Topic Title: no display during boot sequence
Topic Summary: cannot access bios due to this issue
Created On: 01/29/2014 09:40 AM
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 01/29/2014 09:40 AM
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Posts: 2
Joined: 01/29/2014

Graphics Card

Sapphire HD6950 2GB reference model

succesfully flashed 6970 bios to enable extra shaders; card is running 890/1385 clocks via AMD Overdrive

card is watercooled (ek waterblock and backplate)


AMD Catalyst Driver Version, and Driver History

13.12, 13.1, 12.10, 12.8, etc - i update them as soon as a new driver is available


Operating System

windows 8.1 pro 64bit


Issue Details

The problem i am facing is this: when i start the machine, i see no splash screen on the display. After a small time windows login screen shows and i can perform my work and whatnot. I have lost access to bios completely. The motherboard has a feature that boots the system straight into bios, but the same thing happens. Weird thing is, if i press DEL at startup, i can see (judging by the power load - i have a unit that measuers real time wattage) that the system has entered uefi bios but i have no display and therefor cannot perform any action within it. Another relevant information - in display configuration (take note - not in AMD catalyst) i have 2 generic non-pnp displays. One is the monitor (a Benq FP 222Wa) and the other one is also a non-pnp display with 1024x768 resolution. If i try to disable it/uninstall driver for it, on the next reboot it shows up again. I have a spare video card (an old HIS HD4770) that does not show this behaviour.


So, can someone please advice me on how to regain display during POST to have access to the uefi bios?




Motherboard or System Make & Model

Asus Crosshair V Formula Z


Power Supply

Corsair TX650


Display Device(s) and Connection(s) Used

Benq FP222Wa

monitor is connected via a vga-dvi adaptor to the card


Applications and Games

all games and apps are working great


CPU Details

FX 8350

overclocked to 4600 mhz via UEFI, 23x multiplier, 1.467v


Motherboard BIOS Version



System Memory Type & Amount

Corsair Dominator Platinum 2800C11 2x4GB


Additional Hardware

Corsair F60 SSD as boot drive, 4 other sata hdd's of various size

cpu and gpu are watercooled; separate loops

12 fans for the radiators, 2 pumps


Additional Details

Avira free antivirus, windows defender and microsoft malicious removal tool run on a per day basis

Prime 95 blend, Prime 95 small FFT, Ycruncher - 1 hour run of each 

Furmark -  30 minutes run

SuperPi 32M - 3 runs

 01/29/2014 10:28 AM
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Polygon Pusher

Posts: 3530
Joined: 03/01/2009

Try it in another machine, Try a different graphics card. 

Has it happened ever since the bios was flashed? Did it happen before that point? Did the card ever sit in another motherboard and show the same issue?


I5 3570K@4~5.0ghz: Gigabyte GA-Z77X-UD3H:Corsair Hydro H110 :16GB Corsair Vengeance DDR-3 1600: x2 XFX Radeon 7950 @ 1100/1575 : Corsair AX 860 PSU: x1 WD Black 1TB HDD's: 90GB Agility 3: 960GB SSD : Creative Labs X-FI:Corsair 500R Arctic White Edition:3 22inch Monitors Eyefinity @ 5294x 1050 : Alienware Tact-X Keyboard: Razer Naga :Corsair Vengence 1500 Headset: Corsair SP2500 Speakers

 01/29/2014 10:36 AM
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Posts: 2
Joined: 01/29/2014

I don't have another machine to test it, but on the previous motherboard (crosshair IV formula) it was working perfect.

With a different card (the HD4770 i have as a spare) the issue is not present.

It has happened when i've upgraded the motherboard and until that moment i haven't had any problems with it.

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