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PC doesn't boot after CPU upgrade!

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August 23, 2014 1:22:50 PM

Hi Everyone! I replaced my current core i5 2400 3.1 ghz cpu with core i7 3770k 3.5 ghz. All i get is a black screen after i power up the computer. There are no beeps either. I'm not sure if there are any compatibility issues here. Thanks for any input!

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a b å Intel
a c 103 à CPUs
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August 23, 2014 1:25:52 PM

What motherboard do you have? For now, reinsert your i5-2400. Your i5 is a Sandy Bridge processor whereas the i7-3770 is Ivy Bridge; this is not an issue, as most Sandy Bridge motherboards support Ivy Bridge too. However to support Ivy Bridge, you need to update your motherboard's BIOS using your i5-2400.

Once your BIOS has been updated, you should be able to use the i7-3770. Please reply back with your motherboard and I'll assist in finding you the BIOS update, if the i7-3770 is supported.

All the best. :) 
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August 23, 2014 2:01:08 PM

Obnoxious said:
What motherboard do you have? For now, reinsert your i5-2400. Your i5 is a Sandy Bridge processor whereas the i7-3770 is Ivy Bridge; this is not an issue, as most Sandy Bridge motherboards support Ivy Bridge too. However to support Ivy Bridge, you need to update your motherboard's BIOS using your i5-2400.

Once your BIOS has been updated, you should be able to use the i7-3770. Please reply back with your motherboard and I'll assist in finding you the BIOS update, if the i7-3770 is supported.

All the best. :) 


Thanks a lot for such a quick reply! It's my friend's computer and it's Dell Vostro service tag 2CZWYQ1. I'm not sure what motherboard there is at the moment. I was playing with it yesterday. I actually updated the bios yesterday as i thought it could be the issue. Unfortunately, it didn't fix it. I'll be over his house tomorrow and i'll try to identify the motherboard.
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a b å Intel
a c 103 à CPUs
a b V Motherboard
August 23, 2014 2:43:59 PM

Thank you for your follow up response and for providing the Dell service tag, which is just as informing as knowing the motherboard. After entering the service tag at Dell's website, I found out that the system is a Dell OptiPlex 990. I researched further into the system and found out that the motherboard's chipset is Q67.

As the motherboard's chipset is Q67, unfortunately it only supports Sandy Bridge processors. Ivy Bridge support is only provided for Sandy Bridge motherboards with chipset H61, H67, P67 and Z68. Regardless of BIOS updates, the Dell OptiPlex will not support Ivy Bridge, it only supports Sandy Bridge as it's chipset is Q67. To conclude your friend's motherboard will not support Ivy Bridge, which the i7-3770 is. Apologies to be the bearer of bad news.

The only way to support the i7-3770 you have would be to upgrade the motherboard too, preferably one with a form factor of uATX/microATX/mATX, since the case of the OptiPlex is quite small. The i5-2400 is still solid in performance anyhow, it only lacks Hyper Threading which the i7's posses.

Anyhow all the best. :) 
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August 23, 2014 3:23:06 PM

Obnoxious said:
Thank you for your follow up response and for providing the Dell service tag, which is just as informing as knowing the motherboard. After entering the service tag at Dell's website, I found out that the system is a Dell OptiPlex 990. I researched further into the system and found out that the motherboard's chipset is Q67.

As the motherboard's chipset is Q67, unfortunately it only supports Sandy Bridge processors. Ivy Bridge support is only provided for Sandy Bridge motherboards with chipset H61, H67, P67 and Z68. Regardless of BIOS updates, the Dell OptiPlex will not support Ivy Bridge, it only supports Sandy Bridge as it's chipset is Q67. To conclude your friend's motherboard will not support Ivy Bridge, which the i7-3770 is. Apologies to be the bearer of bad news.

The only way to support the i7-3770 you have would be to upgrade the motherboard too, preferably one with a form factor of uATX/microATX/mATX, since the case of the OptiPlex is quite small. The i5-2400 is still solid in performance anyhow, it only lacks Hyper Threading which the i7's posses.

Anyhow all the best. :) 


Thanks a lot! I kind of suspected that it could the case:o ) I'll tell my friend about the options he has at this point! Thanks again! All the best! Enjoy your Saturday!
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August 23, 2014 4:14:21 PM

Roman Yegorov said:
Thanks a lot! I kind of suspected that it could the case:o ) I'll tell my friend about the options he has at this point! Thanks again! All the best! Enjoy your Saturday!


No problem at all, and thank you very much. Likewise, I hope you too enjoy the rest of your weekend. ;) 
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