DisplayPort 1.4 to HDMI 2.1 8K 60Hz HDR Active Adapter

First let me say that the product is working perfectly but there is a backstory to this.

I originally bought this in October of 2021 and was disappointed that it was only passing a 4:2:0 signal from my 6900xt to my LG C1 and had intended to return it (even received an RMA). I changed my mind on the hope that it was a firmware issue that would be resolved as a support e-mail had said the issue may be with LG OLEDs at that time.

Well, I don't know which firmware did it but I decided to try this again tonight on a whim and it works great.

Excellent product, plug & play operation for my setup and enables the 4K resolutions as standard, no custom configurations required.I purchased the DisplayPort 1.2 to HDMI 2.0a Active adapter to see if it performed better than the older DisplayPort to HDMI Passive adapter I had on hand with a recently purchased 50" flat panel. While the DP-HDMI passive adapter allowed me to display 3840x2160 resolution, I had to create a custom resolution for the NVIDIA GPU. After each reboot, and often after unlocking the screen saver, the custom setting and passive adapter combination would disable the 4K monitor and revert to the base 1920x1080 resolution, requiring multiple time consuming steps to re-enable the 4K monitor. I deemed the custom resolution configuration as the root cause of the instability since using a 40" 4K monitor with the same DP 1.2 port did not result in the same challenges.To satisfy my curiosity I purchased the Uptab adapter, fully expecting that the results would be the same as with the passive adapter.First I tested the Uptab DisplayPort 1.2 to HDMI 2.0a Active adapter with the 40" Seiki SM40UMP that I have been using with a single DP 1.2 connection @ 4K resolution, swapping the DP 1.2 cable with the adapter and a Redmere 18+ Gbps HDMI cable. As expected, the Seiki immediately switched to HDMI and resumed displaying 4K @ 30Hz*.I powered down, switched monitors and connected the Redmere HDMI cable to the 50" monitor using one of the two 4K@60Hz rated ports. After starting back up I was pleasantly surprised when the computer immediately recognized the 50" monitor as with 3840x2160 resolution, requiring no custom resolution configuration. Even more surprising, is that the Uptab DisplayPort 1.2 to HDMI 2.0a Active adapter exposed an undocumented *second* 4K resolution of 4096x2160 @ 24 Hz on the 50" monitor panel! Of course, I tested the 4096x2160 "true 4K" resolution and it works without issue --- Easter Egg in a monitor!Regardless, I switched back to the 3840x2160 resolution to continue testing the stability of the configuration over the next several days. Using the 4096x2160 resolution added a variable and if instability issues resurfaced, would leave me wondering if the root cause was the adapter/monitor combination or the 4096/adapter/monitor combination.My configuration is:Dell Latitude E6520 i7-2720HQM with Intel HD 3000 IGU**NVIDIA NVS 4200M GPU with 512 MB dedicated video memory**Samsung 1TB 850 EVO SSD; 2TB Seagate ST2000LM00716 GB DDR3 1866 Mhz ramDell PR02X E-Port II Plus Docking Station (supplying the 2x DisplayPort/DVI-D ports)- screen shots attached*My current computer configuration will not support 4K@60Hz from a single DP 1.2 port, therefore I cannot test the full HDMI 2.0a 60Hz capabilities of the adapter.**Before anyone points out the fact that the Intel HD 3000 and NVIDIA NVS 4200M GPUs have a documented maximum resolution of 2560x1600, you are absolutely correct --- and I was planning to purchase two 27" 2560x1440 monitors to replace the two 27" 1920x1200 monitors that were failing after 8 years of constant use based on the Dell and Intel documentation. I already had the 50" monitor and decided to see how it would look at the 2560x1440 resolution which led to the discovery that the E6520+Docking Station combination would drive a 4K resolution from a single DP port.Just as Dell's documentation states that the E6520 can only support 8 GB of 1333 MHz ram, it is a well known fact that Dell usually understates the full capacity of the on-board chipset. I've been running 16 GB of 1866 MHz DDR3 ram (2x8 GB DDR3 SODIMM) since mid-2013 without issue and have been watching the prices of the 32 GB 1600 MHz DDR3 SODIMM kits(2x16 GB DDR3 SODIMM) for the past year to see if I can access the full capacity of the Intel chipset in the notebook.

