display mode are still few. It is true, in any case, that this is an unexpected limitation. It is currently unclear whether this is a hardware or software limit: in the second case, a PlayStation 5 firmware update would be enough to increase the bandwidth, as will happen for the Variable Refresh Rate, which will be added to PS5 with a system update.