VGA not working (7970)

Puer Aeternus · 06-21-12, 09:04 AM

Hi, My main monitor has a DVI connector and it works fine. My 2nd monitor has a VGA end and is connected to a VGA to DVI adapter which is connected to the Mini Display port. The 2nd monitor is not working (dual monitors was working on my 5879).
I checked catalyst and it shows two displays but there is no image on the 2nd monitor...I am at a lost.

My card is a Diamond 7970

THANKS!

felixthemaster · 06-21-12, 09:16 AM

your second monitor nly has a vga connector?

what are the outputs of the card?

Puer Aeternus · 06-21-12, 09:20 AM

The 2nd monitor is a 20inch lcd w/ ONLY a VGA connector. The card has one DVI port (hooked up to my 22inch LCD) and 2 mini display ports and one HDMI.

(my 5870 had two dvi and 1 HDMI, both monitors worked fine on the DVI along w/ a 40inch on the HDMI)

felixthemaster · 06-21-12, 09:23 AM

have you tried mini display port to vga or hdmi to vga adapters?

Puer Aeternus · 06-21-12, 09:58 AM

wahoo...got it working! Hooked the vga + adapter to the DVI port and the DVI connector to the mini Display port...rebooted and right away both monitors showed up w/ the smaller lcd showing as the extended monitor. I guess the VGA does not work w/ the mini display or HDMI port. Thanks for your help and input Felix :-)

It seemed counter intuitive to hook it up this way thats why I did not try it the first time...I assume that the main display would be on the DVI connector, its just always been that way on my past few cards. So hooking up the 2nd monitor on the main DVI connection did not seem right.

felixthemaster · 06-21-12, 10:02 AM

no probs! I can't wait to afford another monitor because I just realised I could really double my productivity as Ive set way too many hotkeys to do the "alt+tab" thing! almost every button on my mouse and specials keys switches windows as i multitask all the time!

does one of your monitors have display ports? because otherwise you cant do the eyefinity gaming thing

Puer Aeternus · 06-21-12, 03:56 PM

My monitors are two diff sizes so eyefinity would look wonky....if I want to do any serious gaming I hook up my 40inch lcd as my main display and get busy in BF3 or Skyrim

Knufire · 06-21-12, 04:05 PM

VGA is an analog signal. HDMI and Displayport are both digital only standards, meaning you need a powered DAC (digital-analog converter) to go between the two, which can be quite expensive.

DVI is meant as a bridge between both. Depending on the type of slot, it can provide analog or digital signals.
DVI-D - Digital Only
DVI-A - Analog Only
DVI-I - Intergrated (both)

However, if you have Displayport to DVI-I to VGA, all in passive adapters, it will NOT work, you need to convert the signal. DVI-I or DVI-A to VGA works fine though.

Puer Aeternus · 06-21-12, 09:56 PM

well that explains it then. Thanks for the info, now I understand.

felixthemaster · 06-21-12, 11:30 PM

i never knew there was an analouge DVI connector!

I wish they'd just make one ujniversal plug for everything like sata or for display etc. something like usb

06-21-12, 09:04 AM	Thread Starter #1
Puer Aeternus Member Join Date: Sep 2001 Location: In your head (Ottawa.Canada)	VGA not working (7970) Hi, My main monitor has a DVI connector and it works fine. My 2nd monitor has a VGA end and is connected to a VGA to DVI adapter which is connected to the Mini Display port. The 2nd monitor is not working (dual monitors was working on my 5879). I checked catalyst and it shows two displays but there is no image on the 2nd monitor...I am at a lost. My card is a Diamond 7970 THANKS! __________________ An Inflexible Belief System is B.S or I.B.S i5 750 @ 4 ghz, AC Freezer 7 rev2, Gigabyte P55M-UD2, 12 g's Mushkin Blackline 1600 dd3, Radeon 7970 Diamond Audigy 2 zs Win 7 64bit, Antec Earth Watts 650w Antec 900 Logitech G15
	QUOTE Thanks

06-21-12, 09:16 AM	#2
felixthemaster Member Join Date: May 2012	your second monitor nly has a vga connector? what are the outputs of the card? __________________ Intel Core i5 2500k processor with stock cooler Sapphire 7870 2GB DDR5 Graphics Card MSI Z77A-GD55 Motherboard Corsair HX650 Modular power supply Western Digital 1TB Caviar Black HDD (Boot drive) \| Western Digital 320GB Scorpion Blue HDD Zalman Z11 Plus case with very negative pressure
	QUOTE Thanks

06-21-12, 09:20 AM	Thread Starter #3
Puer Aeternus Member Join Date: Sep 2001 Location: In your head (Ottawa.Canada)	The 2nd monitor is a 20inch lcd w/ ONLY a VGA connector. The card has one DVI port (hooked up to my 22inch LCD) and 2 mini display ports and one HDMI. (my 5870 had two dvi and 1 HDMI, both monitors worked fine on the DVI along w/ a 40inch on the HDMI) __________________ An Inflexible Belief System is B.S or I.B.S i5 750 @ 4 ghz, AC Freezer 7 rev2, Gigabyte P55M-UD2, 12 g's Mushkin Blackline 1600 dd3, Radeon 7970 Diamond Audigy 2 zs Win 7 64bit, Antec Earth Watts 650w Antec 900 Logitech G15
	QUOTE Thanks