So far so good. Was able to get my Samsung 40" 6500 4k tv displaying 60fps/60hz through my Radeon R9 Nano with this converter.The email UPTab sends it pretty helpful. Here it is (some links removed):Here are some Tips and Tricks for using your new DisplayPort 1.2 to HDMI 2.0a Active Adapter [****] TV manufacturers (Sony, Visio, LG, Samsun) are labeling their HDMI ports as 4k at 60Hz which are NOT HDMI 2.0 capable. Make sure the HDMI port you are using on the TV is HDMI 2.0 capable and not just 4K at 60HZ capable. HDMI port 4K at 60Hz indicates it is HDMI 1.4 capable of running 4K at 60Hz with color sampling of 4:2:0. Our adapters are full specification HDMI 2.0 and support color sampling 4:4:4 at 4K at 60Hz.* If your TV has marking 4K at 60Hz at the HDMI port, you will need to change the color scheme to 4:2:0 in your NVidia or AMD drives settings then change the refresh rate to 60Hz.* Apple MacBook Pro and Mac Pro – For now Apple El Capitan doesn't support 4K at 60Hz out of the box. To be able to enjoy 4K at 60Hz on OSX you need to install SwitchResX to force the 60Hz by creating custom resolution. You can download SwitchResX form madrau.comFirst I downloaded (and purchased) SwitchResX, but you can download a trial that works for 10 days.In El Capitan there is a new security feature called SIP "System Integrity Protection". Unfortunately this prevents SwitchResX from modifying the system files that contain resolution information. But you can temporarily disable "System Integrity Protection" to make changes. Once the resolution has been created and activated, you can turn SIP on again.Disabling SIP requires booting into the recovery partition. You boot in recovery mode by pressing CMD + R when starting up your Mac.Then open a Terminal window. Utilities->Terminal and type the command below: csrutil disableTo re-enable SIP once the changes have been made; boot back into the recovery partition and set state to enabled: csrutil enableNow boot to El Capitan and open SwitchResX. Select the TV from the pane on the left. Then select "Custom Resolution". I entered 3840 x 2160 and made sure that the Scan Rate for Vertical was set to 60 hz. Scaling is also possible.Save the changes (by hitting apply, and rebooting your mac.. it will ask you to save). After the reboot you will see the custom resolution added within SwitchResX under "Current Resolutions" for your TV.* Often TV's have 4 or more HDMI ports, but only 1 is suited for "2.0" standard.* Please disable all TV enhancements like up-converting picture enhancements because in many cases this settings will add lag.* On many TV’s you need to turn on "HDMI UHD Color" manually in the settings of your TV under "Picture Options" for the HDMI port to which your pc/mac is connected.* Pleas make sure "Input Type" is set to "PC" or "Game Mode".* Please make sure your device Mini DisplayPort or DisplayPort are version 1.2 or 1.3.* By default some devices have their Mini DisplayPort and DisplayPorts configured for DP 1.1 and you need to change manually to 1.2.* Also it could help when connecting 2 screens, to set the screen connected thru the Adapter as second/secondary screen.* Use an HDMI cable rated for the bandwidth of 4K "4K HDR, 18 Gbps"

This product does in fact convert an HDMI 2.1 signal into a DP 1.4 signal. And it will give you 4k @120Hz, but imo a lack of Gsync support vastly undermines the usefulness of this product. As without Gsync the only time you'll get a stable and consistent framerate is when running games that don't drop below 120fps as you can then rely on traditional Vsync, and a locked 4K @120Hz is pretty rare for any GPU that would need this product to begin with. Also, HDR is finicky so sometimes you'll need to switch from PC resolutions to TV resolutions then back again in the Nvidia Control Panel to reactivate it after it's lost.I did read a review by another customer who claimed to have achieved 4K/120Hz with HDR & Gsync active, but for me the Gsync option completely disappears in with Control Panel while using this product. If Gysnc was actually working for this product it would be highly useful all of the time (instead of just in niche situations) and it would be a godsend. My set-up is a 65 inch LG C9 OLED and Nvidia RTX 2080 TI.Update: I figured out a workaround and now Gsync is up and running. You'll need to connect another HDMI cable to your GPU in addition to the one that's connected to your UPTAB. This will give you 2 active displays. Be sure to select the display connected to your UPTAB as your main display, and go into Nvidia Control Panel and turn on Gsync which will now be visible and available for use. This method is finicky so you may need to make a few adjustments every time you power on your PC, but you will get 4K @120hz with Gsync active. And for anyone that's having issues with black bars on screen while using this device, just go into the Nvidia control Panel under "adjust desktop size and position", check under the scaling tab, and ensure that "display" is selected on the "perform scaling on" drop down menu and this will rectify the issue.

As a Mac Pro owner with a 4K 40" TV as a monitor ([...]) I have been plagued by the uphill battle that is trying to get it to display at 60Hz. I asked over at the usually uber-informative MacRumors.com forums where the replies were talking about needing to use the pixel clock hack and installing SwitchResX to be able to manually configure the GTX970 that I use to output at 4K using 60Hz. But it was all in vain. I asked also if maybe I needed an adapter as I have seen reports that everyone who bought a 4K monitor (using Displayport1.2) just connected and got the magical 60Hz, even though the TV and the GPU being HDMI2.0 and thus supporting 60Hz (but Windows it works fine), But no-one had an answer.So, I was at the point where I was going to sell my TV and bite the bullet and get a more expensive monitor (TV cost $200) I thought, I will give this one final chance and searched for DP1.2-HDMI2.0 adapter on Amazon (finding this one). I did not see any specific Mac Pro reviews, but at wits end had to give it a try.I just received the package today and came down and connected it up. Amazingly, the TV notified me that it is displaying in glorious 60Hz!I did already have the SwitchResX installed (and an email from the seller says that Mac Users might need to use SwitchResX to force 60Hz) so that might be why it instantly works.