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Why am i loosing my 4th monitor to DSC?

Teletha
Go to solution Solved by Teletha,

oh it seems it uses 2 ports to aggregate the bandwidth when DSC is turned on. Kinda weird if it already compresses it down to 21Gbps

 

 

 

i have 2 1080p 60hz monitors, and a LG 4K 120hz and the G9 neo at 5120x1440 120hz

When i enable 240Hz on the neo i lose my 4th 1080p monitor, to DSC.

But isn't it still the same bandwidth that is going thru the cable, why does it need to remove the max outputs to only 3 monitors? 

 

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Just now, Teletha said:

But isn't it still the same bandwidth that is going thru the cable, why does it need to remove the max outputs to only 3 monitors? 

 

Some gpus can only give a certain amount of bandwidth on all ports at the same time. This is normal since most gpus can't run ALL the ports at the highest bandwidth. It's annoying but its therew

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Damn this space can fit a 4090 (just kidding)

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but with 120hz the bandwidth is still maxing out the cable at 31.85Gbps so if anything the DSC should make it even lower 

DSC is 3:1 compression so the bandwidth of the display at 240 is 63.7 Gbps and compress it with 3:1 will make it 21.23 Gbps

 

unless dsc is on even at 120hz? then it would be only running 10.61Gbps at 120hz

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6 minutes ago, Teletha said:

but with 120hz the bandwidth is still maxing out the cable at 31.85Gbps so if anything the DSC should make it even lower 

DSC is 3:1 compression so the bandwidth of the display at 240 is 63.7 Gbps and compress it with 3:1 will make it 21.23 Gbps

 

unless dsc is on even at 120hz? then it would be only running 10.61Gbps at 120hz

its weird. Do you have an igpu you can use?

Message me on discord (bread8669) for more help 

 

Current parts list

CPU: R5 5600 CPU Cooler: Stock

Mobo: Asrock B550M-ITX/ac

RAM: Vengeance LPX 2x8GB 3200mhz Cl16

SSD: P5 Plus 500GB Secondary SSD: Kingston A400 960GB

GPU: MSI RTX 3060 Gaming X

Fans: 1x Noctua NF-P12 Redux, 1x Arctic P12, 1x Corsair LL120

PSU: NZXT SP-650M SFX-L PSU from H1

Monitor: Samsung WQHD 34 inch and 43 inch TV

Mouse: Logitech G203

Keyboard: Rii membrane keyboard

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

Damn this space can fit a 4090 (just kidding)

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oh it seems it uses 2 ports to aggregate the bandwidth when DSC is turned on. Kinda weird if it already compresses it down to 21Gbps

 

 

 

AMD Ryzen 7950X3D [x2 360 Rad EKWB] | Asus Extreme x670E | RTX TUF 4090 OC@3GHz [EKWB Block] | Corsair HX1500i | G.Skill Neo CL30 6000MHz (2x32GB) | MP700 2TB Gen5 + 980/950 Pro 1TB M.2 | x6 85PRO 512GB | NAS 4x 18TB Seagate Exo Raid 10+Backblaze | Lian-Li o11D XL | Main Screen: Samsung OLED G9 | AUX: LG IPS7 27" (x2) LG CX 55" G-Sync | Copyright©1996-2024 Teletha All rights reserved. ®

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4 minutes ago, filpo said:

its weird. Do you have an igpu you can use?

ye but the pc gets random black screen with that on sadly 

AMD Ryzen 7950X3D [x2 360 Rad EKWB] | Asus Extreme x670E | RTX TUF 4090 OC@3GHz [EKWB Block] | Corsair HX1500i | G.Skill Neo CL30 6000MHz (2x32GB) | MP700 2TB Gen5 + 980/950 Pro 1TB M.2 | x6 85PRO 512GB | NAS 4x 18TB Seagate Exo Raid 10+Backblaze | Lian-Li o11D XL | Main Screen: Samsung OLED G9 | AUX: LG IPS7 27" (x2) LG CX 55" G-Sync | Copyright©1996-2024 Teletha All rights reserved. ®

