"I am using my Samsung 240T with a Belkin ADC to DVI converter with the standard Geforce4 MX at 1900x1200 resolution and it is beautiful. I was going to order the HD Cinema display, however the specs on the 240T are much better and has the ability to run an S-Video in as well and with their external speakers one can use it as a TV either full screen or Picture in Picture while using it as a computer monitor. I would recommend this monitor highly for those considering the HD.
Howard B., MD"

I asked if he noticed any "fuzzy text" that was commented on in a past report below when used with GeForce4MX cards.

"Mike,
The ATI 128 Pro with DVI that came on the original G4 Powermac, as well as the original Mac Radeon, are both limited in bandwith, and cannot support 1920x1200 in digital (DVI) mode.

All the nVidia cards, as well as Radeon 7500 and 8500 have TDMS frequency that supports 1920x1200. According to Samsung, the monitor supports 1920x1200 in digital, as well as analog mode.

The new TiBook have DVI output and Radeon 7500. It supports the Apple 23 HD display. I bet it will support the Samsung monitor as well. Same goes for the retail Radeon 8500, which is a BTO option on the Apple 1U server.

Maybe you can ask the Apple dealer in Germany if they tried this combination with the latest drivers from Apple. If they tried the Samsung-Apple combo in February 2002 or earlier, it wouldn't have worked due to driver limitations.
Itzik"

Note - If anyone can verify that the OEM 7500 radeon card or GF4MX card works with the 23" Cinema at 1920x1200 (it's not shipped yet I hear as of early June 2002) let me know since I had an insider report that none of the pre-GF4 Ti cards supported it - but that was not something that was verified by anyone I know personally.) If it does, then an ADC->DVI adapter on those cards should work with the 240T - but see the notes below about the 240T's DVI port being a single-link interface and tips/workarounds for that.

" Hi,
I'm a happy Cinema Display user but here's some further information about the limits of DVI interface.

The TMDS signalling in the DVI interface has a maximum bandwidth of 165 Mhz, or 165 Mpixels/s. At 60 Hz this equals to a maximum resolution of 1920 x 1080 for the display over single TMDS link. Obviously not enough for a 1920 x 1200 display.

However the standard DVI interface has enough pins for two TMDS links and there are both displays and cards with a single or dual TMDS implemented (12 or 24 pins). A dual link DVI interface has double the bandwidth and therefore a maximum resolution of 2048 x 1536.

As you can see in the Samsung SyncMaster 240T brochure, the display has DVI-Digital Single Link interface and therefore it's not capable of full resolution over DVI. One can just wonder why they didn't bother a second TMDS for such a big and expensive display.

I believe Apple's cards and displays have dual link DVI interfaces to accommodate the higher resolution. I would also assume that a number of other displays and cards do have dual link capability.
Best regards,
Petri Ojala
Helsinki, Finland "

" Short answer is "Yes, the Samsung 240T works with the Mac over DVI."

They [Samsung based on email] have tested only the Nvidia GeForce4 Ti and [GF4]MX cards and the caveat is "text appears fuzzy." Not sure if the fuzziness is due to large pixel size (which also appears on the ACD HD) or something unnatural.
-wilson "

" Thanks for the article on the monitor resolution w/ the 240T. I believe your thoughts on the Geforce 4 Ti are correct.
The second page of the Nvidia PDF states the Ti supports full frame playback of HDTV--which leads me to believe 1920X1200.
http://nvidia.com/docs/lo/1467/SUPP/PO_GF4Ti_2.05.02.pdf

Yet it is frustrating that the actual resolutions supported are not clearly indicated. Apple also does not seem to have any information on the video card resolution support for its 23" HD cinema.
Rob H. "

" Mike, I too thought that 1920 x 1200 was limited to only the analog input, but Nicholas Bedworth (an editor at Perfect Vision magazine) confirms that it can manage it on the DVI input using a non-standard timing on some video cards. Normally, there isn't enough bandwidth on a single link DVI digital interface to push that much data, but Samsung has cleverly created a driver which uses the blanking interval times to push additional data. I doubt that driver has been done for the Mac :-( but it does work on a PC. See (avsforum thread)
Guy Kuo "

" Hi, I was the one who asked the 240T question. There are some user comments (mostly PC users) on the LCD here:
http://www.edgereview.com/ataglance.cfm?category=Video&ID=130
Most importantly:
"For those SyncMaster 240Ts manufactured prior to 8/2001, support for DVI at 1920 x 1200 requires the firmware to be updated through a reprogramming of the EPROM. Contact Samsung for details."

