Widescreen Gaming Forum

Thinking some more about this: 4800x1200 @ 57 Hz looks like it is technically possible.

4800x1200x24x57 = 7.880 Gbit/s
This is just below the 7.92 Gbit/s limit. However, I believe some extra DVI information is contained in "blanking", which I don't fully understand. If anyone can discuss blanking I'd appreciate it.

Informative post JK. Thanks!

At least 16x12x3 seems (without knowing more about the "overhead" requirments of DVI comms) at least possible.

The Matrox Rep said he was sending my question up the line... so we'll see what they say.....

_________________
Gigabyte GTX 980 - SLI

i7-4770k @4ghz

16GB Ram

Planar SA2311W 3D Vision monitors (x3)

Windows 7 x64 Ultimate SP1

From wikipedia

Maximum clock frequency in single link mode: Capped at 165 MHz (up to 3.96 Gbit/s)
Maximum clock frequency in dual link mode: Limited only by cable quality (up to 7.92 Gbit/s)
Pixels per clock cycle: 1 (single link) or 2 (dual link)
Bits per pixel: 24 (single and dual link) or 48 (dual link only)

Single DVI largest resolution
@60Hz = 2.75 megapixels (including blanking interval)
Practical purposes
1915x1436@60Hz
1854x1483@60Hz
2098x1311@60Hz

I did calculate things so, the Dual link is capable to do 2x more then Single link
1915x1436 = 2749940 pixels = 2,74 megapixels
1854x1483 = 2749482 pixels = 2,74 megapixels
2098x1311 = 2750478 pixels = 2,75 megapixels

2,75*10^6*60Hz = 165.000.000Hz = 165MHz
165MHz * 24bits = 3.96 Gbit
This is right for Single link.

Now the other way around for dual link

3.96*2=7.92Gbit
7.92/24bits = 330MHz
330MHz/60Hz = 5.5 megapixels

3142x2357 is good
5238x1050 is also good
5040x1050 is also good, with a bit of space

Now for the DTH2G
5040x1050x57Hzx32bpp=
5040x1050=5.292 megapixels
5.292*57=301.644 MHz

So I don't understand why we must do the 57Hz. If you apply this math then you will see that 5040x1050@60Hz = 317,52MHz

If I knew how big the overhead was...

Got my reply from George at Matrox. I've spoken with George on the phone before, and he is quite knowledgable about the product:

==============

Hi Paul,

Answering your questions:

Many of us use 1600x1200x3 and have been forced to use 1280x1024x3 due to the firmware limitation of the TH2Go. Is there any chance an update will allow for this resolution?

For the time being, the only supported resolutions are the ones advertised. There is no plan to support 3x1600x1200.

Are you saying it is not physically *possible* to do 4800x1200??
In theory, it is physically possible to do 4800x1200 but it is not always accurate to judge solely by the hardware capabilities.

If so, how do you explain that this is routinely done running the *free* triplehead software application SoftTH? In fact, MANY SoftTH users run at 1920x1200x3. Your thoughts?

SoftTH is using a completely different architecture to achieve this. Although it has some advantages but it has some drawbacks as well. Take for instance the number of titles supported on the TH2Go as opposed to the handful of titles that are supported with the SoftTH solution.

Hope that you all your questions are answered.

Best regards,

George Farah
Senior Technical Support Specialist
Matrox Graphics Inc.

_________________
Gigabyte GTX 980 - SLI

i7-4770k @4ghz

16GB Ram

Planar SA2311W 3D Vision monitors (x3)

Windows 7 x64 Ultimate SP1

Hi all,

I want to start by thanking everyone for their continued interest in the developments of the Th2Go product line.

All the feedback on this forum is carefully monitored and being taken into consideration by both our engineers and marketing teams.

There is nothing more valuable than a group of dedicated customers voicing their desires and opinions for your product. It's an excellent means for us to keep our finger on the pulse of what you guys want.

TRUST ME -- WE ARE LISTENING :)


With regards to a 1600x1200 resolution, I think JKeefe's response earlier in this thread was quite informative for you guys. Resolution limitations don't exist "by Matrox's design". I.e. our intention is not to have our users suffering with res caps. There are limitations in the DL-DVI bandwidth and in the method cards currently communicate with monitors. This is not to say that larger resolutions can't be considerations as hardware develops, but at the moment our officially supported resolutions max at 3x1680x1050.

Comparing SoftTH and TripleHead2Go is also like comparing apples and oranges. Make sure to visit the SoftTH website and learn specifically how the software functions, you will see that the architechture is completely different from TripleHead2Go. Pointing out that SoftTH can do triple-1600x1200 does not mean specifically that TripleHead2Go should also be able to handle this resolution. There are numerous unique factors for Th2Go that need to be taken into consideration.

At this point, what I can say is that we are definitely aware of what you guys want, and we are working to satisfy the demands of the market as efficiently as possible within the technical limitations that present themselves.

We most definitely value your feedback and hope that it continues.

Thanks again,
Mark

I still say 1920x1200x3 is possible, at 24-30fps in progressive it should work. Provided you can make sure the fps doesn't/barely drops, it's fast enough for all but the most touchy purist.

I still say 1920x1200x3 is possible, at 24-30fps in progressive it should work. Provided you can make sure the fps doesn't/barely drops, it's fast enough for all but the most touchy purist.

....I don't know about you, but 30fps is not nearly enough for me to play any shooting game at.

It is if it's constant, I'm not saying 30fps -average- I'm saying 30fps constant.

I doubt you'd be able to tell the difference between 60fps with 30fps average and 30fps fixed.

Heck, Matrox should remove the 'th2g needs firmware to allow resolution x by y @ z' part.

Just let us send whatever res. we'd care to try and split it up in 3 equal parts.

That it's unsupported is fine, but don't put an unnecessary block. Besides, it'll save you support from failed firmware flashes.

It is if it's constant, I'm not saying 30fps -average- I'm saying 30fps constant.

I doubt you'd be able to tell the difference between 60fps with 30fps average and 30fps fixed.

Heck, Matrox should remove the 'th2g needs firmware to allow resolution x by y @ z' part.

Just let us send whatever res. we'd care to try and split it up in 3 equal parts.

That it's unsupported is fine, but don't put an unnecessary block. Besides, it'll save you support from failed firmware flashes.

For video, I doubt it to. For video games, the difference is quite easy to see (for me at least).

Here, download this.

I can tell the difference, I don't know about you.

I've never put it to the test in detail, but I do know the only times fps was low enough for me to notice something was when it went under 20fps or so. And that's including shooters like ut2004.