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1 minute ago, Teletha said:

oh it seems it uses 2 ports to aggregate the bandwidth when DSC is turned on. Kinda weird if it already compresses it down to 21Gbps

 

 

 

I think you might have to live with the lower refresh rate then or lower the refresh rate/res on the LG 4k 120hz monitor

Message me on discord (bread8669) for more help 

 

Current parts list

CPU: R5 5600 CPU Cooler: Stock

Mobo: Asrock B550M-ITX/ac

RAM: Vengeance LPX 2x8GB 3200mhz Cl16

SSD: P5 Plus 500GB Secondary SSD: Kingston A400 960GB

GPU: MSI RTX 3060 Gaming X

Fans: 1x Noctua NF-P12 Redux, 1x Arctic P12, 1x Corsair LL120

PSU: NZXT SP-650M SFX-L PSU from H1

Monitor: Samsung WQHD 34 inch and 43 inch TV

Mouse: Logitech G203

Keyboard: Rii membrane keyboard

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

Damn this space can fit a 4090 (just kidding)

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6 minutes ago, filpo said:

I think you might have to live with the lower refresh rate then or lower the refresh rate/res on the LG 4k 120hz monitor

i tried lowering everything apart from the 240hz but it wont enable the extra port its hardlocked if dsc is active it seems. 

AMD Ryzen 7950X3D [x2 360 Rad EKWB] | Asus Extreme x670E | RTX TUF 4090 OC@3GHz [EKWB Block] | Corsair HX1500i | G.Skill Neo CL30 6000MHz (2x32GB) | MP700 2TB Gen5 + 980/950 Pro 1TB M.2 | x6 85PRO 512GB | NAS 4x 18TB Seagate Exo Raid 10+Backblaze | Lian-Li o11D XL | Main Screen: Samsung OLED G9 | AUX: LG IPS7 27" (x2) LG CX 55" G-Sync | Copyright©1996-2024 Teletha All rights reserved. ®

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4 minutes ago, Teletha said:

i tried lowering everything apart from the 240hz but it wont enable the extra port its hardlocked if dsc is active it seems. 

Try turning it off then 

Message me on discord (bread8669) for more help 

 

Current parts list

CPU: R5 5600 CPU Cooler: Stock

Mobo: Asrock B550M-ITX/ac

RAM: Vengeance LPX 2x8GB 3200mhz Cl16

SSD: P5 Plus 500GB Secondary SSD: Kingston A400 960GB

GPU: MSI RTX 3060 Gaming X

Fans: 1x Noctua NF-P12 Redux, 1x Arctic P12, 1x Corsair LL120

PSU: NZXT SP-650M SFX-L PSU from H1

Monitor: Samsung WQHD 34 inch and 43 inch TV

Mouse: Logitech G203

Keyboard: Rii membrane keyboard

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

Damn this space can fit a 4090 (just kidding)

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27 minutes ago, Teletha said:

oh it seems it uses 2 ports to aggregate the bandwidth when DSC is turned on. Kinda weird if it already compresses it down to 21Gbps

 

 

 

It's a pixel rate limitation (i.e. before the compression is applied), the final transmission bit rate is not the issue.

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8 minutes ago, Glenwing said:

It's a pixel rate limitation (i.e. before the compression is applied), the final transmission bit rate is not the issue.

Do you think this will have the same issue on DP 2.1 on the 5000 series nvidia gpus too?  Since i will have to upgrade in that case so i can get DP 2.1 without needing to use DSC so i can ultimately have 4 monitors. 

 

since the bandwidth is 63.7Gbps without DSC it has extra 17Gbps headroom but not sure if that applies to the pixel rate too

AMD Ryzen 7950X3D [x2 360 Rad EKWB] | Asus Extreme x670E | RTX TUF 4090 OC@3GHz [EKWB Block] | Corsair HX1500i | G.Skill Neo CL30 6000MHz (2x32GB) | MP700 2TB Gen5 + 980/950 Pro 1TB M.2 | x6 85PRO 512GB | NAS 4x 18TB Seagate Exo Raid 10+Backblaze | Lian-Li o11D XL | Main Screen: Samsung OLED G9 | AUX: LG IPS7 27" (x2) LG CX 55" G-Sync | Copyright©1996-2024 Teletha All rights reserved. ®

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5 minutes ago, Teletha said:

Do you think this will have the same issue on DP 2.1 on the 5000 series nvidia gpus too?  Since i will have to upgrade in that case so i can get DP 2.1 without needing to use DSC so i can ultimately have 4 monitors. 