And as far as support for DVI resolution higher than 1600x1200, I have some first hand experience. I'm running an IBM T210 LCD on a PC at 2048x1536 @46Hz. My video card is the GeForce4 Ti4600. The maximum DVI resolution that a card can support seems to be limited mostly by the TMDS trasmitter chip. Cards that use the Silicon Image Sil164 transmitter can drive very close to the theoretical limit of 165MHz pixel clock rate of single-link DVI. From the pixel clock rate, you can easily estimate the maximum resolution. The formula is:
(resolution x refresh rate) x (1 + blanking interval) = pixel clock rate

The blanking interval is used for synchronizing the display and usually is about 5% to 10%. Take my T210 for example, 2048x1536x46 x (1+0.1) = 159MHz. The Radeon 8500 Mac Edition manual claims that they have driven a panel at 3840x2400 @15Hz. Pixel clock rate = (3840x2400x15) x (1+0.1) = 152MHz
See www.atitech.com/support/manualpdf/Radeon8500MacEditionUserGuide.pdf page 33

Unfortunately, this still does not answer the original question.....
BTW, if anyone knows how to manually dial in the video timing (front porch, sync width, back porch, etc.) on the Mac, I'll be happy to share the IBM T210 timing spec.
-wilson "

This reader's comments are not on the Samsung 240T, but on another DVI LCD monitor use with Mac graphics cards:

" Hello Mike,
I don't have the Samsung monitor, but I had troubles running a Dell 20" flat panel (1600x1200) using the DVI connector. Maybe my experience can help the person with the Samsung monitor.

I tried the Dell monitor with nVidia Geforce2 and Geforce3 as well as ATI original Radeon, Radeon 7500 and Radeon 8500. Before February 2002, the limitation was with the drivers. All the cards supported a maximum of 1600x1024. I knew that this was a driver (or firmware) limitation, because the Geforce3 definitely supported 1600x1200 on a PC.

When I received my 2002 Quicksilver with Radeon 7500, it supported the Dell using ADC to DVI adapter. Later on, Apple released the nVidia v.3 drivers for OS 9. Now the nVidia cards supported the Dell as well. Also, there was an ATI driver update for OS 9 (it was downloaded via the Software Update control panel). All this happened around the time that Apple announced the 23" HD Cinema Display, with 1920x1200 resolution. Coincidence?

In OS X world, 10.1.1 supported 1600x1024, but 10.1.2 supported 1600x1200.

I sold the original Radeon before the latest drivers came out, so I don't know if it would support the Dell monitor. However, the other cards are on Apple's list of video cards that support the HD display.

What I'm saying is that I think that the Samsung monitor should work with any card that supports the HD display, as long as the latest drivers are used. In my experience, it does not matter if the card has native DVI connector, or it has ADC connector and needs the ADC to DVI adapter.
Hope this information helps!
Itzik "

(Clip from Tuesday's news follows)
Monday's news had a reader request for reports on using the Samsung 240T 24" LCD display (1920 x 1200) with a Mac using the DVI port.

"Hello, we are a Apple-Dealer in Berlin, Germany.

A few months ago we sold this display to an customer of us.
Unfortunatly this display never will make an resolution of 1900x1200 on the DVI-Port, only 1600x1200...
Neither PC or Mac...
Only with the analog interface (VGA) can you get the higher resololution. You don‘t find any information about that, until you read the manual which came with display...!
We had to send it back, because our customer need this higher resolution too.
Very, very disappointed about the information-policy of Samsung...
Hope I could help you...
Best regards
Andreas Foppe
Pabst Computer GmbH "

(All Mac and PC DVI port card specs I've seen show a max DVI res. of 1600x1200 - although Apple lists some of these cards as 23" Cinema (1920x1200 display) compatible with their DVI->ADC adapter - I assume that's still limited to 1600x1200 mode due to the card.)
The only card that I'm not sure of is the OEM GeForce4Ti card - I wonder if that card's DVI port can drive higher resolutions than 16x12.
The other option with an ADC port card would be to use a ADC to DVI adapter ($39 or so - but ADC ports are only on the OEM Mac graphics cards, not on any retail cards.)