BNC Vs D-SUB

Ok now i've been told many a time that RGB BNC is better than standard d-sub connections for monitors, but how much better is it really?

Would it be noticeable? I've got a 21" Samsung 1100DF with 5way BNC connectors on the back aswell as a d-sub, currently using the d-sub connection, and a radeon X800. I can get a high quality BNC cable for about £10; would it be worth the money to change?

I'm thinking I might go for it anyway just for the geeky extra wires :P but I cant find any comparisons about on the net anywhere..perhaps its something hexus could investigate ? :)

Anyone able to enlighten me?

IIRC the difference between the two types of cable gets more the bigger the screen gets. It might be worth spending 10 quid and seeing if you notice any difference. If you don't then you can always return it.

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Originally Posted by Spud1

I'm thinking I might go for it anyway just for the geeky extra wires

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Sounds like as good a reason as any! For large monitors it is apparently better, but I think DVI-I cables are the way forward now.

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Originally Posted by Kez

Sounds like as good a reason as any! For large monitors it is apparently better, but I think DVI-I cables are the way forward now.

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I think so too, but if he hasn't got a dvi port on his monitor then he is a little limited ;)

CRTs with DVI are pointless tbh...CRT technology is analogue, so a DVI cable would just make things worse not better as the signal would either be converted to digital and then back to analogue or simply sent through the cable as analogue depending on the cable used...

I have the same monitor, and have used both :)
At "normal" resolutions around the likes of 1280 * 1024, you’ll only notice a small difference, if any. Although the quality of the normal D-sub cable matters a lot here.
Once you start rising the resolution above this, its well worth it. At high resolutions and refresh rates, D-sub just didn’t cut it for me (slightly blurry). If this is a downfall of the monitor, the D-sub cable, or just the reason BNC was made for, im not sure, but it works :)

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Originally Posted by Spud1

CRTs with DVI are pointless tbh...CRT technology is analogue, so a DVI cable would just make things worse not better as the signal would either be converted to digital and then back to analogue or simply sent through the cable as analogue depending on the cable used...

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A DVI-I cable has provision for both analogue and digital signals. DVI-A is a DVI cable without the digital wires, and DVI-D only has the digital wires.

You know those DVI > DSUB adapters? They don't "convert" signals at all, they just rewire the analogue pins of the graphics card's DVI connector to the normal DSUB pinout.

The reason DVI-I cables are considered better for analogue than DSUB is that the pins and cable design are supposed to be better suited to higher resolutions and refresh rates. How much of a difference it really makes... I don't know.

Larger displays and professional kit have always had the bnc as well as Dsub and the bnc comes into it`s own when you want higher res and a better signal feed than analogue dsub can provide.
DVI is now the requisite replacement for pro work especially high res digital editing etc.

well i went an got one today, and the difference is good :)

I use a 'normal' res of 1600x1200 @ 85hz (1280 * 1024 is HUGE on this monitor, you really need 1600x1200 :) ) and i can definitely notice a difference, much sharper with the bnc :)

cheers for the input

BNC is a true 75 Ohm connector. The 5 BNC lead will run an RGBHV signal through 3 seperate wires i.e. red, green and blue (RGB), plus sync on the other two (HV -horizontal and vertical) This will provide the best picture possible.

You should see a sharperand overall a better picture. For 10 quid it's definitely worth it.

P.S. I use a scart to 4 bnc lead for Sky+ to plamsa (carrying RGBS - sync on composite) with excellent results.

Edit: oops just read the last post sry.

Can you run BNC over a larger distance than D-SUB as well?

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Originally Posted by Caged

Can you run BNC over a larger distance than D-SUB as well?

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Not seen very long cables advertised using D-SUB to 5 BNC connectors. BNC is the connector not the cable. I would expect a reasonable distance for video for well shielded cable carrying RGBHV. I have a friend who is running D-Sub (VGA which carries RGBHV) around 15m with no problems. I would say 15-20m is fine with good quality cable.

Ok did some poking about on an av forum. You can buy the highest quality VGA to 5 BNC from this bloke Not cheap!! but gives an idea of lengths.

Thread here for lengths.