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I recently purchased an HP Z1 G9 PC (i7-13700, with integrated INTEL 770 UHD graphics). The PC type in detail is:
Model: HP Z1 G9 Tower Desktop PC (5F7Y5ES)
Product: 5F7Y5ES
The PC has 2 DP ports and one HDMI for managing up to 3 displays simultaneously (and in principle I saw that this works).
The problem I encounter is that, via the HDMI connection I am unable to set the resolution 3840 x 2160. I have tried with various HiSpeed cables including HDMI 2.0 but neither on the AOC 4k monitor (U2790B) nor on the Samsung OLED TV QE65S95BATXZT (QBQ905) I own, I can set this resolution via HDMI, the maximum possible (and recommended on the GUI) resolution is 1980 x 1080 60Hz / 8bit with HDR (lowering the frequency, even to 10bit) even exploring all the modes offered by the graphics card. Note that:
1. On the AOC monitor, which also has a DP port, using a DP-DP cable, I was able to set the resolution 3840 x 2160 60Hz;
2. On the Samsung TV, with the same cables, but other devices (a Dell PC with a Nvidia Card, Firestick, Android Box) the resolution 3840 x 2160 60Hz (with HDR also enabled), works;
3. I also tried using a pair of DP - HDMI HiSpeed cables (therefore using a DP port of the aforementioned PC) but the maximum resolution that can be set is still 1980 x 1080 60Hz / 8bit with HDR.
4. I also tried connecting the HDMI port to the TV as the only monitor, but nothing.
From the Intel website it would appear that the 3840 x 2160 60Hz mode was also possible via HDMI and also for multiple screens.
Attached some picture with more details (driver versions, etc.).
Do you have any suggestions?
Updated or alternative drivers, recommended (and personally tested) HDMI cables, …
BR
Stefano
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Unfortunately, it seems that HP has decided to only provide the HDMI port in version 1.4. The capabilities of the ports depend not only on the built-in integrated graphics, but also on the components used by the Original Equipment Manufacturer (OEM = HP) on the signal path from the processor to the port.
HP Z1 G9 Tower Desktop PC - QuickSpecs
It is recommended to use a monitor with a direct DisplayPort > DisplayPort connection. If you want to use the TV with its full capabilities (4K @ 120 Hz RGB 10-bit HDR), I can recommend this: DisplayPort 1.4a > HDMI 2.1 FRL Protocol Converter Cable
I'd recommend to only perform the firmware update described in the link if there are issues. If something is wrong with the colors, please first check the TV settings according to the operating instructions, especially this one (Uso del Livello di nero HDMI):
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If this information from the QuickSpecs is correct, then you will only be able to achieve 4K @ 60 Hz with the cable mentioned.
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Hello MUC, thank very much for your prompt and detailed support. Yes the PC is HP not Dell, sorry.
Unfortunately the cable you suggested is only 1,5m long and I need a cable at least 2m (better 2,5 or 3m). I have seen this one (the same brand) https://www.amazon.it/CABLE-CLUB3D-DISPLAYPORT-8K60HZ-ACTIVO/dp/B0B6BYL5N7/ref=sr_1_1?keywords=8719214472436&qid=1702222614&sr=8-1 but the reviews are not so goos and the proce is not so cheap, so I have some doubts. Do you have any other suggstions?
Condisering that the HDMI 1.4 specifications (https://www.hdmi.org/spec/hdmi1_4b) says that the standard includes support for 4096×2160 at 24 Hz, 3840×2160 at 24, 25, and 30 Hz, I am wondering why using the current HDMI-HDMI cable (CSL - 4m Cavo HDMI 4k 60Hz HDR - HDMI 2.0 a b - 4K 3D UHD 1080p 3D HFR Ethernet - Full HD 1080p ARC e CEC - schermatura tripla e schermatura connettore e contatto : Amazon.it: Elettronica) I cannot al least set up the resolution 3840×2160 at 24, 25, or 30 Hz; afterall with other devices and the same cable I can (up to 60Hz).
Thank you
Kind regards
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Your first link leads to the recommended CAC-1087. It is 3 meters long. I have it myself. The integrated protocol converter chip Synaptics VMM7100 is the best currently available.
It is true that HDMI 1.4 should actually also be capable of 4K @ 30 Hz (bandwidth 9 Gbps, 297 MHz TMDS). But for some reason HP decided not to offer this with the integrated port. The QuickSpecs (page 22) say:
So you would have to ask HP about this.
