Saphire HD 7770 OC version

[chrle]

hello ,I have saphire HD 7770,and no signal on monitor.

I boot up with another gpu and windows recognize HD 7770 but no video..

booting with only HD 7770 = no bios,no post,nothing. blank screen

Any ideas?

[Agent24]

Re: Saphire HD 7770 OC version

Bad video BIOS? Try reflash?

[chrle]

Re: Saphire HD 7770 OC version

I will try to reflash tomorrow.

[chrle]

Re: Saphire HD 7770 OC version

I reflashed bios but still nothing.

any ideas?

[Agent24]

Re: Saphire HD 7770 OC version

I don't know. Unless you have the wrong BIOS or something? I don't know what it means when half the stuff in GPU-Z is detected as "unknown"

Or maybe something wrong with the card's onboard power supply?

[chrle]

Re: Saphire HD 7770 OC version

I downloaded bios from http://www.techpowerup.com/vgabios/i...&model=HD+7770

[chrle]

Re: Saphire HD 7770 OC version

in GPU-z says amd radeon R 7 200 but this is HD 7000 series..

strange

[chrle]

Re: Saphire HD 7770 OC version

new pic

[Agent24]

Re: Saphire HD 7770 OC version

No idea, maybe it has a hardware fault.

[momaka]

Re: Saphire HD 7770 OC version

When the GPU or memory clocks are not running, that can also mean that either power is not getting to the GPU or GPU needs a reflow.

I had a similar problem with a Radeon 9700. No display or anything, but with a PCI-E video card, the PC was detecting the Radeon 9700 video card but just refusing to run it.

[Agent24]

Re: Saphire HD 7770 OC version

Yeah, power supply is what I was thinking too.

Check the VRM circuits - are they outputting anything? I assume you don't have a schematic. Find all the ICs likely to be VRM controllers\DC-DC controllers etc and look up the datasheets, find out where the outputs are and see if voltages are present and make sense.