You are facing the similar issue as mine, I can only said GPU is the limitation as of now.

 

I lost 3rd monitor when I make my Neo G8 and Neo G9 both running at 240hz.

 

Is it RTX 3080 limitation or Samsung Odyssey monitor issue. Hmm... - Displays - Linus Tech Tips

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Monitor: Samsung Odyssey OLED G9 49" 5120x1440 240hz QD-OLED HDR, LG OLED Flex 42LX3QPSA 41.5" 3840x2160 bendable 120hz WOLED, LG UltraGear Gaming Monitor 34" 34GN850 3440x1440 144hz (160hz OC) NanoIPS HDR, LG Ultrawide Gaming Monitor 34" 34UC79G 2560x1080 144hz IPS SDR, LG 24MK600 24" 1920x1080 75hz Freesync IPS SDR, BenQ EW2440ZH 24" 1920x1080 75hz VA SDR.


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2 minutes ago, Andrewtst said:

You are facing the similar issue as mine, I can only said GPU is the limitation as of now.

 

I lost 3rd monitor when I make my Neo G8 and Neo G9 both running at 240hz.

 

Is it RTX 3080 limitation or Samsung Odyssey monitor issue. Hmm... - Displays - Linus Tech Tips

ye that 4k 240hz is at 71.66 Gbps even more that the neo haha. well 2 DSC monitors turns off 2 ports so you only have those 2 that are active. 

Im hoping that the new msi Oled 49" has DP 2.1 so i can replace the neo and wait for the 5000 nvidia gpu for the DP2.1 hopefully it wont need DSC for the pixel rate limit. 

AMD Ryzen 7950X3D [x2 360 Rad EKWB] | Asus Extreme x670E | RTX TUF 4090 OC@3GHz [EKWB Block] | Corsair HX1500i | G.Skill Neo CL30 6000MHz (2x32GB) | MP700 2TB Gen5 + 980/950 Pro 1TB M.2 | x6 85PRO 512GB | NAS 4x 18TB Seagate Exo Raid 10+Backblaze | Lian-Li o11D XL | Main Screen: Samsung OLED G9 | AUX: LG IPS7 27" (x2) LG CX 55" G-Sync | Copyright©1996-2024 Teletha All rights reserved. ®

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3 minutes ago, Teletha said:

ye that 4k 240hz is at 71.66 Gbps even more that the neo haha. well 2 DSC monitors turns off 2 ports so you only have those 2 that are active. 

Im hoping that the new msi Oled 49" has DP 2.1 so i can replace the neo and wait for the 5000 nvidia gpu for the DP2.1 hopefully it wont need DSC for the pixel rate limit. 

Yup, the only thing now is waiting for RTX 5000 series and hope it came with DP 2.1 and I believe it will since 7900 XTX already came with DP 2.1, and also need change new monitor that is DP 2.1 support as well.

PC: AMD Ryzen 9 5900X, Gigabyte GeForce RTX 4090 OC 24G, X570 AORUS Elite WIFI Motherboard, HyperX FURY 32GB DDR4-3200 RGB RAM, Creative Sound Blaster AE-9 Sound Card, Samsung 970 Evo Plus M.2 SATA 500GB, ADATA XPG SX8200 Pro M.2 SATA 2TB, Asus HyperX Fury RGB SSD 960GB, Seagate Barracuda 7200RPM 3.5 HDD 2TB, Cooler Master MASTERLIQUID ML240R ARGB, Cooler Master MASTERFAN MF120R ARGB, Cooler Master ELV8 Graphics Card Holder ARGB, Asus ROG Strix 1000G PSU, Lian Li LANCOOL II MESH RGB Case, Windows 11 Pro (22H2).


