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3rd monitor not detected

post #1 of 5
Thread Starter 
Hello!. I've posted this on a few forums and haven't been able to fix it yet. So hopefully someone here will be able to help!

I'm trying to get my 3rd monitor working but am unable to. I have 2 Dell U2312HM monitors connected via DVI - Mini DP which work fine.

However the third monitor (same as above) is not recognized via DVI to DVI. I have switched them all around to make sure all monitors are working & all the ports are working.

After the PC logs in, the 3rd monitor looses signal and turns off. I have the Intel i7 3770 @ 3.4GHz, AMD Radeon HD 7870 2GB, 16GB RAM and the Dell XPS 8500 standard motherboard running Windows 7 64bit. I have uninstalled all the AMD drivers and re installed them (latest versions) and still no luck.

I should also point out that I'm not looking to use Eyefinity, I just need all the monitors working.

Please help me, this is incredibly frustrating!

Thanks
post #2 of 5
Hi Mikeb1200. When moving the monitors around, did you have any similar issues with the other two when connected directly using the DVI-DVI connection? Do all three displays work fine when you connect and use them individually with your system?

Harry @ Videocardshop.co.uk
post #3 of 5
Thread Starter 
Hi Harry,

Thanks for the reply.

Yes, all of them work individually on any of the available connections. I was previously using DVI - DVI and DVI - HDMI and it was just the Mini DP one that wouldn't work which led me to think there was a problem with the adapter but now both are running on DVI - Mini DP & it's the DVI / HDMI that won't work. So it seems it's perhaps a software issue?

Mike
post #4 of 5
even when you are not trying to setup Eyefinity 3

to get all 3 monitors working, you'll need an Active Adapter to convert a Display port to anything you want

or get monitor with Display port plug ins
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LanBoy Air Orange
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Upside Down S8
(49 items)
 
CPUMotherboardGraphicsRAM
i7-3970X ASUS RAMPAGE IV Formula MSI GTX 1080 FE Crucial Ballistix Tactical Tracer 
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OCZ Vertex 4 Seagate Barracuda ST3000DM001 Samsung Pro None 
CoolingOSOSMonitor
DeepCool CAPTAIN 120 Ubuntu Gnome 16.04 LTS Win10 x64 Asus VG278H 
MonitorMonitorMonitorKeyboard
Asus VG278H Asus VG278H BenQ GW2750HM Logitech G510 
PowerCaseMouseMouse Pad
OCZ ZX 1250W Antec LanBoy Air Zalman ZM-GM4 StarCitizen RSI 
AudioAudioAudioOther
X-Fi MB2 Logitech Z560 Sennheiser PC 163D THRUSTMASTER T.Flight Hotas X 
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nVidia 3D Vision 2 Saitek PZ35 TrackIR 5 
CPUMotherboardGraphicsGraphics
FX-8150 ASUS Crosshair V Formula ASUS EAH6870 DC/2DI2S/1GD5 ASUS EAH6870 DC/2DI2S/1GD5 
RAMHard DriveOptical DriveOS
Mushkin Silverline 8GB OCZ Vertex 3 LG GGC-H20LI Win10 x64 
MonitorMonitorMonitorKeyboard
BenQ W5000 Samsung 50" smart TV S7 Logitech diNovo Edge 
PowerCaseAudioOther
Corsair 800w Thermatake DH 102 Logitech Z-5500 Thermaltake Water 2.0 Performer CLW0215 
CPUMotherboardGraphicsGraphics
BX80662I76700K GIGABYTE G1 Gaming GA-Z170X MSI GTX 1080 Sea Hawk EK X MSI GTX 1080 Sea Hawk EK X 
RAMRAMHard DriveHard Drive
CMU32GX4M2C3200C16R CMU32GX4M2A2666C16 OCZ Vertex 4 Seagate ST8000NM0055 
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SAMSUNG 950 PRO M.2 SAMSUNG 950 PRO None EK-CoolStream PE 360 (Triple) 
CoolingCoolingCoolingCooling
LED 3mm TWIN ULTRA WHITE LED 5mm TWIN ULTRA WHITE EK-AF Ball Valve (10mm) G1/4 - Black Nickel EK-D5 PWM G2 Motor (12V DC PWM Pump Motor) 
CoolingCoolingCoolingCooling
EK-HD PETG Tube 12/16mm 1000mm (8pcs) EK-HDC Fitting 16mm G1/4 - Red EK-ACF Fitting 12/16mm - Red TUBE PrimoChill PrimoFlex Advanced LRT 15,9 / 1... 
CoolingCoolingCoolingCooling
QD3-MSG4-BK QD3-FSG4-BK EK-CoolStream PE 240 (Dual) EK-CoolStream XE 360 (Triple) 
CoolingCoolingCoolingCooling
EK-XTOP Revo D5 PWM - Plexi (incl. pump) EK-Supremacy EVO - Nickel EK-FC Terminal TRIPLE Parallel - Plexi EK-FC Terminal BLANK Parallel 
CoolingOSOSOS
EK-UNI Pump Bracket (120mm FAN) Ubuntu Gnome 16.04 LTS Win10 x64 Win7 x64 
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Asus VG278H Asus VG278H Asus VG278H BenQ GW2750HM 
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Logitech G510 PS-TPG-1500DPCTXX-T CaseLabs Mercury S8 + Pedestal + Pedestal  Logitech G600 
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StarCitizen RSI Creative Labs Core 128 Logitech Z560 Sennheiser PC 163D 
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post #5 of 5
Thread Starter 
I believe i'm using 2 active adapters. As I'm living in china at the moment it's hard to tell as they don't explictly say if it's active or not so I'm kind of judging by the price.

Even when I had DVI - DVI, DVI -HDMI and DVI - Mini DP with an Apple adapter (which I assume is active as it has to drive their huge monitors) it didn't work.

All the monitors have Displayports so I'm ordering a DP > mini DP cable right now. Will that do the trick you think?
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