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Computer not starting after installing new GPU

Last response: in Graphics & Displays
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June 7, 2013 4:24:02 PM

I recently got a new GPU which doesn't appear to be working at all.
System build is:
Gigabyte Z77-DS3H Mobo
8GB ddr3 Ram
intel i5 3570K CPU
Windows 8 32-bit OS
OCZ stealthstream2 700W PSU

I was using a NVIDIA Geforce 9800GT as never got round to upgrading. It has always worked like a dream.
I bought a Gigabyte AMD Radeon HD 7870 - uninstalled all nvidia drivers, deleted the 9800 GT and put in the new card.
The computer doesn't even start up. The fans all kick in(including the GPU fans) but the machine doesn't boot at all. I can't boot in safe mode, I can't get into BIOS options, no start up beeps, nothing.
Any advice would be greatly appreciated.

I am not sure whether its worth noting that my monitor is fairly old.
June 7, 2013 4:26:10 PM

Also, it may be worth noting that everything still works fine when I put the old 9800GT back in
June 7, 2013 4:29:00 PM


I recently got a new GPU which doesn't appear to be working at all.
System build is:
Gigabyte Z77-DS3H Mobo
8GB ddr3 Ram
intel i5 3570K CPU
Windows 8 32-bit OS
OCZ stealthstream2 700W PSU

Sorry to go off topic , but why are you running a 32bit OS when you have 8 gigs of ram.32 bit OS can only use about 3.5, you are wasting the other 4 gigs of ram.
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June 7, 2013 4:33:36 PM

Wonder if it's the motherboard.

Try CMOS reset?

Oh and good point SR.
June 7, 2013 4:38:44 PM

SR-71 Blackbird said:

I recently got a new GPU which doesn't appear to be working at all.
System build is:
Gigabyte Z77-DS3H Mobo
8GB ddr3 Ram
intel i5 3570K CPU
Windows 8 32-bit OS
OCZ stealthstream2 700W PSU

Sorry to go off topic , but why are you running a 32bit OS when you have 8 gigs of ram.32 bit OS can only use about 3.5, you are wasting the other 4 gigs of ram.


This I was only recently made aware of (bit of a amateur) but I will be fixing this shortly. Could it be to blame for the GPU issue?
June 7, 2013 4:41:37 PM

Shouldn't be the cause of the GPU issue.
June 7, 2013 4:42:36 PM

Your components are all good quality.
June 7, 2013 4:46:50 PM

Is it seated correctly and do you have the power connections all set.
June 7, 2013 4:53:29 PM

SR-71 Blackbird said:
Is it seated correctly and do you have the power connections all set.


Seated correctly in the same PCI slot as my old card and 2 six pin PCI-E connections plugged in. I have tested both connections with the old card to ensure they both work ok
June 7, 2013 5:01:25 PM

X79 said:
Wonder if it's the motherboard.

Try CMOS reset?

Oh and good point SR.


I don't have a jumper and don't think I got one with my M/board (or I cant find it). Does removing the battery do the same trick?

June 7, 2013 5:03:57 PM

Get back to us on your progress please.
June 7, 2013 5:08:26 PM

SR-71 Blackbird said:
Get back to us on your progress please.


I will. Thanks!
June 10, 2013 7:12:58 AM

SR-71 Blackbird said:
Get back to us on your progress please.


I worked through the list you posted and still nothing. Same result each time. Could it be a dodgy card?
June 10, 2013 8:07:35 AM

It's possible , i had to RMA one before.
!