Laptop: Asus Vivobook "A Bathing Ape" - ASUS Vivobook S 15 OLED BAPE Edition: Intel i9-13900H, 16 GB RAM, 15.6" 2.8K 120hz OLED | Apple MacBook Pro 14" 2023: M2 Pro, 16 GB RAM, NVMe 512 GB | Asus VivoBook 15 OLED: Intel® Core™ i3-1125G4, Intel UHD, 8 GB RAM, Micron NVMe 512 GB | Illegear Z5 SKYLAKE: Intel Core i7-6700HQ, Nvidia Geforce GTX 970M, 16 GB RAM, ADATA SU800 M.2 SATA 512GB.

 

Monitor: Samsung Odyssey OLED G9 49" 5120x1440 240hz QD-OLED HDR, LG OLED Flex 42LX3QPSA 41.5" 3840x2160 bendable 120hz WOLED, LG UltraGear Gaming Monitor 34" 34GN850 3440x1440 144hz (160hz OC) NanoIPS HDR, LG Ultrawide Gaming Monitor 34" 34UC79G 2560x1080 144hz IPS SDR, LG 24MK600 24" 1920x1080 75hz Freesync IPS SDR, BenQ EW2440ZH 24" 1920x1080 75hz VA SDR.


Input Device: Asus ROG Azoth Wireless Mechanical KeyboardAsus ROG Chakram X Origin Wireless MouseLogitech G913 Lightspeed Wireless RGB Mechanical Gaming Keyboard, Logitech G502X Wireless Mouse, Logitech G903 Lightspeed HERO Wireless Gaming Mouse, Logitech Pro X, Logitech MX Keys, Logitech MX Master 3, XBOX Wireless Controller Covert Forces Edition, Corsair K70 RAPIDFIRE Mechanical Gaming Keyboard, Corsair Dark Core RGB Pro SE Wireless Gaming Mouse, Logitech MK850 Wireless Keyboard & Mouse Combos.


Entertainment: LG 55" C9 OLED HDR Smart UHD TV with AI ThinQ®, 65" Samsung AU7000 4K UHD Smart TV, SONOS Beam (Gen 2) Dolby Atmos Soundbar, SONOS Sub Mini, SONOS Era 100 x2, SONOS Era 300 Dolby Atmos, Logitech G560 2.1 USB & Bluetooth Speaker, Logitech Z625 2.1 THX Speaker, Edifier M1370BT 2.1 Bluetooth Speaker, LG SK9Y 5.1.2 channel Dolby Atmos, Hi-Res Audio SoundBar, SONOS ACE, Technics AZ80, Technics A800E, Sony MDR-Z1R, Bang & Olufsen Beoplay EX, Sony WF-1000XM5, Sony WH-1000XM5, Sony WH-1000XM4, Apple AirPods MAX, Apple AirPods Pro 2, Samsung Galaxy Buds2, Nvidia Shield TV Pro (2019 edition), Apple TV 4K (2017 & 2021 Edition), Chromecast with Google TV, Sony UBP-X700 UltraHD Blu-ray, Panasonic DMP-UB400 UltraHD Blu-ray.

 

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1 minute ago, Andrewtst said:

Yup, the only thing now is waiting for RTX 5000 series and hope it came with DP 2.1 and I believe it will since 7900 XTX already came with DP 2.1

ye they 100% need to have it. so many high-end monitors coming out now 

AMD Ryzen 7950X3D [x2 360 Rad EKWB] | Asus Extreme x670E | RTX TUF 4090 OC@3GHz [EKWB Block] | Corsair HX1500i | G.Skill Neo CL30 6000MHz (2x32GB) | MP700 2TB Gen5 + 980/950 Pro 1TB M.2 | x6 85PRO 512GB | NAS 4x 18TB Seagate Exo Raid 10+Backblaze | Lian-Li o11D XL | Main Screen: Samsung OLED G9 | AUX: LG IPS7 27" (x2) LG CX 55" G-Sync | Copyright©1996-2024 Teletha All rights reserved. ®

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