06-21-12, 09:23 AM	#4
felixthemaster Member Join Date: May 2012	have you tried mini display port to vga or hdmi to vga adapters? __________________ Intel Core i5 2500k processor with stock cooler Sapphire 7870 2GB DDR5 Graphics Card MSI Z77A-GD55 Motherboard Corsair HX650 Modular power supply Western Digital 1TB Caviar Black HDD (Boot drive) \| Western Digital 320GB Scorpion Blue HDD Zalman Z11 Plus case with very negative pressure
	QUOTE Thanks

06-21-12, 09:58 AM	Thread Starter #5
Puer Aeternus Member Join Date: Sep 2001 Location: In your head (Ottawa.Canada)	wahoo...got it working! Hooked the vga + adapter to the DVI port and the DVI connector to the mini Display port...rebooted and right away both monitors showed up w/ the smaller lcd showing as the extended monitor. I guess the VGA does not work w/ the mini display or HDMI port. Thanks for your help and input Felix :-) It seemed counter intuitive to hook it up this way thats why I did not try it the first time...I assume that the main display would be on the DVI connector, its just always been that way on my past few cards. So hooking up the 2nd monitor on the main DVI connection did not seem right. __________________ An Inflexible Belief System is B.S or I.B.S i5 750 @ 4 ghz, AC Freezer 7 rev2, Gigabyte P55M-UD2, 12 g's Mushkin Blackline 1600 dd3, Radeon 7970 Diamond Audigy 2 zs Win 7 64bit, Antec Earth Watts 650w Antec 900 Logitech G15
	QUOTE Thanks

VGA not working (7970)

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06-21-12, 10:02 AM	#6
felixthemaster Member Join Date: May 2012	no probs! I can't wait to afford another monitor because I just realised I could really double my productivity as Ive set way too many hotkeys to do the "alt+tab" thing! almost every button on my mouse and specials keys switches windows as i multitask all the time! does one of your monitors have display ports? because otherwise you cant do the eyefinity gaming thing __________________ Intel Core i5 2500k processor with stock cooler Sapphire 7870 2GB DDR5 Graphics Card MSI Z77A-GD55 Motherboard Corsair HX650 Modular power supply Western Digital 1TB Caviar Black HDD (Boot drive) \| Western Digital 320GB Scorpion Blue HDD Zalman Z11 Plus case with very negative pressure
	QUOTE Thanks

06-21-12, 03:56 PM	Thread Starter #7
Puer Aeternus Member Join Date: Sep 2001 Location: In your head (Ottawa.Canada)	My monitors are two diff sizes so eyefinity would look wonky....if I want to do any serious gaming I hook up my 40inch lcd as my main display and get busy in BF3 or Skyrim __________________ An Inflexible Belief System is B.S or I.B.S i5 750 @ 4 ghz, AC Freezer 7 rev2, Gigabyte P55M-UD2, 12 g's Mushkin Blackline 1600 dd3, Radeon 7970 Diamond Audigy 2 zs Win 7 64bit, Antec Earth Watts 650w Antec 900 Logitech G15
	QUOTE Thanks

06-21-12, 04:05 PM	#8
Knufire Senior Member Join Date: Feb 2010 Location: Bloomfield Hills, MI	VGA is an analog signal. HDMI and Displayport are both digital only standards, meaning you need a powered DAC (digital-analog converter) to go between the two, which can be quite expensive. DVI is meant as a bridge between both. Depending on the type of slot, it can provide analog or digital signals. DVI-D - Digital Only DVI-A - Analog Only DVI-I - Intergrated (both) However, if you have Displayport to DVI-I to VGA, all in passive adapters, it will NOT work, you need to convert the signal. DVI-I or DVI-A to VGA works fine though. __________________ i7-920 3.8 Ghz \| Venomous-X w/ Panaflo HS \| Sapphire Vapor-X 4890 EVGA X58 SLI LE \| 8GB Corsair Vengeance DDR3-1600 \| 500GB Samsung OEM \| Rosewill 850w \| Thermaltake Armor Series \| OCZ Vertex 2 60GB Secondary Rig: CM Elite 430 \| A8-3870K stock \| Radeon HD 6670 \| 500GB WD Caviar Blue \| 4GB G.SKILL DDR3-1333 \| ASUS A55 HEATWARE
	QUOTE Thanks

06-21-12, 09:56 PM	Thread Starter #9
Puer Aeternus Member Join Date: Sep 2001 Location: In your head (Ottawa.Canada)	well that explains it then. Thanks for the info, now I understand. __________________ An Inflexible Belief System is B.S or I.B.S i5 750 @ 4 ghz, AC Freezer 7 rev2, Gigabyte P55M-UD2, 12 g's Mushkin Blackline 1600 dd3, Radeon 7970 Diamond Audigy 2 zs Win 7 64bit, Antec Earth Watts 650w Antec 900 Logitech G15
	QUOTE Thanks

06-21-12, 11:30 PM	#10
felixthemaster Member Join Date: May 2012	i never knew there was an analouge DVI connector! I wish they'd just make one ujniversal plug for everything like sata or for display etc. something like usb __________________ Intel Core i5 2500k processor with stock cooler Sapphire 7870 2GB DDR5 Graphics Card MSI Z77A-GD55 Motherboard Corsair HX650 Modular power supply Western Digital 1TB Caviar Black HDD (Boot drive) \| Western Digital 320GB Scorpion Blue HDD Zalman Z11 Plus case with very negative pressure
	QUOTE Thanks

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