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Don't Game on Display Port if monitor is 10Bit+, game on HDMI?
 

Don't Game on Display Port if monitor is 10Bit+, game on HDMI?  

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(@gareth_rees)
Eminent Member
Joined: 6 months ago
 

Clearly Intel is lying though with their numbers otherwise PCI-E scaling wouldn't have been shown when affecting 2080 Ti @ TechPowerUP.

But I do see that it would be advantageous for eGPU users to stick to 8-bit color by using HDMI 2.0 instead of DisplayPort 1.4

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Ray
 Ray
(@ray)
Eminent Member
Joined: 2 years ago
 

What I want to know is, when are we going to see the benefits of PCIe Gen4 on Thunderbolt? I think it's high time Intel updated the standard and released Thunderbolt 4.

I'm hoping that it would work under PCIe Gen4 and thus have 80 gb/s over 4 lanes. I can dream and hope that they use Gen4 AND manage to add 2 or 4 lanes, giving us a total of 120-160 gb/s, but I doubt they'll do that. In either case, it would be a huge improvement. Suddenly eGPU enclosures wouldn't bottleneck the GPUs anymore. Doing things like have a proper dock system with some drives would be feasible. Having 2 cards in one enclosure both at 4 lanes would be feasible. 

The amount of time Thunderbolt 3's been around exceeds that of TB2 and TB1, so I'm holding on to hope for a not-too-distant release of TB4.

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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joevt
(@joevt)
Honorable Member
Joined: 2 years ago
 
Posted by: Gareth Rees

Clearly Intel is lying though with their numbers otherwise PCI-E scaling wouldn't have been shown when affecting 2080 Ti @ TechPowerUP.

But I do see that it would be advantageous for eGPU users to stick to 8-bit color by using HDMI 2.0 instead of DisplayPort 1.4

What numbers? What PCI-E scaling? Post some URLs so we can understand what you are talking about.

DisplayPort supports all the color depths that HDMI does. Changing cables is not the way to change color depth. Use the graphics card control panel or game settings.

What kind of game tries to send complete frames over PCIe? Is this some situation where you want to capture video at full frame rate and resolution (for streaming - but usually this is done at a reduced frame rate and resolution, isn't it)? Is this for playing a game using a display connected to a different graphics card? Why would you do that?

Posted by: Ray

What I want to know is, when are we going to see the benefits of PCIe Gen4 on Thunderbolt? I think it's high time Intel updated the standard and released Thunderbolt 4.

I'm hoping that it would work under PCIe Gen4 and thus have 80 gb/s over 4 lanes. I can dream and hope that they use Gen4 AND manage to add 2 or 4 lanes, giving us a total of 120-160 gb/s, but I doubt they'll do that. In either case, it would be a huge improvement. Suddenly eGPU enclosures wouldn't bottleneck the GPUs anymore. Doing things like have a proper dock system with some drives would be feasible. Having 2 cards in one enclosure both at 4 lanes would be feasible. 

The amount of time Thunderbolt 3's been around exceeds that of TB2 and TB1, so I'm holding on to hope for a not-too-distant release of TB4.

Thunderbolt 4 won't happen until we've had USB4 for awhile. USB-C cables have room for only one extra lane, 3 lanes in each direction total, but this requires a new cable. Any more lanes than that requires a new connector unless some other pins in the USB-C connector can be repurposed (need 4 pins per bidirectional lane - maybe remove Power Delivery capability?). Current Thunderbolt 3 is 20 Gbps per lane max (same as the new DisplayPort 2.0). This is a little more than PCIe 4.0 (16 GT/s). PCIe 5.0 is much greater (32 GT/s). Maybe multiple cables could be used depending on how much bandwidth you want (similar to PCIe expansion boxes that let you choose between x8 and x16).

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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