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Thank you again MUC for you precise explanations,
you're right, sometimes I should carefully read the users manual, sorry.
Than, considering that:
1. the max. possible resolution (even through onboard DP) is 3840 x 2160 at 60Hz;
2. I already own several HDMI cables 4k-60Hz capable;
3. the CAC-1087 is quite expensive;
4. I don't need soon to use 8k capable devices nor 4k at 120Hz;
.... what do you think about this option?
https://www.amazon.it/gp/product/B08989D7RZ/ref=ox_sc_act_title_1?smid=A11IL2PNWYJU7H&psc=1
or a similar solution?
It is cheaper and fit to my goal, right now.
Thank you again.
Best regards
S.
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Yes, that can work. Since I don't know the integrated technology, I can't make any real statements about it. Please note that HDR may not be enabled with this adapter.
If possible, you should always use a cable instead of an adapter. An adapter with a socket that requires a separate (long) cable to be connected to may result in more signal degradation due to longer traces and multiple connectors in the path. This can cause dropouts due to an unreliable HDMI connection at maximum link rate (4K @ 60 Hz RGB = 594 MHz TMDS = MAX HDMI 2.0).
But you can try the €10 adapter and send it back if it doesn't work.
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Dear MUC,
I tried with that adapter and it works fine as expected.
- UHD with HDR 10 bit up to 30 Hz;
- UHD with HDR 8 bit up to 60 Hz.
For the moment I solved the problem with 7,70 eur. I am satisfied. Thank you
Kind regards
S.
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I'll try! Thank you.
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Hello, @Stefano_Gerotto
Thank you for posting on the Intel® communities.
I am glad to see that other fellow members jumped in and helped in.
If I may jump into the conversation, Intel does not recommend using any kind of adapters and cannot guarantee 3rd party products/adapters will work as expected: Using Video Cable Adapters, Splitters and/or Docking Stations in Computers not Manufactured by Intel article.
We strongly recommend you contact your System Manufacturer as this seems to be a System Manufacturer HDMI (1920x1080) limitation issue, as specified in the PC Manual, page 22. Even if an adapter works fine, it may not give the desired resolution due to this limitation.
Best regards,
Jocelyn M.
Intel Customer Support Technician.
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thank you Jocelyn for your advise.
Unfortunately HP doesn't offer as good an online technical service as Intel, and so it's difficult to report such specific issues to them.
Although it is not a recommended solution, I solved it by using a DP-HDMI adapter. After all, the adapter manufacturer should also comply with the standard (DP, HDMI)... and luckily they advertised an honest product.
Kind regards
S.
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Hello, @Jocelyn_Intel
I also have the same problem with the HDMI port of my HP Elite Tower 600 G9,
My Samsung M7 monitor doesn't have a DP port to receive 4K signals from DP on the PC.
(Currently I am waiting for support from Intel via case number 06314993).
I also updated to the latest Intel drivers, but to no avail.
I look forward to your interest in handling receiving 4K signals from HDMI.
Best regards,
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HP Elite Series 600 G9 Desktops PCs - QuickSpecs
Please see page 7 and 44.
(3) ... 2 x DisplayPort HBR2, each 4096 x 2304 @ 60 Hz
(4) ... HDMI port 1.4b > 1920 x 1080 @ 60 Hz
(5) ... Flex port (optional), in case of HDMI > 3840 x 2160 @ 60 Hz
If (5) with an HDMI port is not present on your system, you'll have to use a Protocol Converter (PCON) cable to connect one of (3) to an HDMI port of your monitor. I'd recommend this:
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Once you have connected the cable, activate the Input Signal Plus function on your Samsung display device.
If necessary, also adjust the HDMI Black Level so that black appears really black.
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Hello @MUC ,
on PC (please see page 6),
Can I connect a cable to port number 8 for a Samsung monitor?
Thank so much!
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Your model is apparently only available in Singapore. The relevant reference is attached.
If the options described do not appear, then logically you cannot adjust anything on it. It is best to check the options again once you have received the DP > HDMI cable and it is connected. Some settings may only be visible then.
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In my estimation, the USB-C port on the front does not feature a video signal. You could only make an USB-C connection between the PC and the monitor if the optional USB-C port was available on the back of the PC.
Or you can use a DisplayPort > USB-C cable to connect the monitor. I deliberately did not suggest this because the monitor manual states that the USB-C input does not support the YCbCr 4:2:0 color model. Therefore, the suggested CAC-1087 cable would be the best option. This cable works well, I have it myself.

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