Question USB 3.1(1) with DP 1.2, but can it also do DP 1.4 (since 3.1(1) = 40gbit/s)?

[aschoneveld]

My laptop product specs: "USB 3.1 Type-C Gen 1 Data Transfer up to 5 Gb/s, DisplayPort™ 1.2, Power delivery"
It doesn't list DP 1.4 but since it looks like 1.4 uses less than 5gb/s, it should work right?

also
The Philips monitor i'm looking at says it has DP 10.8 Gbps/s, does this mean it is 10.8 gigabits per second per second which is 1.35 gigabytes per second per second? Maybe with every refresh the bitrate is 10.8gigabits(bandwidth), so for 144hz it is 144x10.8? I didn't think 10.8gbps/s would support 1440 144hz any way you look at it.

This sucked.

also
Is 8+2 bit really mind-bending like advertisers want us to believe?
Would you trade a 3k:1 144hz 100%NTSC for 1.2k:1 8+2bit 75hz 90%NTSC/Adobe ( essentially half the contrast, half the refresh rate, slightly costlier but 5x colour gradient) (VA~IPS)?

 

[kerberos_20]

DP is wired from GPU, if its listed as 1.2, then it is what it is

 

[kerberos_20]

also
The Philips monitor i'm looking at says it has DP 10.8 Gbps/s, does this mean it is 10.8 gigabits per second per second which is 1.35 gigabytes per second per second? Maybe with every refresh the bitrate is 10.8gigabits(bandwidth), so for 144hz it is 144x10.8? I didn't think 10.8gbps/s would support 1440 144hz any way you look at it.

(H + Hblank) × (V + Vblank) × C × F

Where:

• H is the horizonal pixel count
• V is the vertical pixel count
• C is the color depth in bits per pixel
• F is the refresh frequency in Hz
• Hblank and Vblank are the timing parameters, obtained from a standards document or set by the manufacturer.

This result is compared to the data rate of a video interface (not to be confused with the bandwidth).

For example, for 3840 × 2160 @ 60 Hz 8 bpc RGB color:

• H = 3840 px
• V = 2160 px
• C = 24 bit/px (8 bits per channel × 3 channels: R, G, and B)
• F = 60 Hz
• Hblank = 560 (obtained from CTA-861 standard)
• Vblank = 90 (obtained from CTA-861 standard)

Required data rate = (3840 + 560) × (2160 + 90) × 24 × 60

= 4400 × 2250 × 24 × 60
= 14,256,000,000 bit/s
= 14.26 Gbit/s

here is example on how to calculate bandwith

 

[aschoneveld]

DP is wired from GPU, if its listed as 1.2, then it is what it is

Thanks, seems obvious now. Philips doesnt share vblank h... so annoying, will have to contact them.

 

[Glenwing]

USB 5 Gbit/s data rate is not relevant here.

DP 1.2 maximum data rate is 17.28 Gbit/s. You can research the maximum limits here: https://linustechtips.com/topic/729...s-v2/?section=calc&mode=maxfreq&H=1920&V=1080