SLG3000 Geforce GTX 760 no picture

[nanoflower]

Hi, I'm having some problems getting a picture from my Geforce GTX 760 via the SLG3000 and it's starting to get to ,e
The SLG300, the DL-DVI-I to VGA adapter and all cables has been tested and found working.

Scenario:

Sapphire Radeon HD 4550:
DL-DVI out > DL-DVI-I to VGA adapter (24 + 5 pins)> VGA cable > SLG3000 Video In > SLG3000 Video Out > VGA cable > Monitor
This gives me a picture and I am able to produce the scanlines I'm looking for

Gainward GTX 760 Phantom:
DL-DVI out > DL-DVI-I to VGA adapter (24 + 5 pins)> VGA cable > SLG3000 Video In > SLG3000 Video Out > VGA cable > Monitor
This exact same chain via the GTX 760 Phanton does not produce a picture.
The LED on my Monitor (Samsung 210T) just flashes indicating there is no signal
With out the SLG3000 in the chain I get a signal so somewhere in between there something gets mixed up

Does any one of you have an idea about whats causing the problem with the GTX 760 or have a suggestion on how to get this card working with the SLG

Thanks / Nanoflower

[blizzz]

The SLG3000 requires a certain sync polarity. Could be that the HD4550 outputs what the SLG3000 expects and the GTX 760 outputs at a different polarity. I think you can change the sync polarity on a PC, but I'm not sure how easy it is.

But as far as I know you should still get a picture on your monitor. Just without scanlines and overall darker.

[nanoflower]

The SLG3000 requires a certain sync polarity. Could be that the HD4550 outputs what the SLG3000 expects and the GTX 760 outputs at a different polarity. I think you can change the sync polarity on a PC, but I'm not sure how easy it is.

But as far as I know you should still get a picture on your monitor. Just without scanlines and overall darker.

I was afraid it could be something along those lines. I did some reading and it seems a device like the HDFury3 can change the polarity. However it's an awful lot of money to spend based on something that 'might' work.

If anyone else has some thoughts about this they'd be much appreciated

Thanks for your input blizz

/Nanoflower

[blizzz]

You can specify the sync polarities on PC if you choose a custom modeline. I don't think that you need an external device for that.

I'm on a PC with Intel integrated graphics at the moment and there's an option to specify the polarities under "Display Custom Resolutions". There should be something similar for NVidia.

[Fudoh]

Or you can flip the switches on the SLG3000 instead. You should be able to match all existing polarities. Still I don't think that this is the problem. You'd get a dim picture without scanlines, but not nothing...

[SGGG2]

The original SLG didn't have an invert sync option (problems with the HDFury 2 and others), was there a redesign?

[Fudoh]

IIRC: The v2 has reduced functions (only 2 dips left), but the original had those 5 dips and I can use it to get scanlines on sources, on which the MiniSLG can't get anything. Weren't these used to adjust to the incoming polarity ?

[SGGG2]

Polarity alignment wasn't discovered to be an issue until they were well into our hands. Arcadeforge looked into it for v2 but decided it would drive the cost up too much. I haven't looked into it real closely but the three DIP switches appear to be related to the R, G, and B lines. Toodles SLG has a polarity switch, not sure about Mini SLG and others.

[nanoflower]

Polarity alignment wasn't discovered to be an issue until they were well into our hands. Arcadeforge looked into it for v2 but decided it would drive the cost up too much. I haven't looked into it real closely but the three DIP switches appear to be related to the R, G, and B lines. Toodles SLG has a polarity switch, not sure about Mini SLG and others.

Hi, I did some further testing and it's beginning to narrow down.
My SLG3000 is a V2 and I did try setting all thinkable dip switch combinations with out luck

Here's where I'm at.

When running the Radeon chain the red power led on the SLG3000 light up instantly and this chain work as expected.

When running the 'full' GFX 760 chain the red led never light up
The funny thing is if I remove the VGA out cable from the SLG (running it with no monitor) and power up the PC, the red led do come on...eventually...it is VERY delayed, it looks like the signal/power the SLG need is only passed through when windows has finished booting up. After that I can connect the monitor and a picture is produced.

Any thoughts as to what that's all about?

/Nanoflower

[BuckoA51]

There's scant reason to use the SLG with the PC these days anyway, what with Retroarch and MAME HLSL, have you considered a software only approach might actually be better?

[nanoflower]

There's scant reason to use the SLG with the PC these days anyway, what with Retroarch and MAME HLSL, have you considered a software only approach might actually be better?

Hi BuckoA51

Yes I definitely considered the software approach. I messed around with Nueda's INI Creator v0.3 http://shmups.system11.org/viewtopic.php?p=970926
for a while but couldn't get it working - the .bat file created no files and kept telling me to configure mame.ini (which I have done) - so I have some reading up to do on that part.

Now that I have the SLG it really annoys the c**p out me that I can't get it working on my rig.
I'm starting to think my PSU is not powerful enough and that the GTX drain it during boot. The PSU is a 550 W BeQuiet Dark Power PRO
Looking at the GTX 670 documentation a 500 W minimum is recommended.

/Nanoflower

[BuckoA51]

I'm starting to think my PSU is not powerful enough and that the GTX drain it during boot.

I think that's extremely unlikely.

