Thanks for all the replies.

After much headache, I decided to buy another card since my blood pressure was going through the roof!!!

I've read other people having similar problems with Sapphires Radeon 7870 and their Gigabyte motherboards, so I bought a Asus Geforce 660ti OC edition and it booted perfectly (plus it came with Borderlands 2 as well :)), I've had absolutely no troubles. Now to test some games and hopefully see some killer performance :)

^^^ Yep, we used both DVI-HDMI and HDMI and still no luck

Hi

Some more good and bad news :S

I took my PC to a repair shop and the guy looked at it for free. The graphics card is working fine on his test bench system and is booting up and everything. So, I went home and ordered a new motherboard, a gigabyte z77x-d3h (the other was a z77-ds3h) since we thought it must of been a bad PCI slot. Guess what? It still won't boot up *pulls out hair*.

This is very maddening. Either there is some compatibility issue between Sapphire Radeons and Gigabyte z77 line or my power supply just isn't cutting it. The guy at the store seems to strongly think it is a PSU problem. He checked my PSU with those electrical meters and it's working fine. (PSU is a thermaltake smart 530w+80).

Any ideas anyone?

Thanks in advance

The PSU is a Thermaltake 530w 80plus so it should be able to run it fine.

Unfortunately, I don't know anyone whose system I could try it out on.

bump?

UPDATE - just uninstalled the drivers where it is listed as 'standard vga graphics adapter' in the device manager. Reinstalled and now it says 'Video Controller (VGA compatible)'.

Tried installing the latest catalyst drivers and still no luck. When manually trying to search for drivers, it just lists 'Standard VGA Graphics Adapter'.

Hi

Just built my first new PC and I'm having trouble with getting the video card to work.

The spec is the following:

Gigabyte Z77MX-D3H

Intel i5 3450

Sapphire Radeon 7870 2gb

Kingston Value Ram

Thermaltake 550w PSU

I'm using my HDTV as a monitor

Everything seems to be working fine. All the fans are spinning, including the 7870's fans. Both the PCIE 6pin connectors are firmly secured. The card itself is firmly seated, as it has to be otherwise it wouldn't screw itself in the back of the case.

Connecting to the onboard graphics via HDMI works fine, however when I try booting the system with the HDMI cable in the 7870, I don't get any signal, it doesnt even show BIOs. Nothing whatsoever.

I've updated my BIOs, installed all the drivers on the motherboard from the CD that came with it.

In the device manager, under display adapters, it says 'Standard VGA graphics adapter'. I have no idea if this is refering to the onboard graphics card or the 7870.

I've tried downloading the latest ATI drivers (12.8) and I've made sure they were for the 64bit of Windows 7 which I am running. It installs, but nothing seems to happen after. When it finishes, it says in the install box that warnings have occured, then links me to Internet Explorer but doesn't specify any warnings, it just details what's been installed.

Currently, the version of Windows 7 I'm running doesn't have a product key as I have yet to purchase a copy of Windows, but I will be doing so in a couple of days. I've got all the latest updates for Windows.

I've also tried going into the BIOs, disabling the onboard graphics and making sure it runs the display off PEG (PCIE). That didn't work so I had to reset the BIOs.

I've literally ran out of ideas and I'm stumped as to what to do.

Thanks in advance for any help :)