I found this:
HTC are selling a dp optical cable of 20 meters working with vive. It other supports 4K and 144hz. Could it works? As I know fiber cable with DisplayPort don’t lose signal and works incredible well.
The price is good too.
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Thanks for your information.
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I guess the problem with this cable is that when you use it - youll get distracted to much.
Regular cables are already an issue. Cant really imagine playing a game with a cable on the floor that breaks easily and cost around hundert bux.
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Well… you know, you can retract it a little hehe I only want 2 meters more… but if I have 10 meters to go to another room, that’s ok
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I need a 5 meter extension (for a total of 10m from PC) to keep my current room-scale setup which is next to the room where my PC is located, but it doesn’t really matter if the extension is not exactly heavy duty as the cable will not be moved.
It/they (USB + DP extension cables) will stay in place and the only cable being moved around between seated and room-scale play area will be the actual Pimax-supplied cable.
I.e. for seated gaming the pimax-supplied/headset mounted cable will just go from the extension cables back to the PC, and when playing room-scale, they will go the other way (I don’t want to plug/unplug them constantly).
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Could a specialized link box be used instead of a cable for extending distance?
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I would think yes.
With the right chip(s) repeating the signals (and power delivered) a repeater box should work. Theoretically… 
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I guess the main problem with those cables will be the coupling to the HMD cable.
I can only see male/male fiber cables but no real extension cables with female port for the headset…
Most signal loss you got with port to port couplers, i even doubt there are any certified for 8k DP 1.4 
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Well… that’s true the adapter loses a 10% of total signal. But if you have 0% loss in the cable, then you can use a lot of adapters without problems.
Actually, I have 30 meters of HDMI with two adapters female to male, and 4 cables, 2 optical of 10m, and 4K 3D HDR to my tv.
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I remember reading something that the cable with active signal improvement add latency… but can’t remember where or if it’s large enough to be a problem.
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That would be an issue, if noticeable, just as it would be for a wireless solution… 
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Can you maybe link us your Coupler with just 10% loss?
I dont find any 1.4 certified ones at all ;(
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It’s for HDMI hehehe. But HTC Vive Pro now has one new adapter and converter with 0% signal loss to DisplayPort and 20 meters of cable
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Can you post a link of this 20m Vive pro DP extension then?
Don’t get me wrong but this is all no solution for 8kx unless we got a fiber extension cable with female end or a DP 1.4 coupler 
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Oh… yes… but don’t scream when you see the price 
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If they can extend display port and usb 3.0 for 20 meters and using a secondary adapter for mini display port to display port…
Then extend 8Kx 2 meters is absolutely possible. But you need an optical cable. And 10 meters I think it possible too. And it’s possible that with the extremely expensive HTC Vive 20 meters package you can achieve this length too for the 8Kx haha.
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mhm again just a Displayport to Displayport cable…
Aaah I see, so they’re extending the Vive Link box, that’s why they also need a mini-Displayport to Displayport dongle in the package.
But this wont help us with the Pimax again, as the output of the link box is not Displayport but a Vive connector
So back to start, either an optical cable with female DP Port or an DP 1.4 coupler adapter
Yes, I was searching for a real extension cable, but I only find manufactures who create it on demand. But definitely it works. The problem is the price and somebody has to buy more than 100 cables haha.
The cable has a price of 40$ for 5 meters and 0 signal loss for this distance. Then extend 8Kx is “easy” technically but difficult to acquire.
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Could any of these Signal Boosters be of any use? NB: They’re DP 1.2, not DP 1.4.
I don’t know if it’s the same for DP, but with an expensive HDMI Signal Booster, I’m able to run a 4K HDR Projector with a 13m HDMI cable run (PC 5m HDMI out → AV Amp->8m HDMI out to projector). Without the booster, I got constant picture loss and green horizontal lines. A booster fixed it.
Extends True 4K signal transmission up to 5 m
Compliant with DisplayPort 1.2a and HDCP 2.2
Superior video quality – up to True 4K resolutions of 4096 x 2160 @ 60 Hz (4:4:4)
Supports HDR
Cascade 3 levels to extend True 4K signal up to 20 m
https://www.kramerav.com/Product/612R/T
Supports 4K@60 (4:4:4) resolution up to 656 feet (200 meters) on a dual LC multi−mode fiber cable.
POWER 5V: Via USB source, external source, or DisplayPort PIN #20
Compliant with DisplayPort™ v1.2 specifications.
Max. Resolution — 4096x2160@60Hz.
Max. Data Rate — 21.6Gbps (5.4Gbps per lane).
Supports Dual–mode DP (DP++).
Max. Extension — 656ft (200m) over dual LC multi–mode OM3 fiber optic cable.
Supports Auxiliary /l²C channel over fiber.
Compact Design — For easy plug and play installations.
Pure fiber connectivity for secure applications.
RECOMMENDED CABLE:
Structure: Dual Multi–mode OM3 (50/125um) glass fiber
Optical Connectors: Duplex LC connectors
Max. Fiber Cable Attenuation (λ=850nm): 2.5dB/KM
Max. Skew: 0.4ns
Max. Insertion Attenuation: 0.5dB
Total Optical Attenuation: 1dB max @ 656ft/200m extension
Maximum Length: 200m (656ft)
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I think the issue with extensions/boosters could be increased latency?
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