Correctly configured, mame's HLSL will blow SLG3000 out of the water on a modern display, I'd spend your time getting that to work rather than worrying about the SLG3000.

[nanoflower]

Correctly configured, mame's HLSL will blow SLG3000 out of the water

I haven't fully explored that option. Some time ago I did try and copy some HLSL settings I found in a forum thread but I wasn't really satisfied with the result.
If the HLSL based scan lines are as good as you say when configured correctly, then perhaps I should.

The INI Creator v0.3 (apparently) create individual profiles for several systems so I guess an over all configuration in mame.ini won't cut it.

Do you have a suggestion on a good place to start, perhaps a few links you your self have found useful?

/Nanoflower

[BuckoA51]

I just looked over that thread and copy-pasted in some settings I thought looked good into the mame.ini. I then adjust gamma for each game based on my preferences. I'd say that was a pretty good place to start. When you're satisfied with this you can use the ini creator to create tweaked profiles for certain games.

[nanoflower]

I just looked over that thread (...). I'd say that was a pretty good place to start

Thanks for your input BuckoA51, I guess Ill have to do some reading up then

Hi, I'm having some problems getting a picture from my Geforce GTX 760 via the SLG3000 and it's starting to get to ,e
The SLG300, the DL-DVI-I to VGA adapter and all cables has been tested and found working.

Scenario:

Sapphire Radeon HD 4550:
DL-DVI out > DL-DVI-I to VGA adapter (24 + 5 pins)> VGA cable > SLG3000 Video In > SLG3000 Video Out > VGA cable > Monitor
This gives me a picture and I am able to produce the scanlines I'm looking for

Gainward GTX 760 Phantom:
DL-DVI out > DL-DVI-I to VGA adapter (24 + 5 pins)> VGA cable > SLG3000 Video In > SLG3000 Video Out > VGA cable > Monitor
This exact same chain via the GTX 760 Phanton does not produce a picture.
The LED on my Monitor (Samsung 210T) just flashes indicating there is no signal
With out the SLG3000 in the chain I get a signal so somewhere in between there something gets mixed up

Does any one of you have an idea about whats causing the problem with the GTX 760 or have a suggestion on how to get this card working with the SLG

I'd still be open to suggestions on the initial problem if any one has an idea

Cheers / Nanoflower

[Lord of Pirates]

There's scant reason to use the SLG with the PC these days anyway, what with Retroarch and MAME HLSL, have you considered a software only approach might actually be better?

Hi BuckoA51

Yes I definitely considered the software approach. I messed around with Nueda's INI Creator v0.3 http://shmups.system11.org/viewtopic.php?p=970926
for a while but couldn't get it working - the .bat file created no files and kept telling me to configure mame.ini (which I have done) - so I have some reading up to do on that part.

Now that I have the SLG it really annoys the c**p out me that I can't get it working on my rig.
I'm starting to think my PSU is not powerful enough and that the GTX drain it during boot. The PSU is a 550 W BeQuiet Dark Power PRO
Looking at the GTX 670 documentation a 500 W minimum is recommended.

/Nanoflower

The 760 eats up about 170w under full load, it's definitely not using that much power when the PC is booting.

[nanoflower]

The 760 eats up about 170w under full load, it's definitely not using that much power when the PC is booting.

I guess the real question is this:
What exactly is the Radeon HD 4550 outputting at PC/BIOS boot up that gives the SLG3000 the kick it needs to fire up?
-and-
Why does the Geforce GTX 760 only start outputting this after the Windows OS has booted up?

[BuckoA51]

Only one of the 760's DVI outputs is DVI-I, so only one supports VGA. It's probably the secondary, hence why you don't get any display at all until Windows finally boots.

[nanoflower]

Only one of the 760's DVI outputs is DVI-I, so only one supports VGA. It's probably the secondary, hence why you don't get any display at all until Windows finally boots.

Hi, the output I'm using on the 760 is VGA compatible. The DL-DVI-I to VGA adapter work fine without the SLG - are you suggesting I try the DL-DVI-D output (24 +1 pin?)

[BuckoA51]

No, that definitely will not work I'm suggesting the output that is VGA compatible is the secondary monitor output and that is why you don't get a picture until Windows boots.

[nanoflower]

No, that definitely will not work I'm suggesting the output that is VGA compatible is the secondary monitor output and that is why you don't get a picture until Windows boots.

As said, I do get a boot up/BIOS picture if the SLG is left out of the loop - But you could be right. The card does have both HDMI and Display Port outputs and one of those two may very well be the primary
A desperate act led me to order a HDMI to VGA cable, I'll give that a go when it shows up (I don't have my hopes up though)

[blizzz]

A desperate act led me to order a HDMI to VGA cable, I'll give that a go when it shows up (I don't have my hopes up though)

Unless you bought an active converter, a HDMI to VGA cable cannot work. I didn't even know that you could buy these.
Edit: Just found out that these HDMI to VGA cables are for notebooks that can output VGA on their HDMI port.

[nanoflower]

A desperate act led me to order a HDMI to VGA cable, I'll give that a go when it shows up (I don't have my hopes up though)

Unless you bought an active converter, a HDMI to VGA cable cannot work. I didn't even know that you could buy these.
Edit: Just found out that these HDMI to VGA cables are for notebooks that can output VGA on their HDMI port.

You are killing me here - can't win 'em all I guess