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GPU not working after CPU upgrade

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a b à CPUs
August 28, 2014 8:24:43 PM

Greetings, im having quite a trouble right now, i swapped my intel G620 for a 2500, because i got it dirt cheap, and well, when i booted the system, my radeon HD 6750 didn't gave any video, i didn't pay importance to that yet, just swapped the vga cable to the onboard video, i checked temps, ran stress tests and everything was allright with the cpu, and when i started looking why the gpu wasn't giving any signal, i checked the bios and it said that there was no card on the pciex16 slot, then i started to worry.

So far, i reseated the card, checked the power connector, removed the mobo battery for a while, im sure that im missing a detail here, my system is this:

CPU: Intel 2500 (i have the spare g620 also)
motherboard: intel dh61ww
GPU: Radeon HD6750 (Quite old, i know)
HD: A 500GB western digital and a 500GB seagate (dont remember which i boot lol)
PSU: Evga 500W

Every help is apreciated.

More about : gpu working cpu upgrade

a b à CPUs
August 28, 2014 9:05:21 PM

Maybe the GPU has died? Insert the card in some other compatible computer and see if it works.
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a b à CPUs
August 28, 2014 9:12:19 PM

Install all drivers etc, alot of people recommend a fresh windows install for a new cpu.
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a b à CPUs
August 28, 2014 9:19:59 PM

Thnaks for the ansewers MostWantedSoulRider and LookItsRain, i'll try to get another card to confirm that, also i dont think that is a driver problem, as the bios dont list the card on the pciex16 slot.
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a b à CPUs
August 28, 2014 9:50:01 PM

Yea, if it doesn't list it out, then better check the card in another computer and tell us what happened. We are waiting.
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a b à CPUs
August 28, 2014 9:51:09 PM

I just swapped back the old G620 and guess what, GPU was working, what kind of black magic is this?
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a b à CPUs
August 28, 2014 9:54:05 PM

As I said above, it must be faulty graphics card. Sorry, OP.
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a b à CPUs
August 28, 2014 10:07:17 PM

MostWantedSoulRider said:
As I said above, it must be faulty graphics card. Sorry, OP.


The graphics card worked again when i swapped the old cpu (G620), i dont know why with the other cpu (2500) didn't recognize the gpu, any ideas?
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a b à CPUs
August 28, 2014 10:13:05 PM

mlga91 said:
MostWantedSoulRider said:
As I said above, it must be faulty graphics card. Sorry, OP.


The graphics card worked again when i swapped the old cpu (G620), i dont know why with the other cpu (2500) didn't recognize the gpu, any ideas?


So, do you mean that your HD 6750 works with only with your old processor and not with the new one, OP?
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a b à CPUs
August 28, 2014 10:31:43 PM

MostWantedSoulRider said:
mlga91 said:
MostWantedSoulRider said:
As I said above, it must be faulty graphics card. Sorry, OP.


The graphics card worked again when i swapped the old cpu (G620), i dont know why with the other cpu (2500) didn't recognize the gpu, any ideas?


So, do you mean that your HD 6750 works with only with your old processor and not with the new one, OP?


Yes, just like that.
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a b à CPUs
August 28, 2014 10:46:33 PM

What BIOS version do you have on your mobo?
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a b à CPUs
August 28, 2014 10:53:53 PM

volcanoscout said:
What BIOS version do you have on your mobo?


Its this one:
BEH6110H-86A-0038-2012-0110-1653

I have never updated the bios, maybe i should give it a try, what do you think?
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a b à CPUs
August 28, 2014 11:02:37 PM

Flash your BIOS and try the card with your new processor. Maybe that's the key.
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a b à CPUs
August 28, 2014 11:34:16 PM

My first suggestion would be to update to the latest bios version. Your new CPU may not be supported with your current bios version.

If that does not solve you problem It is generally recommended to reinstall your operating system and all drivers when changing out a CPU. Not doing so can cause conflicts that have all sorts of unattended consequences.
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a b à CPUs
August 28, 2014 11:38:14 PM

Just updated the bios, still, video card is not recognized in bios, im starting to believe that i have a faulty chip here. The guy who sold it to me told me that he took it from a hp desktop pc, could hp have used a "cheaper" oem 2500 with no pciex16 support?
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a b à CPUs
August 28, 2014 11:40:11 PM

mlga91 said:
Just updated the bios, still, video card is not recognized in bios, im starting to believe that i have a faulty chip here.


That is always a possibility but generally CPUs are one of the most reliable part of a PC with a very low DOA rate. What is your motherboard model?

