Hello Summerfield27,

Would you be so kind to provide the type (brand and model number) of monitor you are using? so that I have a complete picture. Just to be sure you are using the CAC-1510?

The monitor is a Dell 3007WFP-HC and yes, I’m using the CAC-1510.

Hi,

May i ask what cable you use to connect from the CAC-1510 to the Dell 3007WFP-HC? is it a single link or dual link DVI cable? a Dual link DVI cable is needed to get to the  2560×1600. 

were you able to do 2560×1600 before?

It is a dual-link cable. I’ve been using this monitor with an older Mac Pro with a dual DVI video card. I’m using the same cable with the new adapter. 

Hello All,

could you please try out the following solution.

Apple display settings will hide the resolution, so pls hold down the Option button on the Apple display resolution interface, and then click the zoom

position of the resolution interface to display the hidden resolution. Then check the real resolution.

Feel free to send feedback so it will contribute to the forum 🙂

My monitor now working at 2560×1600. I would have sworn that resolution wasn’t a choice when I tried adding it, but it is now and I was able to select it. When I did select it my screen went black for about 10 seconds and then it came up in the proper resolution. Thank you for your help. 

Hi Summerfield27

Thank you for the feedback.

Good luck with the CAC-1510

that works, but awkwardly. when I open display preferences, with or without option held down, it shows scaled is selected with only 1280 and 1024 available, the only way to access 2560 is to option-click ‘default for display’, which switches it to 1280 even with option pressed, then option-click scaled button at which time 2560 appears and then option-click that to obtain the full resolution. thank you. SO my question is, why does the driver think that my cinema 30″ display default is 1280? is there something you can change in the 1510 so the system defaults this display to 2560?

I wanted to post a small review about the CAC-1510 as I had concerns I may not achieve 2560×1600 resolution on both my DVI-D Dual-Link monitors. Both Monitors are Dell 3007WFPHC and I them set up in a triple screen setup with my Macbook’s inbuilt screen as one of the 3. The Macbook Pro is a 15″ 2019 version, with the only ports being USB Type-C and 3.5mm audio/mic. In summary, I am running two of the 3D CAC-1510’s and they both achieve full 2560×1600 on both Dell 3007WFP Monitors simultaneously. These are old, but still fantastic monitors and I am simply delighted with this 3D product.

I have CAC1510 connected from my RTX 2080ti card to 30inch Apple Cinema Display running at 2560×1600 @ 50hz just fine, but as soon as I switch to native @60hz then I get blue lines like noise appear on black parts of the image or black background.  I had to create this 50Hz setting to get clean picture.  Any tips?  Why do I get this blue static lines dancing in black parts of the image at 60hz.

I have tried to play with pixel clock but can’t find the right setting.  I found some links that have EDDID dumps for this monitor i think:

Mode = 2560 x 1600 @ 60Hz
H. Active……………2560 pixels
H. Blanking………….160 pixels
V. Active……………1600 lines
V. Blanking………….46 lines
HSync Offset…………48 pixels
HSync Pulse Width…….32 pixels
VSync Offset…………3 lines
VSync Pulse Width…….6 lines
Pixel Clock………….268.00MHz
Horizontal freq………98.53kHz
Vertical freq………..59.86Hz
H Image Size…………641mm
V Image Size…………401mm
H Border…………….0 pixels
V Border…………….0 lines
Non-Interlaced
Sync: Digital separate with
* Positive vertical polarity
* Negative horizontal polarity

I can’t get 268.00Mhz whatever i set.  268.04 is the closest i can get it but its still showing blue lines.

Thanks for your help.

Also I wanted to know is there a way to split the usb-c to power two of these monitors by using two adapters?

I purchased a Club 3D CAC-1510 adaptor for IDVI-I DUAL LINK Active to USB Type C so that I may drive my 30″ Apple Cinema HD Display with my 2021 13″ MacBook Pro.  Like others have reported, the Cinema HD is stuck at half its capability, 1280 x 800 rather than 2560 x 1600.  Any ideas about how to address this issue?

PROBLEM WITH CAC-1510 USB TYPE C TO DUAL LINK DVI-D  I conect the mac mini 2020 M1 with the adaptor and a USB to give adicional power. My monitor it´s a APPLE CINEMA DISPLAY 30″ it´s works but only 1280 x 800 rather than 2560 x 1600….. I run on OSX Big sur 11.6 , it´s there anything to do ????