Can only boot if I reset the cmos everytime after a new GPU install - - An Overclocking Community

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Can only boot if I reset the cmos everytime after a new GPU install

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post #1 of 2 (permalink) Old 02-26-2019, 02:50 PM - Thread Starter
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Can only boot if I reset the cmos everytime after a new GPU install

Ain't been on here or in the PC scene the last few years. I've got an old Core 2 Duo 1.8Ghz cpu @ 3.0Ghz OC on an Abit IP35-E motherboard 775 plus a ATI 3850HD 512MB which recently died so I went and got a old 7800GT to bung in it for awhile, did the trick but now I have just bought and installed a new AMD R7 250 2GB.

However when I booted the first time, nothing happened, turned on but black screen (no signal) so I reset the CMOS and it booted with defaults logged into windows 7 installed drivers etc.. Then rebooted and then nothing again just black screen (although I suspect that behind the scenes, the pc may be booting and running in to windows just fine, I just cannot see it)

I can only boot when I reset the CMOS by removing the battery everytime, once only, and cannot log in a second time. I have tried going into the bios(when its CMOS reseted) and just changing the date from 2007 to 2019 and hit save and exit but it won't boot again just black screen. However when I just hit exit and don't change a setting it will boot again. But once it gets into windows its all fine and then I shutdown it won't boot a second time.

So its like the bios can only run this GPU if its in default settings for the bios and that also implies my pc/windwos is editing the bios as it boots once but cannot a second time , so I guess its changing a setting in the bios automatically during the first boot and thats why I need to keep cmos reseting, although I don't know why i need to do this anyway? Really confused as to whats happened? Is my GPU not compatible? Is there a setting I need to do?


Last edited by OCZedd; 02-26-2019 at 02:56 PM.
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post #2 of 2 (permalink) Old 03-04-2019, 02:22 PM
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Can it boot normally again w/ the 7800GT ? Maybe the pins on the R7 are not fully compatible anymore ?

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