Edit -nvm I somehow missed it in the OP

Have you tried starting in safe mode so that it uses generic drivers to see if it may be a driver or firmware issue?
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a b à CPUs
August 28, 2014 11:40:47 PM

Did you try changing the initial display output to PCI 1 (if x16 slot) in BIOS?
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a b à CPUs
August 28, 2014 11:41:00 PM

Its a intel DH61WW
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a b à CPUs
August 28, 2014 11:43:05 PM

MostWantedSoulRider said:
Did you try changing the initial display output to PCI 1 (if x16 slot) in BIOS?


Its set there, the bios lists all the pci and pcie ports, and lists what you're using on them, thats why im saying that its not recognized even by the bios. With the other cpu (the G620) it appears like its ocupied.
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a b à CPUs
August 28, 2014 11:58:18 PM

I was busy typing out a long post when I noticed my reply has been overrun by events:)  When you updated your BIOS, how did you do it, and which version did you just flash it to?
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a b à CPUs
August 29, 2014 12:11:30 AM

The minium version required for both cpus was the 0016, i had the 0038, and i updated it to the 0048, was not the latest, but according to intel page, i couldn't jump from the 0038 to the latest version, and i used the express method.
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a b à CPUs
August 29, 2014 12:24:44 AM

Okay, I was worried you wouldn't catch that in the instructions. I would continue to follow the BIOS update path (Intel ME update, 0099, 0120) but I would also update your chipset driver.


In your BIOS and/or Windows System Information, is your 2500 being reported correctly?
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a b à CPUs
August 29, 2014 7:30:58 AM

volcanoscout said:
Okay, I was worried you wouldn't catch that in the instructions. I would continue to follow the BIOS update path (Intel ME update, 0099, 0120) but I would also update your chipset driver.


In your BIOS and/or Windows System Information, is your 2500 being reported correctly?


Yes, its reported correctly. Im currently installing the 0099 bios, if that dont work i'll try the 0120 bios.

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a b à CPUs
August 29, 2014 12:13:03 PM

Good and bad news, i just updated the bios to the latest 0120 version, the good news, the user interface is quite nice now, the bad news, still no signs of life on the pciex16 port. I'll try with another motherboard later and another vga later, so far, another cpu (intel g620) works. Im kinda disapointing myself for this purchase.
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a b à CPUs
August 29, 2014 9:42:19 PM

Greetings, a little update here. I just have tested the cpu in another motherboard, i had the same results, cpu working but not no signs of life on the pciex16 slot.

All that i have left is to test with another video card, to discard the minium possibility of incompatibility between those parts. Im trying to undestand a logical reason of why a cpu could work this way, cpu working 100% but not comunicating with the pciex16 slot.
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a b à CPUs
August 29, 2014 10:49:47 PM

So it could be a faulty processor? Never been through this issue before, OP. It's really weird. Maybe, a new processor would be a resolution.
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a b à CPUs
August 30, 2014 5:58:03 AM

Check in your BIOS in advanced settings, system configuration or system agent configuration. Look for NB PCI-E configuration. Look to see what your PCI-EX16 link speed is set to - Gen 3,2,1. If it's set to Gen 3, drop it to 2 and see if the card is recognized.
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a b à CPUs
August 30, 2014 7:00:58 PM

I think HP has done some black magic to it and fucked it up somehow. There both sandy bridge etc. Makes zero sense.
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a b à CPUs
August 30, 2014 7:37:46 PM

I agree. My next suggestion requires some dried chicken bones, fresh gecko eyeballs, and some Oreos...
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a b à CPUs
August 30, 2014 7:42:28 PM

volcanoscout said:
I agree. My next suggestion requires some dried chicken bones, fresh gecko eyeballs, and some Oreos...


I have those things, everything except oreos, hard to find nowadays.
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a b à CPUs
August 30, 2014 7:49:34 PM

mlga91 said:
volcanoscout said:
I agree. My next suggestion requires some dried chicken bones, fresh gecko eyeballs, and some Oreos...


I have those things, everything except oreos, hard to find nowadays.


You can substitute Cocoa Puffs, but then you'll need some un-homogenized organic whole milk. You'll want to lay down some plastic sheeting under your PC though...

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a b à CPUs
September 4, 2014 1:56:12 PM

Greetings, a little update here, i already tried with another video card, a gtx 750, and another psu, a generic one, dont remember the brand really, but i got the same results, no video output on the dedicated videeo graphics card, and pci-e x16 slot not populated on the bios. Im sending the cpu back, i hope that a i can get a working one, or my money back.
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