Providing there is a 4k screen which can refresh to 90hz then we can have the same specs as the 5k+ on an 8KX if theres a gpu which can run it in the next few years and better screens.
"… bandwidth of around 64.8 Gbit/s for the next version of DisplayPort. Assuming 8b/10b encoding, this would give a data rate of 51.84 Gbit/s.
This should allow for uncompressed RGB / YCBCR 4:4:4 video formats as high as:
- 8K (7680 × 4320) @ 60 Hz 8 bpc (24 bit/px) or 50 Hz 10 bpc (30 bit/px)
- 5K (5120 × 2880) @ 120 Hz 8 bpc or 100 Hz 10 bpc
- 4K (3840 × 2160) @ 200 Hz 8 bpc or 180 Hz 10 bpc
Higher resolutions/refresh rates should also be possible through the use of DSC (compression) or chroma subsampling (YCBCR 4:2:2 or 4:2:0). Higher uncompressed formats may also be possible if the new version replaces 8b/10b encoding with a more efficient encoding method."
DP 1.5 Cable bandwith limit @ 10 bpc
4k : 3840 × 2160 = 8,294,400 pixels x 180(180hz) = 1,492,992,000 pixels p/s.
5k : 5120 × 2880 = 14,745,600 x 100(100hz) = 1,474,560,000 pixels p/s
Pimax 5k+ required pixel throughput for 90hz (2080ti required for modern rasterized titles)
2560 x 1440 x 2 = 7,372,800 x 90(90hz) = 663,552,000 pixels per second
Pimax 8KX required pixel throughput for 90hz
3840 × 2160 x 2 = 16,588,800 x 90(90hz) = 1,492,992,000 pixels p/s
Pimax 8KX required pixel throughput for 80hz
3840 × 2160 x2 = 16,588,800 x 80(80hz) = 1,327,104,000 pixels p/s
it’s x2 the performance of the 2080ti required to run the 8KX at 80hz in current rasterised titles with the same performance as the 5k+ at 90hz on the 2080ti.
if the 2080ti in SLI gave you 200% stacking gains in performance in all titles, then you could say you can run the 8KX with a SLI setup with the same performance as 5k+ with a single 2080ti.
@Sean.Huang @Matthew.Xu @deletedpimaxrep1 @anon74848233 @Pimax-Support @PimaxVR
8K+ is more feasible of a product than the 8KX when the new 4k full rgb strip screens are available. We simply don’t have the raw GPU power to run the 8KX at 80hz, 60hz is even questionable as my mathematics project a 40hz maximum framerate on the 8KX with a 2080ti in current titles.
But looks like DP 1.5 will be able to provide x2 uncompressed 4k signals with no compromise to colour either. (8bpc gives 256 shades of colour for each pixel vs 1024 shades of colour per pixel for 10bpc)
…insane to think every second of playing on pimax 8KX at 90hz is one and a half trillion pixels generated and 16 million pixels per frame, but even the best gpu to date struggles to deliver a third of that (663 mill/s 7m/frame)… we need over twice the best gpu power that’s commercially available to consumers to run the 8KX using rasterized graphics.
Ray tracing performance
To put things in perspective, real-time ray traced scenes (which actually only ray trace the reflections and shadows in this demo and is a mix of rasterization and ray tracing) at 4k resolution - the 1080ti get 5fps and the 2080ti gets 30fps at 4k.
RTX is still at least 2-3 generations away from semi-ray traced environments being VR capable, as there needs to be x6 more RTX power to reach the 180 average fps required for 90hz @ 4k
for the 5k+ though, 50fps at 1440p in this demo indicates x3.5 more RTX performance than the 2080ti is needed for real-time semi-ray traced scenes at 1440p x2 at 90hz in VR.