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Graphics card upgrade issue with hp h8-1234

Last response: in Graphics & Displays
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July 10, 2013 7:37:57 PM

I am having trouble with changing the gpu on my computer, i have a h8-1234 from hp and it has no on-board video, it came with an hd 7450 i believe and i tried to install a hd 7750, i also have a 600W power supply to replace too. the new power supply works great and boots the system with the old card but when the computer has the 7750 in there it just wont start up at all, no lights light up and fans turn on and when it does turn on the only thing i get is a black screen and nothing more. i did some research on the internet about this problem and found nothing to solve it. after a while i figured out a way to turn it on and that is by taking out the battery on the motherboard and plugging it back in after a while and the computer starts up nice and smooth and i can shutdown and restart with no problems at all since it boots back up with no problems. it would be great if it stayed like this but it doesn't, if the power cable that connects to the back of the power supply gets unplugged or the power in my house goes out its back to the same beginning and the only solution is to open the computer up again and take out the battery and put it back in and close the computer once more since the computer wont turn on at all or it has a black screen. i can manage like this but i still want to fix this permanently. does anyone have the same problem or similar? and have you guys found a way to fix this because it is kinda bothering me a bit now.

the new power supply (well new to this computer) is SeaSonic M12 SS-600HM 600W ATX12V V2.3
a c 259 U Graphics card
a c 140 ) Power supply
a b α HP
July 10, 2013 8:14:27 PM

If the old card allows the system to work normally, but the new card doesn't, I'd have to assume the new card is defective. How old is the CMOS battery, have you ever replaced it?
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July 11, 2013 10:14:19 AM

clutchc said:
If the old card allows the system to work normally, but the new card doesn't, I'd have to assume the new card is defective. How old is the CMOS battery, have you ever replaced it?


I bought the computer over a year ago. Both the old card and the new card work fine in my brother's computer.
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a c 259 U Graphics card
a c 140 ) Power supply
a b α HP
July 11, 2013 11:36:39 AM

Oh, the new card works. I missed that by reading too quickly, I guess. In that case, I would begin to suspect the PSU. But it is strange the old card doesn't affect it the way the new card does. They are almost identical cards (as far as the system is concerned) except for amp draw on the +12V rail. When you say that the loss of power to the System causes the issue, that would tend indicate a failing PSU; possibly capacitor(s) going bad. But it's strange that the old card doesn't affect it the same way. (??)
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April 15, 2014 4:47:11 PM

MAAC did you every resolve this problem? I have the same issue with this system and a XFX R9-270 and EVGA 600B PSU. Works fine with the stock GPU but when I place the XFX gpu in the system it will not display video?
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a c 259 U Graphics card
a c 140 ) Power supply
a b α HP
April 15, 2014 7:35:03 PM

Have you guys updated your MB BIOS to the latest version? I imagine if they are HP PCs that won't be easy. HP doesn't follow through on BIOS updates very well.
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May 14, 2014 6:09:54 PM

zirbesma said:
MAAC did you every resolve this problem? I have the same issue with this system and a XFX R9-270 and EVGA 600B PSU. Works fine with the stock GPU but when I place the XFX gpu in the system it will not display video?

Hey I have all the same hardware as you so if you find a solution please email me at brandoncosta@Gmail.com and if I find one I will let you know.
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May 14, 2014 9:12:02 PM

zirbesma said:
MAAC did you every resolve this problem? I have the same issue with this system and a XFX R9-270 and EVGA 600B PSU. Works fine with the stock GPU but when I place the XFX gpu in the system it will not display video?



Hey so I solved it!

I upgraded my BIOS and now its working!

I went to hp.com and put in my computer information and downloaded the update for the BIOS. I installed it and put in the new gpu and it booted up!

Notice: When I ran the BIOS update my computer froze for a bit. If it happens to you just wait, it will continue! DO NOT RESET!
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a c 259 U Graphics card
a c 140 ) Power supply
a b α HP
May 15, 2014 8:49:44 AM

photo238 said:
zirbesma said:
MAAC did you every resolve this problem? I have the same issue with this system and a XFX R9-270 and EVGA 600B PSU. Works fine with the stock GPU but when I place the XFX gpu in the system it will not display video?



Hey so I solved it!

I upgraded my BIOS and now its working!

I went to hp.com and put in my computer information and downloaded the update for the BIOS. I installed it and put in the new gpu and it booted up!

Notice: When I ran the BIOS update my computer froze for a bit. If it happens to you just wait, it will continue! DO NOT RESET!


Good job. I was afraid HP would update their BIOSs.
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!