DisplayPort 1.2 Cable 5 metres +

[carl]

I see a few long length (5m or longer) DP cables or HDMI to DP cables advertised as capable for 3840 x 2160 @ 60Hz but not much mention of higher refresh rates. I see the odd comment on the internet that 2160p 60Hz cables should have enough bandwidth to perform at higher refresh rates for lower resolutions but no solid confirmation. Can anyone enlighten me?

My problem is am looking at potential monitor purchases for 2560 x 1440 @ 165Hz such as the Asus ROG Swift PG278QR and Acer XB271 but I would like to know if I can use the monitor at it's full capabilities even if it's connected to a PC at the other side of the room.

https://www.overclockers.co.uk/asus-pg278qr-rog-swift-27-2560x1440-tn-g-sync-165hz-gaming-widescreen-led-slim-bezel-monitor-blac-mo-099-as.html

https://uk.pcpartpicker.com/product/ttnG3C/acer-monitor-xb271hubmiprz

If the DP cable is a no go then what about HDMI? I already have a 7.5m long HDMI 2.0 cable which I know works for 2160p@60Hz with my TV. The monitors I looked at have DP 1.2 and HDMI 1.4 ports. Would plugging in the HDMI 2.0 cable work for 100Hz or higher? I also have a DP/HDMI convertor cable. A stab in the dark for me but my PC really needs to sit next to the monitor?

Thanks.

[Bad 💀 Motha]

Under 50 feet for those and you shouldn't have any degradation in signal quality.
Avoid HDMI like the plague, use DP
Avoid any adapter stuff; use straight cables of the correct/latest specs

[Azza ☠]

G-SYNC requires DisplayPort to run.

There is some bandwidth lost over 3 meters, but no signal lost of quality till after 5 meters. However, bandwidth of DisplayPort 1.3 is much greater than HTML 2.0.

You will probably want "HBR2" certified (High Bit Rate 2) for 21.6 Gbit/s bandwidth.

DP 1.2 bandwidth = 17.28 Gbit/s

1440 x 2560 x 144 x 32 = 16,986,931,200 bits per second (16.98 Gbit/s)

But for 165 Hz we get 19,464,192,000 bits per second (which is over DP 1.2 bandwidth).

DisplayPort Versions:
1.0–1.1a = 8.64 Gbit/s (1440p @ 165 Hz = NO)
1.2–1.2a = 17.28 Gbit/s (1440p @ 165 Hz = YES - SEMI)
1.3 = 25.92 Gbit/s (1440p @ 165 Hz = YES)
1.4 = 25.92 Gbit/s (1440p @ 165 Hz = YES)

[Washell]

Originally posted by Azza ☠:

DP 1.2 bandwidth = 17.28 Gbit/s

1440 x 2560 x 144 x 32 = 16,986,931,200 bits per second (16.98 Gbit/s)

But for 165 Hz we get 19,464,192,000 bits per second (which is over DP 1.2 bandwidth).

Both displays only go upto 24 bit, which mean it "only" gets up to 16.30 Gbit/s for 1440x2560x165x24. They'd be rather silly after all if they made a display with specs that can't be serviced by the connectors they'd put on it. ;)

[Azza ☠]

Originally posted by Washell:

Originally posted by Azza ☠:

DP 1.2 bandwidth = 17.28 Gbit/s

1440 x 2560 x 144 x 32 = 16,986,931,200 bits per second (16.98 Gbit/s)

But for 165 Hz we get 19,464,192,000 bits per second (which is over DP 1.2 bandwidth).

Both displays only go upto 24 bit, which mean it "only" gets up to 16.30 Gbit/s for 1440x2560x165x24. They'd be rather silly after all if they made a display with specs that can't be serviced by the connectors they'd put on it. ;)

Thanks for the correction, I knew something was off.

[vadim]

Originally posted by carl borsuk:

However, bandwidth of DisplayPort 1.3 is much greater than HTML 2.0.

I agree, HTML 2.0 pretty obsolete nowadays: https://tools.ietf.org/html/rfc1866

[Azza ☠]

Originally posted by vadim:

Originally posted by carl borsuk:

However, bandwidth of DisplayPort 1.3 is much greater than HTML 2.0.

I agree, HTML 2.0 pretty obsolete nowadays: https://tools.ietf.org/html/rfc1866

Haha, I gotta stop using these discussion forums early morning here.

HDMI 2.0, I meant, not HTML (brain auto-correct)

[carl]

Thanks guys.

I found this interesting

https://www.displayport.org/cables/how-to-choose-a-displayport-cable-and-not-get-a-bad-one/

[Cathulhu]

Also, avoid those cables that claim that gold plating results in a better image quality. Utterly moronic male cow excrement with a digital signal.

[Azza ☠]

Originally posted by Cathulhu:

Also, avoid those cables that claim that gold plating results in a better image quality. Utterly moronic male cow excrement with a digital signal.

Pff, don't be a fool!

That only works with HDMI and if diamond:
https://www.amazon.com/AudioQuest-Diamond-feet-Braided-Cable/dp/B003CT08E4

It's a steal! (only $1000 NZD per meter)

[tacoshy]

uhm my HDMI 2.0b hasa bandwidth of 18.5Gbit/sec and it performs just fine for 4K + HDR. Really always depends on the cable version you are using.

And HDMI 2.1 supports up to 34.8Gbit/s

[carl]

As a follow up for anyone who cares I can attest the cable below works for 2560x1440 @ 144Hz on the Acer XB271HU monitor. My 7.5m HDMI 2.0 cable does 60Hz maximum for all resolutions though that could be a monitor issue. Does 2160p @ 60Hz on my UHD Sony Bravia TV.

https://www.scan.co.uk/products/4m-club3d-displayport-14-hbr3-cable-male-male